博士（工学）, 大阪大学

energy transfer

optical spectroscopy

Quantum Chemistry

Photophysical Chemistry

sensor

有機機能材料

coordination polymer

luminescence

希土類

錯体化学

光化学

Nanotechnology/Materials, Organic functional materials

Nanotechnology/Materials, Inorganic/coordination chemistry

Nanotechnology/Materials, Functional solid state chemistry

Bachelor's degree program, School of Engineering

Master's degree program, Graduate School of Chemical Sciences and Engineering

Doctoral (PhD) degree program, Graduate School of Chemical Sciences and Engineering

May 2021, The Rare Earth Society of Japan, Award
希土類配位空間の設計と光機能化

Apr. 2017, MEXT, Award of the Minister of Education, Culture, Sports, Science and Technology (MEXT), Japan
強発光を示す希土類分子ナノ材料に関する研究
Yasuchika Hasegawa

Jun. 2016, Imaging Society of Japan, Research Award of Konica Minolta Science and Technology Foundation
希土類錯体の光機能創出と画像技術応用
Yasuchika Hasegawa

Mar. 2014, The CSJ (The Chemical Society of Japan), The CSJ (The Chemical Society of Japan) Award for Creative Work
Study on lanthanide nanomaterials with characteristic photo-functional properties
Yasuchika Hasegawa

Sep. 2013, The JPA (Japanese Photochemistry Association), The JPA (Japanese Photochemistry Association) Award
Study on characteristic structures and photo-functional properties of lanthanide nanomaterials
Yasuchika Hasegawa

Mar. 2010, 平成２１年度NAIST学術賞
希土類を基盤とした光機能ナノ物質の創成
長谷川靖哉

Sep. 2006, 光化学協会, 光化学協会奨励賞
希土類元素を基盤とする光機能材料の開拓
長谷川靖哉

May 2004, 日本希土類学会, 第９回・日本希土類学会奨励賞
光機能を有する希土類錯体および希土類ナノ結晶の創成
長谷川靖哉

Doublet Charge Transfer Emission of Cerium(III) Complexes with Strong Electron-Accepting Ligands
Toranosuke Tomikawa; Kenichiro Saita; Yuriko Ono; Tomoko Akama; Mengfei Wang; Sunao Shoji; Masato Kobayashi; Koji Fushimi; Takayuki Nakanishi; Tetsuya Taketsugu; Yasuchika Hasegawa; Yuichi Kitagawa
The Journal of Physical Chemistry Letters, 16, 49, 12655, 12660, American Chemical Society (ACS), 04 Dec. 2025
Scientific journal

Diblock Copolypeptide Amphiphiles-Mediated Assembly and Structural Modulation of Porphyrin Dimers in Aqueous Media.
Keita Kuroiwa; Yuya Tanimura; Mengfei Wang; Mitsuhiko Morisue; Yasuchika Hasegawa
Langmuir : the ACS journal of surfaces and colloids, 27 Nov. 2025, [International Magazine]
English, Scientific journal, We report the design and self-assembly of supramolecular nanohybrids composed of a lipophilic zinc porphyrin dimer (ZnP)2 and diblock copolypeptide amphiphiles. The peptide amphiphiles were designed with hydrophilic segments containing aspartic acid (Asp) and lysine (Lys) residues that favor β-sheet formation and hydrophobic segments composed of leucine (Leu) residues that drive aggregation in aqueous media. This balance of hydrophobic and hydrophilic interactions promotes the spontaneous formation of nanostructures such as vesicles and lamellae in aqueous media, resulting in highly organized hybrid assemblies. UV-vis absorption and fluorescence spectroscopy revealed that the interaction between (ZnP)2 and the peptides significantly affects the conformation of the porphyrin units. Absorption spectra showed shifts in the B (Soret) and Q bands upon hybridization, reflecting changes in π-conjugation and planarity. Fluorescence emission spectra, particularly those excited at the B band (443 or 494 nm), displayed a distinct band around 741 nm, attributed to the planar conformation of (ZnP)2. The corresponding excitation spectra matched well with the absorption features of planar (ZnP)2, confirming the selective excitation of these conformers. Spectroscopic analyses, including IR and circular dichroism spectroscopy, reveal that the polypeptide components adopt β-sheet-rich secondary structures, which play a critical role in inducing and stabilizing the planar conformation of the embedded (ZnP)2 units. Importantly, the planar conformation of (ZnP)2 is induced by strong intramolecular exciton coupling between the porphyrin chromophores, as evidenced by distinct luminescence spectra in the near IR region. Moreover, the incorporation of Asp residues into the hydrophilic domain further promotes β-sheet formation, contributing to the structural integrity and water solubility of the nanohybrids, leading to intermolecular interactions between (ZnP)2s in copolypeptide amphiphiles. These results demonstrate that cooperative self-assembly of metal complexes with sequence-defined polypeptide amphiphiles enables the emergence of dynamically responsive and functional supramolecular materials in water, offering new design principles for optoelectronic and bioinspired nanomaterials.

Ligand triplet energy escape in lanthanide complexes for developing luminescent molecular thermometers
Yusaku Yamaguchi; Takuma Nakai; Shun Omagari; Mengfei Wang; Yasuchika Hasegawa; Yuichi Kitagawa
Communications Chemistry, 8, 1, Springer Science and Business Media LLC, 01 Sep. 2025
Scientific journal

Dynamic Molecular Triplet Excitons Tune Lanthanide Emission Lifetime
Takuma Nakai; Kaori Shima; Mengfei Wang; Sunao Shoji; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa; Yuichi Kitagawa
Angewandte Chemie International Edition, Wiley, 26 Aug. 2025
Scientific journal, Abstract

Optical codes generated from the emission lifetimes of lanthanide complexes have received considerable attention for their potential application in multiplexed bioimaging and anti‐counterfeiting. However, such tunable lifetimes are limited to short ranges (0.01−1 ms). Herein, we describe a method that extends the emission lifetime using dynamic molecular triplet excitons in aggregation systems composed of lanthanide complexes. To demonstrate the conceptual method, molecular crystals comprising lutetium (Lu³⁺) and luminescent lanthanide (europium: Eu³⁺ or terbium: Tb³⁺) complexes with two organic ligands (2,2,6,6‐tetramethyl‐3,5‐heptanedionate and 2,7‐bis(diphenylphosphoryl)phenanthrene) were prepared. These molecular crystals exhibited persistent emission via slow triplet exciton migration between the phenanthrene units. The extended degree of the lifetime could be controlled between 1 and 152 ms by ligand modifications. This proposed lifetime‐tuning method should significantly expand the encoding capacity of lanthanide complexes.

Drastic Mechanochromic Luminescence Through Fluorescence–Phosphorescence Switching in a Heavy‐Atom‐Free Organoboron Compound
Yohei Adachi; Maho Kurihara; Shota Hosoya; Shota Terao; Masashi Nakamura; Yuichi Kitagawa; Yasuchika Hasegawa; Joji Ohshita
Advanced Optical Materials, Wiley, 26 Jun. 2025
Scientific journal, Abstract

Fluorescence and phosphorescence are emissions from molecules in the lowest excited singlet state (S₁) and the lowest triplet state (T₁), respectively. Generally, as the S₁ and T₁ energy levels are different, the fluorescence and phosphorescence wavelengths are also different. By switching between these emissions through mechanical stimuli, a drastic change in emission color can be achieved. However, organic molecules typically have low intersystem crossing efficiency, making it difficult for them to exhibit phosphorescence. Therefore, organic dyes that exhibit remarkable mechanochromic luminescence (MCL) via the switching between thermally activated delayed fluorescence (TADF) and room‐temperature phosphorescence (RTP) are extremely limited. In this study, heavy‐atom‐free molecules are synthesized. One of them, which has a bulky amino group to a benzodithienoborepin core, exhibited green TADF in solution and the amorphous state, and orange RTP in the crystalline state. This switching between TADF and RTP is enabled by mechanical grinding. Furthermore, DFT calculations and single‐crystal X‐ray structural analysis revealed that the twisting of the bulky amino group in the crystalline state induces the switching between TADF and RTP.

The conformational arrangement effect of luminescent Eu(III) coordination polymers with phenylene diamide units on structural and photophysical properties
Joe Hayashi; Mengfei Wang; Yuichi Kitagawa; Yasuchika Hasegawa
Bulletin of the Chemical Society of Japan, 98, 4, Oxford University Press (OUP), 09 Apr. 2025
Scientific journal, Abstract

Luminescent Eu(III) coordination polymers with phosphine oxide linker ligands that contain phenylenediamide units [Eu(hfa)3p-dpba]n, [Eu(hfa)3dppt]n, and [Eu(hfa)3dppb]n (hfa: hexafluoroacetylacetonate, p-dpba: N,N′-(1,4-phenylene)bis(4-(diphenylphosphoryl)benzamide, dppt: N1,N4-bis(4-(diphenylphosphoryl)phenyl)terephthalamide, dppb: 4-(diphenylphosphoryl)-N-(4-((4-(diphenylphosphoryl)phenyl)carbamoyl)phenyl)benzamide) were reported. The structural and photophysical properties of the Eu(III) coordination polymers were evaluated. The phase-transition temperatures of [Eu(hfa)3p-dpba]n, [Eu(hfa)3dppt]n, and [Eu(hfa)3dppb]n were determined to be 153, 148, and 79 °C, respectively. The overall emission quantum yield (Φππ*) and photosensitized efficiency (ηsens) excitation of [Eu(hfa)3dppt]n (Φππ* = 19%, ηsens = 43%) and [Eu(hfa)3dppb]n (Φππ* = 19%, ηsens = 37%) under 370 nm of excitation were found to be larger than those of [Eu(hfa)3p-dpba]n (Φππ* = 4.4%, ηsens = 6.8%). We demonstrate systematic evaluation of the structural and photophysical properties of the amide units.

Full Picture of Energy Transfer in a Trivalent Europium Complex with Bidentate β-Diketonate Ligand
Shiori Miyazaki; Motoaki Gotanda; Yuichi Kitagawa; Yasuchika Hasegawa; Kiyoshi Miyata; Ken Onda
The Journal of Physical Chemistry Letters, 24 Oct. 2024, [Peer-reviewed]
Scientific journal

Luminescence changeable CO2‐storage cylinder: Triple‐stranded helical Eu(III)/Tb(III) fluorinated MOFs with amide linkers
Joe Hayashi; Shinichiro Iwamura; Yuta Nakasaka; Mengfei Wang; Sunao Shoji; Yuichi Kitagawa; Koji Fushimi; Shin R. Mukai; Yasuchika Hasegawa
Chemistry – A European Journal, Wiley, 09 Sep. 2024, [Peer-reviewed], [Corresponding author]
Scientific journal, Triple‐stranded helical lanthanide MOFs with CO2 adsorption properties were investigated. Lanthanide MOFs ([Eu0.1Tb0.9(hfa)3(dpa)]n) are composed of lanthanide luminophores (Eu(III) and/or Tb(III) ions), fluorinated antenna ligands (hfa: hexafluoroacetylacetonate), and polyamide‐type linker ligands (dpa: 4‐(diphenylphosphoryl)‐N‐(4‐(diphenylphosphoryl)phenyl)benzamide). The cylindrical structure was characterized by single‐crystal X‐ray analysis, thermogravimetric analysis, and gas adsorption measurements. The inner surfaces of the cylindrical channels were covered with the fluorine atoms of the hfa ligands. The emission intensity ratio (IEu / ITb) in [Eu0.1Tb0.9(hfa)3(dpa)]n is affected by the CO2 gas adsorption behavior. The change in IEu / ITb value was caused by the intermolecular interactions between the CO2 gas molecules and the fluorinated ligands, resulting in an electronic structural change of the lowest triplet excited state in the photosensitized hfa ligands.

Photodynamic Effect of Amphiphilic N^∧C^∧N-Coordinated Platinum(II) Complexes in Human Umbilical Vein Endothelial Cells
Shingo Hattori; Mizuki Ogishima; Tadaaki Nakajima; Shota Hosoya; Yuichi Kitagawa; Yasuchika Hasegawa; Shinji Nonose; Tomomi Sato; Kazuteru Shinozaki
Inorganic Chemistry, American Chemical Society (ACS), 12 Jul. 2024, [Peer-reviewed]
Scientific journal

π-4f charge-transfer emission in a trivalent europium complex
Yuichi Kitagawa; Toranosuke Tomikawa; Kota Aikawa; Shiori Miyazaki; Tomoko Akama; Masato Kobayashi; Mengfei Wang; Sunao Shoji; Koji Fushimi; Kiyoshi Miyata; Yuichi Hirai; Takayuki Nakanishi; Ken Onda; Tetsuya Taketsugu; Yasuchika Hasegawa
29 May 2024, [Peer-reviewed]

Chiral Tetrakis Eu(III) Complexes with Ammonium Cations for Improved Circularly Polarized Luminescence.
Makoto Tsurui; Ryohei Takizawa; Yuichi Kitagawa; Mengfei Wang; Masato Kobayashi; Tetsuya Taketsugu; Yasuchika Hasegawa
Angewandte Chemie (International ed. in English), e202405584, 26 May 2024, [Peer-reviewed], [Corresponding author], [International Magazine]
English, Scientific journal, Large dissymmetry factor of the circularly polarized luminescence (gCPL) was observed in ligand and coordination tuned chiral tetrakis europium (Eu(III)) complexes with ammonium cations. The gCPL value was estimated to be -1.54, which is the largest among chiral luminescent molecules. Through photophysical measurements, single crystal X-ray structural analyses and quantum chemical calculations, changes in the geometric and electronic structures were observed for a series of chiral tetrakis Eu(III) complexes which enhanced the gCPL value. The emission quantum yield and photosensitized energy transfer efficiencies of chiral Eu(III) complexes with ammonium cations were also larger than that with previous Cs+. Based on the systematic modifications and analyses for chiral tetrakis Eu(III) complex, effect of the ammonium cation on enhanced CPL brightness is reported.

Effective photosensitized emission of a Tb(III) complex using a β-diketonate photosensitizer and an oxygen barrier system in a thermally populated triplet state.
Kota Inage; Mengfei Wang; Yasuchika Hasegawa; Yuichi Kitagawa
Dalton transactions (Cambridge, England : 2003), 53, 20, 8555, 8562, 21 May 2024, [Peer-reviewed], [International Magazine]
English, Scientific journal, Photosensitizer design of luminescent terbium (Tb(III)) complexes with narrow bandwidths is important for advancing luminescent materials. In this study, we report an effective photosensitizer model in a thermally populated lowest excited triplet (T1) state during Tb(III) emission. The Tb(III) complex comprises a Tb(III) ion (serving as an emission center), hexafluoroacetylacetonates (acting as photosensitizer ligands), and bulky cyclohexyl group-attached phosphine-oxide-type ligands (functioning as an oxygen barrier system). Emission properties including emission and excitation spectra, ligand-excited emission quantum yields, and emission lifetimes were evaluated in the absence and presence of oxygen. Coordination geometry structures were determined through analysing single-crystal structures. The electronic structure based on 4f-orbitals was estimated from radiative rate constants and quantum chemical calculations. The bulky phosphine oxide ligand not only provides an oxygen barrier system but also induces an electronic structural modulation based on 4f-orbitals, allowing for effective photosensitized Tb(III) emission in a thermally populated ligand T1 state in air.

Guest-Responsive Near-Infrared-Luminescent Metal–Organic Cage Organized by Porphyrin Dyes and Yb(III) Complexes
Shota Hosoya; Sunao Shoji; Takayuki Nakanishi; Masato Kobayashi; Mengfei Wang; Koji Fushimi; Tetsuya Taketsugu; Yuichi Kitagawa; Yasuchika Hasegawa
Inorganic Chemistry, American Chemical Society (ACS), 21 May 2024, [Peer-reviewed]
Scientific journal

Highly Efficient and Thermally Durable Luminescence of 1D Eu3+ Coordination Polymers with Arsenic Bridging Ligands
Haruki Shimoji; Yuto Aoyama; Kota Inage; Masashi Nakamura; Takumi Yanagihara; Kazuhiro Yuhara; Yuichi Kitagawa; Yasuchika Hasegawa; Shunichiro Ito; Kazuo Tanaka; Hiroaki Imoto; Kensuke Naka
Chemistry – A European Journal, Wiley, 09 Apr. 2024, [Peer-reviewed]
Scientific journal, In this work, bisarsine oxides were evaluated as novel bridging ligands, aiming to develop practical and efficient luminescent lanthanide coordination polymers. We have synthesized one‐dimensional (1D) Eu3+ coordination polymers that incorporate bisarsine oxide bridging ligands and hexafluoroacetylacetonate anions. These polymers exhibited a denser packing of chains compared to analogous polymers bridged with bisphosphine oxides. The coordination polymers demonstrated exceptional thermal stability and substantial emission quantum yields. Additionally, the bisarsine oxides induced a pronounced polarization effect, facilitating a sensitive electric dipole transition that yields considerably narrow band red emission. Remarkably, the Eu3+ coordination polymers with bisarsine oxides maintained intense emission even at 550 K. A distinctive feature of these polymers is their heating‐induced emission enhancement observed when the temperature was increased from 300 K to 400 K.

Circularly polarized luminescence and high photoluminescence quantum yields from rigid 5,10-dihydroindeno[2,1-a]indene and 2,2'-dialkoxy-1,1'-binaphthyl conjugates and copolymers.
Keisuke Iwata; Makoto Tsurui; Kosuke Itaya; Naoto Hamaguchi; Yasunobu Egawa; Yuichi Kitagawa; Yasuchika Hasegawa; Hayato Tsuji
RSC advances, 14, 11, 7251, 7257, 29 Feb. 2024, [Peer-reviewed], [International Magazine]
English, Scientific journal, 5,5,10,10-Tetramethyl-5,10-dihydroindeno[2,1-a]indene (COPV1(Me)) was installed into either the 3,3'- or 6,6'-positions of chiral 2,2'-dioctyloxy-1,1'-binaphthyl to afford 2 : 1 conjugates (monomeric compounds) and 1 : 1 copolymers. These compounds showed high photoluminescence quantum yields of >0.95 whilst also exhibiting circular dichroism (CD) and circularly polarized luminescence (CPL). The dissymmetry factors of CPL (gCPL) for the 3,3'- and 6,6'-monomeric compounds in THF were 6.6 × 10-4 and 3.3 × 10-4, respectively. The 3,3'-isomer has a higher g value than the 6,6'-isomer, which was attributed to the difference in the extent of π-conjugation and the angle between electronic and magnetic transition moments. The gCPL values of the 3,3'-linked and 6,6'-linked copolymers were 1.1 × 10-3 and 6.8 × 10-4, respectively. The structural rigidity of the COPV units is beneficial to achieve relatively high g values whilst maintaining a photoluminescence quantum yield that is close to unity by using a single type of fluorophore.

Current Development of Lanthanide Complexes for Biomedical Applications.
Mengfei Wang; Yuichi Kitagawa; Yasuchika Hasegawa
Chemistry, an Asian journal, e202400038, 13 Feb. 2024, [Peer-reviewed], [Corresponding author], [International Magazine]
English, Scientific journal, Luminescent molecule-based bioimaging system is widely used for precise localization and distinction of cancer/tumor cells. Luminescent lanthanide (Ln(III)) complexes offer long-lived (sub-millisecond time scale) and sharp (FWHM <10 nm) emission, arising from the forbidden 4f-4f electronic transitions. Luminescent Ln(III) complex-based bioimaging has emerged as a promising option for both in vitro and in vivo visualizations. In this mini-review, the historical development and recent significant progress of luminescent Ln(III) probes for bioapplications are introduced. The recent studies are mainly focused on three points: (i) the structural modifications of Ln(III) complexes in both macrocyclic and small ligands, (ii) the acquirement of high resolution luminescence images of cancer/tumor cells and (iii) the constructions of ratiometric biosensors. Furthermore, our recent study is explained as a new Cancer GPS (cancer grade probing for determining tumor grade through photophysical property analyses of intracellular Eu(III) complex.

Passive Film Formed on Si-Mn Steel in Boric Acid-Borate Buffer at 6.5
Koji Fushimi; Kanta Higa; Akihiro Fujimura; Sunao Shoji; Yuichi Kitagawa; Yasuchika Hasegawa; Hideki Katayama
Journal of The Electrochemical Society, 171, 2, 021502, 021502, The Electrochemical Society, 01 Feb. 2024, [Peer-reviewed]
Scientific journal, Passivity-maintaining current of high-strength (Si-Mn) steel in boric acid-borate buffer at pH 6.5 was larger than that of ferrite/pearlite (F/P) steel. Charge transfer resistance of the Si-Mn steel surface passivated at 1.10 V vs SHE in pH 6.5 buffer was smaller than that of F/P steel surface. Nano-analyses using AES and STEM revealed the details of the structure and components of the passive film on the Si-Mn steel. The inferiorities of passivity of Si-Mn steel were suggested to be due to the alloying components and metallurgical structure to increase the strength of the steel.

Structure-changeable luminescent Eu(III) complex as a human cancer grade probing system for brain tumor diagnosis.
Mengfei Wang; Masaya Kono; Yusaku Yamaguchi; Jahidul Islam; Sunao Shoji; Yuichi Kitagawa; Koji Fushimi; Sora Watanabe; Go Matsuba; Akihisa Yamamoto; Motomu Tanaka; Masumi Tsuda; Shinya Tanaka; Yasuchika Hasegawa
Scientific reports, 14, 1, 778, 778, 22 Jan. 2024, [Peer-reviewed], [Corresponding author], [International Magazine]
English, Scientific journal, Accurate determination of human tumor malignancy is important for choosing efficient and safe therapies. Bioimaging technologies based on luminescent molecules are widely used to localize and distinguish active tumor cells. Here, we report a human cancer grade probing system (GPS) using a water-soluble and structure-changeable Eu(III) complex for the continuous detection of early human brain tumors of different malignancy grades. Time-dependent emission spectra of the Eu(III) complexes in various types of tumor cells were recorded. The radiative rate constants (kr), which depend on the geometry of the Eu(III) complex, were calculated from the emission spectra. The tendency of the kr values to vary depended on the tumor cells at different malignancy grades. Between T = 0 and T = 3 h of invasion, the kr values exhibited an increase of 4% in NHA/TS (benign grade II gliomas), 7% in NHA/TSR (malignant grade III gliomas), and 27% in NHA/TSRA (malignant grade IV gliomas). Tumor cells with high-grade malignancy exhibited a rapid upward trend in kr values. The cancer GPS employs Eu(III) emissions to provide a new diagnostic method for determining human brain tumor malignancy.

Composition Analysis of Corrosion Products on Steel by Machine Learning of Optical Microscopic Images
Yuki Tsuji; Kota Hirasawa; Sunao Shoji; Yuichi Kitagawa; Yasuchika Hasegawa; Koji Fushimi
Tetsu-to-Hagane, 2024, [Peer-reviewed]
Scientific journal

Quantitative evaluation of hydrogen absorption by detecting non-absorbed hydrogen in electrochemical hydrogen permeation test
Yuya Mizushiri; Sunao Shoji; Yuichi Kitagawa; Yasuchika Hasegawa; Koji Fushimi
International Journal of Hydrogen Energy, Elsevier BV, Jan. 2024, [Peer-reviewed]
Scientific journal

Size-Control Synthesis and Luminescence Properties of Eu(III) Coordination Particles
Masaki Enokido; Kensei Sasaki; Sunao Shoji; Mengfei Wang; Koji Fushimi; Yuichi Kitagawa; Yasuchika Hasegawa
The Journal of Physical Chemistry C, 127, 49, 23785, 23791, American Chemical Society (ACS), 01 Dec. 2023, [Peer-reviewed], [Corresponding author]
Scientific journal

Sandglass-Typed Single Chameleon Luminophore for Water Mapping Measurements: Intramolecular Energy Migrations in the Hydrophilic Tb(III)/Sm(III) Cluster
Yasuchika Hasegawa; Yuki Konishi; Masaki Enokido; Sunao Shoji; Mengfei Wang; Koji Fushimi; Yuichi Kitagawa
Inorganic Chemistry, 62, 41, 16794, 16800, American Chemical Society (ACS), 21 Sep. 2023, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Investigation of the dissolution/passivation mechanisms on Fe-Cr alloys in acidic Na2SO4 solution using online ICP-OES
Akihiro Fujimura; Sunao Shoji; Yuichi Kitagawa; Yasuchika Hasegawa; Takashi Doi; Koji Fushimi
Electrochimica Acta, 463, 142843, 142843, Elsevier BV, Sep. 2023, [Peer-reviewed]
Scientific journal

Optical Resolution of Carboxylic Acid Derivatives of Homoleptic Cyclometalated Iridium(III) Complexes via Diastereomers Formed with Chiral Auxiliaries
Azusa Kanbe; Kenta Yokoi; Yasuyuki Yamada; Makoto Tsurui; Yuichi Kitagawa; Yasuchika Hasegawa; Daiji Ogata; Junpei Yuasa; Shin Aoki
Inorganic Chemistry, 62, 29, 11325, 11341, American Chemical Society ({ACS}), 24 Jul. 2023, [Peer-reviewed]
English, Scientific journal

Thermally-assisted photosensitized emission in a trivalent terbium complex
Yuichi Kitagawa; Kaori Shima; Takuma Nakai; Marina Kumagai; Shun Omagari; Pedro Paulo Ferreira da Rosa; Sunao Shoji; Koji Fushimi; Yasuchika Hasegawa
Communications Chemistry, 6, 1, Springer Science and Business Media LLC, 22 Jun. 2023, [Peer-reviewed], [Corresponding author]
Scientific journal, Abstract

Luminescent lanthanide complexes containing effective photosensitizers are promising materials for use in displays and sensors. The photosensitizer design strategy has been studied for developing the lanthanide-based luminophores. Herein, we demonstrate a photosensitizer design using dinuclear luminescent lanthanide complex, which exhibits thermally-assisted photosensitized emission. The lanthanide complex comprised Tb(III) ions, six tetramethylheptanedionates, and phosphine oxide bridge containing a phenanthrene frameworks. The phenanthrene ligand and Tb(III) ions are the energy donor (photosensitizer) and acceptor (emission center) parts, respectively. The energy-donating level of the ligand (lowest excited triplet (T₁) level = 19,850 cm⁻¹) is lower than the emitting level of the Tb(III) ion (⁵D₄ level = 20,500 cm⁻¹). The long-lived T₁ state of the energy-donating ligands promoted an efficient thermally-assisted photosensitized emission of the Tb(III) acceptor (⁵D₄ level), resulting in a pure-green colored emission with a high photosensitized emission quantum yield (73%).

Highly efficient light harvesting of a Eu(iii) complex in a host–guest film by triplet sensitization
Shiori Miyazaki; Kenichi Goushi; Yuichi Kitagawa; Yasuchika Hasegawa; Chihaya Adachi; Kiyoshi Miyata; Ken Onda
Chemical Sciences, Royal Society of Chemistry (RSC), May 2023, [Peer-reviewed]
Scientific journal, Very high photoluminescence intensity of a Eu(iii) complex is achieved using a host–guest system. The intensity is 400 times larger than that of the Eu(iii) complex itself.

Characteristic stacked structures and luminescent properties of dinuclear lanthanide complexes with pyrene units
Takuma Nakai; Kaori Shima; Sunao Shoji; Koji Fushimi; Yasuchika Hasegawa; Yuichi Kitagawa
Frontiers in Chemistry, 11, Frontiers Media SA, 14 Apr. 2023, [Peer-reviewed]
Scientific journal, A novel design strategy of stacked organic fluorophores using dinuclear lanthanide (Ln(III)) complexes is demonstrated for the formation of excimer. The dinuclear Ln(III) complexes are composed of two Ln(III) (Eu(III) or Gd(III)) ions, six hexafluoroacetylacetonate (hfa), and two pyrene-based phosphine oxide ligands. Single-crystal analysis revealed a rigid pyrene-stacked structure via CH-F (pyrene/hfa) intramolecular interactions. The rigid aggregation structures of the two-typed organic ligands around Ln(III) resulted in high thermal stability (decomposition temperature: 340°C). The aggregated ligands exhibited excimer-type green emission from the stacked pyrene-center. The change in the Ln(III) ion promotes effective shifts of excimer emissions (Gd(III):500 nm, Eu(III):490 nm). The organic aggregation system using red-luminescent Eu(III) also provides temperature-sensitive ratiometric emission composed of π-π* and 4f-4f transitions by energy migration between aggregated ligands and Eu(III).

Initiation of Sulfide Stress Cracking Using Potentiostatic Liquid-Phase Ion Gun
K. Fushimi; H. Yanagimoto; S. Nakatsuji; S. Shoji; Y. Kitagawa; Y. Hasegawa; K. Baba
Journal of The Electrochemical Society, 170, 4, 041508, 041508, The Electrochemical Society, 01 Apr. 2023, [Peer-reviewed]
Scientific journal, A liquid-phase ion gun (LPIG) was used to create a local H₂S enriched environment near Cr-containing steel surface in Na₂S solutions in attempt to induce sulfide stress cracking on the specimen surface. In a 1.5 mM Na₂S solution, anodic polarization of LPIG Pt microelectrode at a potential of 1.90 V vs SHE resulted in that local solution was successfully acidified to below pH 4, a pseudo-sour environment. When Cr-containing steels were potentiostatically polarized under this pseudo-sour environment by LPIG, sulfides were formed on the specimen surface depending on Cr-concentration, specimen potential, and chloride ion in solution. When LPIG was operated on Cr-containing steels subjected to tensile stress using a four-point bending tester, cracks were formed on the steel surface.

Structural metamorphosis and photophysical properties of thermostable nano- and microcrystalline lanthanide polymer with flexible coordination chains
Takayuki Nakanishi; Yuichi Hirai; Jian Xu; Takashi Takeda; Shunsuke Watanabe; Atsuo Yasumori; Shou Hakamada; Yuichi Kitagawa; Yasuchika Hasegawa
Science and Technology of Advanced Materials, 24, 1, Informa UK Limited, 03 Mar. 2023, [Peer-reviewed]
Scientific journal

Bright Lanthanide ^III Triboluminescence despite Low Photoluminescence, and Dual Triboluminescence and Mechano‐Responsive Photoluminescence
Yuichi Hirai; Stann Van Baaren; Takahito Ohmura; Takayuki Nakanishi; Takashi Takeda; Yuichi Kitagawa; Yasuchika Hasegawa; Rémi Métivier; Clémence Allain
Advanced Optical Materials, 11, 9, Wiley, 08 Feb. 2023, [Peer-reviewed]
Scientific journal

Synthesis of BCP-Based Straight-Shaped Diphosphine Ligands
Hideaki Takano; Hitomi Katsuyama; Hiroki Hayashi; Miyu Harukawa; Makoto Tsurui; Sunao Shoji; Yasuchika Hasegawa; Satoshi Maeda; Tsuyoshi Mita
American Chemical Society (ACS), 12 Jan. 2023
[1.1.1]Propellane, which is structurally simple and compact, exhibits promising potential for the synthesis of disubstituted straight-shaped bicyclo[1.1.1]pentane (BCP) compounds by manipulation of its highly reactive internal C–C bond. BCPs are considered to be isosteres of 1,4-disubstituted benzenes, which have found broad applications in the areas of functional molecules and drug discovery. The internal C–C single bond of [1.1.1]propellane is regarded as a change-shift bond, which can be readily cleaved by radical or ionic means to construct BCPs. We herein report a novel synthetic method for (un)symmetric diphosphines based on the BCP motif, which can be interpreted as isosteres of 1,4-bis(diphenylphosphino)benzenes. The obtained BCP-diphosphine derivatives were used to generate a straight-shaped Au complex and a Eu-based coordination polymer.

Intensive emission of Eu(iii) β-diketonate complexes with arsine oxide ligands
Haruki Shimoji; Toshiki Fujii; Akifumi Sumida; Yuichi Kitagawa; Yasuchika Hasegawa; Hiroaki Imoto; Kensuke Naka
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), 2023
Scientific journal, Europium(iii) hexafluoroacetylacetonates incorporating arsine oxides were synthesized. Tris(1-naphthyl)arsine oxide yielded a notably more intense emission and higher thermal stability than triphenylphosphine oxide, which is conventionally used.

Enhanced circularly polarized luminescence of chiral Eu(iii) coordination polymers with structural strain
Makoto Tsurui; Yuichi Kitagawa; Sunao Shoji; Koji Fushimi; Yasuchika Hasegawa
Dalton Transactions, 52, 3, 796, 805, Royal Society of Chemistry (RSC), 2023
Scientific journal, Three types of Eu(iii) coordination polymers with distorted chiral ligands were prepared for elucidating the relationship between their structural distortions, ligand-to-metal charge transfer, and circularly polarized luminescence properties.

A switchable system between magnetic and natural circularly polarised luminescence via J-aggregation using photosynthetic antenna model compounds
T. Tomikawa; Y. Kitagawa; K. Yoshioka; K. Murata; T. Miyatake; Y. Hasegawa; K. Ishii
J. Mater. Chem. C, 11, 8, 2831, 2835, Royal Society of Chemistry (RSC), 2023, [Peer-reviewed]
English, Scientific journal, Using zinc-chlorin, the switching of MCPL/CPL via J-aggregation has been clearly demonstrated for the first time.

Luminescent Lanthanide Complexes for Effective Oxygen-Sensing and Singlet Oxygen Generation
Y. Kitagawa; T. Nakai; S. Hosoya; S. Shoji; Y. Hasegawa
ChemPlusChem, e20220045, Wiley, 2023, [Peer-reviewed]
English, Scientific journal

Controlled molecular assemblies of chiral boron dipyrromethene derivatives for circularly polarized luminescence in the red and near-infrared regions
Hayato Sakai; Yudai Suzuki; Makoto Tsurui; Yuichi Kitagawa; Takuya Nakashima; Tsuyoshi Kawai; Yuta Kondo; Go Matsuba; Yasuchika Hasegawa; Taku Hasobe
Journal of Materials Chemistry C, 11, 8, 2889, 2896, 2023, [Peer-reviewed]
English, Scientific journal

Development of a quasi-on-time ICP-OES for analyzing electrode reaction products
Akihiro Fujimura; Sunao Shoji; Yuichi Kitagawa; Yasuchika Hasegawa; Takashi Doi; Koji Fushimi
Electrochimica Acta, 433, 141246, 141246, Elsevier BV, Nov. 2022, [Peer-reviewed]
English, Scientific journal

Emission Properties of Eu(III) Complexes Containing Arsine and Phosphine Ligands with Annulated Structures
Toshiki Fujii; Yuichi Kitagawa; Yasuchika Hasegawa; Hiroaki Imoto; Kensuke Naka
Inorganic Chemistry, 61, 17662, 17672, American Chemical Society (ACS), 27 Oct. 2022, [Peer-reviewed]
English, Scientific journal

Plant growth acceleration using a transparent Eu3+-painted UV-to-red conversion film
Sunao Shoji; Hideyuki Saito; Yutaka Jitsuyama; Kotono Tomita; Qiang Haoyang; Yukiho Sakurai; Yuhei Okazaki; Kota Aikawa; Yuki Konishi; Kensei Sasaki; Koji Fushimi; Yuichi Kitagawa; Takashi Suzuki; Yasuchika Hasegawa
Scientific Reports, 12, 1, 17155, Springer Science and Business Media LLC, 26 Oct. 2022, [Peer-reviewed]
English, Scientific journal, Abstract

The stimulation of photosynthesis is a strategy for achieving sustainable plant production. Red light is useful for plant growth because it is absorbed by chlorophyll pigments, which initiate natural photosynthetic processes. Ultraviolet (UV)-to-red wavelength-converting materials are promising candidates for eco-friendly plant cultures that do not require electric power. In this study, transparent films equipped with a UV-to-red wavelength-converting luminophore, the Eu³⁺ complex, were prepared on commercially available plastic films for plant growth experiments. The present Eu³⁺-based films absorb UV light and exhibit strong red luminescence under sunlight. Eu³⁺-painted films provide significant growth acceleration with size increment and biomass production for vegetal crops and trees in a northern region. The plants cultured with Eu³⁺-painted films had a 1.2-fold height and 1.4-fold total body biomass than those cultures without the Eu³⁺ luminophores. The present film can promote the plant production in fields of agriculture and forestry.

Preparation of photonic molecular trains via soft-crystal polymerization of lanthanide complexes
Pedro Paulo Ferreira da Rosa; Yuichi Kitagawa; Sunao Shoji; Hironaga Oyama; Keisuke Imaeda; Naofumi Nakayama; Koji Fushimi; Hidehiro Uekusa; Kosei Ueno; Hitoshi Goto; Yasuchika Hasegawa
Nature Communications, 13, 1, 3660, Springer Science and Business Media LLC, Jul. 2022, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal, Abstract

Soft-crystals are defined as flexible molecular solids with highly ordered structures and have attracted attention in molecular sensing materials based on external triggers and environments. Here, we show the soft-crystal copolymerization of green-luminescent Tb(III) and yellow-luminescent Dy(III) coordination centers. Soft-crystal polymerization is achieved via transformation of monomeric dinuclear complexes and polymeric structures with respect to coordination number and geometry. The structural transformation is characterized using single-crystal and powder X-ray diffraction. The connected Tb(III) crystal-Dy(III) crystal show photon energy transfer from the Dy(III) centre to the Tb(III) centre under blue light excitation (selective Dy(III) centre excitation: 460 ± 10 nm). The activation energy of the energy transfer is estimated using the temperature-dependent emission lifetimes and emission quantum yields, and time-dependent density functional theory (B3LYP) calculations. Luminescence-conductive polymers, photonic molecular trains, are successfully prepared via soft-crystal polymerization on crystal media with remarkable long-range energy migration.

Asymmetric Lumino-Transformer: Circularly Polarized Luminescence of Chiral Eu(III) Coordination Polymer with Phase-Transition Behavior
Makoto Tsurui; Yuichi Kitagawa; Sunao Shoji; Hitomi Ohmagari; Miki Hasegawa; Masayuki Gon; Kazuo Tanaka; Masato Kobayashi; Tetsuya Taketsugu; Koji Fushimi; Yasuchika Hasegawa
The Journal of Physical Chemistry B, 126, 20, 3799, 3807, American Chemical Society (ACS), 26 May 2022, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Amorphous lanthanide complexes for organic luminescent materials
J. Hayashi; S. Shoji; Y. Kitagawa; Y. Hasegawa
Coord. Chem. Rev., 214607, May 2022, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Application of a new film for horticultural use to convert UV-light to photosynthetic active radiation
Satoshi Kitaoka; Tauro Shinano; Takashi Suzuki; Sunao Shoji; Yasuchika Hasegawa
Eurasian Journal of Forests Research, 22, 73, 77, Apr. 2022, [Peer-reviewed], [Invited]
English, Research institution

Tribo-Excited Chemical Reaction Using an EuIII Complex with a Stacked Anthracene Framework
Y. Kitagawa; A. Naito; K. Aikawa; K. Shima; S. Shoji; K. Fushimi; Y. Hasegawa
Chem. Eur. J., 28, 16, e202104401, Apr. 2022, [Peer-reviewed], [Last author]
English, Scientific journal

Luminescent Lanthanide Coordination Polymers with Transformative Energy Transfer Processes for Physical and Chemical Sensing Applications
Y. Hasegawa; Y. Kitagawa
J. Photochem. Photobio. C, Photochem. Rev., 100485, Mar. 2022, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Bright red emission with high color purity from Eu(III)complexes with Pai-cinjugated polycyclic aromatic loigands and their sensing applications
Y. Kitagawa; M. Tsurui; Y. Hasegawa
RSC Adv., 12, 810, 821, Feb. 2022, [Peer-reviewed], [Last author]
English, Scientific journal

Luminescent Eu(III)-based Coordination Polymers for Photonic Materials
Y. Hasegawa; S. Shoji; Y. Kitagawa
Chem. Lett., 51, 185, 196, Feb. 2022, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Tribo-Excited Chemical Reaction Using an Eu^III Complex with a Stacked Anthracene Framework
Kitagawa, Y.; Naito, A.; Aikawa, K.; Shima, K.; Shoji, S.; Fushimi, K.; Hasegawa, Y.
Chemistry (Weinheim an der Bergstrasse, Germany), 28, 16, 2022
Scientific journal

Effective Photosensitization in Excited‐State Equilibrium: Brilliant Luminescence of Tb ^III Coordination Polymers Through Ancillary Ligand Modifications
Yuichi Kitagawa; Ryoma Moriake; Tomoko Akama; Koki Saito; Kota Aikawa; Sunao Shoji; Koji Fushimi; Masato Kobayashi; Tetsuya Taketsugu; Yasuchika Hasegawa
ChemPlusChem, e202200151, Wiley, 2022, [Peer-reviewed]
English, Scientific journal

Charge-transfer excited states of π- and 4f-orbitals for development of luminescent Eu(III) complexes
Y. Kitagawa; P.-P. Ferreira da Rosa; Y. Hasegawa
Dalton Trans., 50, 14978, 14984, Sep. 2021, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Hybrid Eu(III) Coordination luminophore Standing on Silica Nanoparticles By Two Legs for Enhanced Luminescence
T. Zhang; Y. Kitagawa; R. Moriake; P. P. Ferreira da Rosa; Md J. Islam; T. Yoneda; Y. Inokuma; K. Fushimi; Y. Hasegawa
Chem. Eur. J., in press, Sep. 2021, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Long-lived emission beyond 1000 nm: control of excited-state dynamics in a dinuclear Tb(III)-Nd(III) complex
Y. Kitagawa; K. Matsuda; P. P. Ferreira da Rosa; K. Fushimi; Y. Hasegawa
Chem. Comm., 57, 65, 8047, 8050, Jul. 2021, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Drastic Enhancement of Photosensitized Energy Transfer Efficiency of a Eu(III) Complex Driven by Arsenic
Toshiki Fujii; Yuichi Kitagawa; Yasuchika Hasegawa; Hiroaki Imoto; Kensuke Naka
Inorganic Chemistry, 60, 12, 8605, 8612, American Chemical Society (ACS), 21 Jun. 2021
Scientific journal

Active-passive transition of an fe-6 mass% cr surface in acidic sodium sulfate solutions under a laminar flow condition evaluated by ellipso-microscopy and channel flow electrode method
Akihiro Fujimura; Yuichi Kitagawa; Yasuchika Hasegawa; Takashi Doi; Koji Fushimi
Journal of the Electrochemical Society, 168, 5, May 2021
Scientific journal

Isopyrazole-Masked Tetraketone: Tautomerism and Functionalization for Fluorescent Metal Ligands
H. Shirakura; Y. Manabe; C. Kasai; Y. Inaba; M. Tsurui; Y. Kitagawa; Y. Hasegawa; T. Yoneda; Y. Ide; Y. Inokluma
Eur. J. Inorg. Chem., 4345, 4349, May 2021, [Peer-reviewed]
English, Scientific journal

Amide-bridged Eu(III) coordination polymer for stable luminescent glass material
J. Hayashi; S. Shoji; Y. Kitagawa; K. Fushimi; Y. Hasegawa
Mater. Lett., 297, 130012, May 2021, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Strong circularly polarized luminescence of mixed lanthanide coordination polymers with control of 4f electronic structur
Md Jahidal Islam; Y. Kitagawa; S. Tsurui; K. Fushimi; Y. Hasegaw
Dalton Trans, 50, 5433, 5436, May 2021, [Peer-reviewed], [Corresponding author]
English, Scientific journal

Thermo-Sensitive EuIII Coordination Polymers with Amorphous Networks
Y. Hasegawa; N. Sato; J. Hayashi; Y. Kitagawa; K. Fushimi
ChemistrySelect, 6, 2812, 2816, Apr. 2021, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Long-wavelength visible to near infrared photoluminescence from carbon-bridged styrylstilbene and thiadiazole conjugates in organic and aqueous media
Takeru Inoue; Makoto Tsurui; Hiroshi Yamagishi; Yuma Nakazawa; Naoto Hamaguchi; Shoya Watanabe; Yuichi Kitagawa; Yasuchika Hasegawa; Yohei Yamamoto; Hayato Tsuji
RSC Advances, 11, 11, 6008, 6013, Royal Society of Chemistry (RSC), Mar. 2021, [Peer-reviewed]
Scientific journal,

Efficient long-wavelength visible to NIR-emitting materials have been synthesized by use of rigid planar styrylstilbene as a donor component.

Bright sky-blue fluorescence with high color purity: assembly of luminescent diphenyl-anthracene lutetium-based coordination polymer
Yuichi Kitagawa; Ayu Naito; Koji Fushimi; Yasuchika Hasegawa
RSC Advances, 11, 12, 6604, 6606, Royal Society of Chemistry (RSC), Mar. 2021, [Peer-reviewed]
Scientific journal

First Tribo‐Excited Chemical Reaction of a Stacked Lanthanide Coordination Polymer with an in Situ Reaction Monitor
Yuichi Kitagawa; Ayu Naito; Koji Fushimi; Yasuchika Hasegawa
Chemistry – A European Journal, 27, 7, 2279, 2283, Wiley, Feb. 2021, [Peer-reviewed]
Scientific journal

Coordination Geometrical Effect on Ligand-to-Metal Charge Transfer-Dependent Energy Transfer Processes of Luminescent Eu(III) Complexes
Pedro Paulo Ferreira da Rosa; Shiori Miyazaki; Haruna Sakamoto; Yuichi Kitagawa; Kiyoshi Miyata; Tomoko Akama; Masato Kobayashi; Koji Fushimi; Ken Onda; Tetsuya Taketsugu; Yasuchika Hasegawa
The Journal of Physical Chemistry A, 125, 1, 209, 217, American Chemical Society (ACS), 14 Jan. 2021, [Peer-reviewed]
Scientific journal

Long‐Range LMCT Coupling in Eu III Coordination Polymers for an Effective Molecular Luminescent Thermometer**
Yuichi Kitagawa; Marina Kumagai; Pedro Paulo Ferreira da Rosa; Koji Fushimi; Yasuchika Hasegawa
Chemistry – A European Journal, 27, 1, 264, 269, Wiley, 04 Jan. 2021, [Peer-reviewed]
Scientific journal

<i>In-situ</i> Observation of Corrosion Initiation Occurring on NaCl Nanoparticles-deposited Carbon Steel Surfaces
Koji Fushimi; Haruka Okuyama; Kai Ohshimizu; Sunao Shoji; Yuichi Kitagawa; Yasuchika Hasegawa
Tetsu-to-Hagane, 107, 12, 1011, 1019, Iron and Steel Institute of Japan, 2021
Scientific journal

Photolithographic fabrication of a micro-electrode surface on a carbon steel sheet for local hydrogen permeation measurements
Fushimi Koji; Ishii Nozomi; Nakajima Ayako; Kitagawa Yuichi; Hasegawa Yasuchika; Matsuo Yasutaka
ISIJ International, 61, 4, 1112, 1119, 2021
Scientific journal

Rapid method to measure hydrogen diffusion coefficient in metal using a multi-sine wave signal
Yamamoto Yudai; Kitagawa Yuichi; Hasegawa Yasuchika; Fushimi Koji
ISIJ International, 61, 4, 1064, 1070, 2021
Scientific journal

An Europium (III) Luminophore with Pressure-Sensing Units: Effective Back Energy Transfer in Coordination Polymers with Hexadentate Porous Stable Networks
Y. Hasegawa; T. Sawanobori; Y. Kitagawa; S. Shoji; K. Fushimi; Y. Nakadaka; T. Masuda; I. Hisaki
ChemPlusChem., 85, 9, 1989, 1993, Dec. 2020, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal, A luminescent EuIII coordination polymer with O2 -sensing units under air, EuIII -hcpt (hcpt: 2,3,6,7,10,11-hexakis(4-carboxy-phenyl)triphenylene), is reported. The hexadentate carboxylic acids in hcpt ligands play an important role in the formation of tight-packed three-dimensional networks in EuIII -hcpt, giving hyper thermo-stable structures (decomposition temperature=420 °C). The three-dimensional porous network promotes bright luminescence (4f-4f emission quantum yield=70 %). The emission lifetime of EuIII -hcpt under vacuum (0.86 ms) was twice as large as that under O2 (0.48 ms, 1 atom:101.3 kPa). The Arrhenius analysis of the emission decay profile indicates that the back energy transfer (BEnT) from the emitting level of the europium(III) ion to the excited T1 state of the hcpt ligand should be activated at room temperature. The gradual decrease of emission lifetime is caused by the BEnT process in EuIII -hcpt. Finally, an advanced pressure-sensitive luminophore is demonstrated.

Circularly polarized absorption and luminescence of semiconductor Eu-OCN nanocrystals in blue light region
Y. Hasegawa; K. Koide; M. Tsurui; Y. Kitagawa; T. Nakanishi; Y. Doi; Y. Hinatsu; K. Fushimi
ChemPhysChem, 21, 2019, 2024, Dec. 2020, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Dual Energy Transfer Pathways from an Antenna Ligand to Lanthanide Ion in Trivalent Europium Complexes through Phosphine-Oxide Bridges
S. Miyazaki; K. Miyata; H. Sakamoto; F. Suzue; Y. Kitagawa; Y. Hasegawa; K. Onda
J. Phys. Chem. A, 124, 6601, 6606, Dec. 2020, [Peer-reviewed]
Scientific journal

Chiral lanthanide lumino-glass for a circularly polarized light security device
Y. Kitagawa; S. Wada; MD J. Islam; K. Saita; M. Gon; K. Fushimi; K. Tanaka; S. Maeda; Y. Hasegawa
Communications Chemistry, 3, 1, 119, Dec. 2020, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Stacked nanocarbon photosensitizer for efficient blue light excited Eu(III) emission
Yuichi Kitagawa; Fumiya Suzue; Takayuki Nakanishi; Koji Fushimi; Tomohiro Seki; Hajime Ito; Yasuchika Hasegawa
Communications Chemistry, 3, 1, 3, 01 Dec. 2020, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Effect of intentional convection on the passivity of an Fe–6Cr surface in pH 4.5 Na2SO4 solution
K. Fushimi; T. Kanazawa; A. Fujimura; Y. Kitagawa; Y. Hasegawa; T. Doi
Electrochimica Acta, 346, 136237, 136237, Elsevier BV, Jun. 2020, [Peer-reviewed]
Scientific journal

Electronic strain effect on Eu(iii) complexes for enhanced circularly polarized luminescence
Makoto Tsurui; Yuichi Kitagawa; Koji Fushimi; Masayuki Gon; Kazuo Tanaka; Yasuchika Hasegawa
Dalton Trans., 49, 5352, 5361, 07 Apr. 2020, [Peer-reviewed], [International Magazine]
English, Luminescent Eu(iii) complexes with point-chiral phosphine oxide ligands, [Eu(hfa)3((R,R)-B2QPO)] (hfa: hexafluoroacetylacetonato, B2QPO: 2,3-bis(tert-butylmethylphosphine oxide)quinoxaline) and [Eu(hfa)3((R)-B3QPO)] (B3QPO: 2-tert-butylmethylphosphine oxide-3-(di-tert-butylphosphineoxide)quinoxaline), are reported for the investigation of the electronic strain effect on the coordination sphere. Single crystal X-ray crystallography reveals the strong structural strain of the hfa ligands in [Eu(hfa)3((R,R)-B2QPO)]. The emission quantum yields of [Eu(hfa)3((R,R)-B2QPO)] in solution (55%) and solid (63%) are comparable to those of previously reported bright luminescent Eu(iii) complexes. The chiroptical properties of [Eu(hfa)3((R,R)-B2QPO)] and [Eu(hfa)3((R)-B3QPO)] were characterized using circular dichroism (CD) and circularly polarized luminescence (CPL) spectra. The dissymmetry factor of [Eu(hfa)3((R,R)-B2QPO)] was estimated to be 0.08. The chiroptical phenomena of the Eu(iii) complexes are closely related to their structural (geometry) and electronic (LMCT: ligand-to-metal charge transfer) strains.

First demonstration of the π-f orbital interaction depending on the coordination geometry in Eu(iii) luminophores.
Yuichi Kitagawa; Marina Kumagai; P P Ferreira da Rosa; Koji Fushimi; Yasuchika Hasegawa
Dalton transactions (Cambridge, England : 2003), 49, 10, 3098, 3101, 09 Mar. 2020, [Peer-reviewed], [Last author, Corresponding author], [International Magazine]
English, Scientific journal, Herein, the π-f orbital interaction depending on the coordination geometry in the Eu(iii) complex is demonstrated. Thermal analysis and computational calculations showed the phase transition of the Eu(iii) complex based on the change in the coordination geometry. A red-shifted LMCT band and radiative rate changes associated with the phase transition were found in the Eu(iii) complex.

The Role of π-f Orbital Interactions in Eu(III) Complexes for an Effective Molecular Luminescent Thermometer.
Yuichi Kitagawa; Marina Kumagai; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
Inorganic chemistry, 59, 5865, 5871, 06 Mar. 2020, [Peer-reviewed], [Last author, Corresponding author], [International Magazine]
English, Scientific journal, Luminescent Eu(III) complexes with a ligand-to-metal charge transfer (LMCT) state were demonstrated for the development of a molecular thermometer. The Eu(III) complex was composed of three anionic ligands (hfa: hexafluoroacetylacetonate) and a phosphine oxide derivative containing a chrysene framework (diphenylphosphorylchrysene (DPCO)). The chrysene framework induced a rigid coordination structure via intermolecular interactions, resulting in a high thermal stability (decomposition point: 280 °C). The Eu(III) complex also exhibited an extremely high molar absorption coefficient (490000 cm-1 M-1), high intrinsic emission quantum yields (73%), and temperature-dependent energy migration between ligands and Eu(III) ion. The characteristic energy migration system was explained by the presence of the LMCT state based on π-f orbital interactions.

Steric and Electronic Control of Chiral Eu(III) Complexes for Effective Circularly Polarized Luminescence.
Yuichi Kitagawa; Makoto Tsurui; Yasuchika Hasegawa
ACS omega, 5, 8, 3786, 3791, 03 Mar. 2020, [Peer-reviewed], [Invited], [Last author, Corresponding author], [International Magazine]
English, Scientific journal, Circularly polarized luminescence (CPL) is characterized by the differential emission of right and left circularly polarized light by a chiral molecule. This mini-review describes the recent developments in chiral trivalent europium (Eu(III)) complexes with effective CPL. CPL has many potential applications in security tags, lasers, and three-dimensional organic electroluminescence devices, which is one of the most intensely investigated topics in molecular luminophores. Eu(III) complexes have attracted considerable attention as effective CPL luminophores for the above-mentioned applications. In this review, recent studies on the Eu(III) CPL, including the steric (dimer, tetramer, aggregates, and coordination polymers) and electronic control (mononuclear) of Eu(III) complexes for the construction of a luminophore with effective CPL, are discussed. The characteristic CPL applications employing the chiral mononuclear Eu(III) complexes are also described. Chiral Eu(III) complexes with well-designed organic ligands can result in the establishment of new research areas in the fields of photochemistry and materials science.

First aggregation-induced emission of a Tb(iii) luminophore based on modulation of ligand-ligand charge transfer bands.
Yuichi Kitagawa; Marina Kumagai; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
Dalton transactions (Cambridge, England : 2003), 49, 8, 2431, 2436, 25 Feb. 2020, [Peer-reviewed], [Last author, Corresponding author], [International Magazine]
English, Scientific journal, Herein the aggregation-induced emission (AIE) of a Tb(iii) complex is reported for the first time. The Tb(iii) complex is composed of three anionic ligands (acac: acetylacetonate) and one large hetero-π-conjugated neutral ligand (dpq: dipyrido[3,2-f:2',3'-h]quinoxaline). The formation of a crystalline J-aggregate of the Tb(iii) complex (CJ-Tb(iii)) was characterized by X-ray crystal structure analysis and absorption spectra. A crystalline H-aggregate (CH-Tb(iii)) was also prepared using the ligand steric effect (tmh: 2,2,6,6-tetramethyl-3,5-heptanedionate). The emission and AIE properties of CJ-Tb(iii) were evaluated using emission spectra, lifetime, and quantum yields, whereas CH-Tb(iii) did not emit photons. Density functional theory calculations predict that the AIE originates from the modulation of ligand-to-ligand charge transfer bands through J-aggregation.

Aggregation-induced emission of a Eu(III) complex via ligand-to-metal charge transfer
Yuichi Kitagawa; Marina Kumagai; Koji Fushimia; Yasuchika Hasegawa
Chemical Physics Letters, 749, 137437, 137437, Elsevier BV, 2020, [Peer-reviewed]
Scientific journal

Dithieno[3,4-b:3′,4′-d]arsole: A Novel Class of Hetero[5]radialenes
Aya Urushizaki; Takashi Yumura; Yuichi Kitagawa; Yasuchika Hasegawa; Hiroaki Imoto; Kensuke Naka
Eur. J. Org. Chem., 2020, [Peer-reviewed]

Characteristic Evaluation of Chameleon Luminophore Dispersed in Polymer
M. Kasai; Y. Sugioka; M. Yamamoto; T. Nagata; T. Nonomura; K. Asai; Y. Hasegawa
Sensors, 20, 2623, s20092623, 2623, 2020, [Peer-reviewed]
Scientific journal

Splitting and Reorientation of π-Conjugation by an Unprecedented Photo-Rearrangement Reaction
Yuya Inaba; Tomoki Yoneda; Yuichi Kitagawa; Kiyoshi Miyata; Yasuchika Hasegawa; Yasuhide Inokuma
CHEMICAL COMMUNICATIONS, 56, 3, 348, 351, 2020, [Peer-reviewed]
English, Scientific journal

Luminescent Coordination Polymers Constructed from Flexible, Tetradentate Diisopyrazole Ligand and Copper(I) Halides
Tomoki Yoneda; Chika Kasai; Yumehiro Manabe; Makoto Tsurui; Yuichi Kitagawa; Yasuchika Hasegawa; Parantap Sarkar; Yasuhide Inokuma
Chemistry–An Asian Journal, 15, 5, 601, 605, 2020, [Peer-reviewed]
English, Scientific journal

Luminescent lanthanide complex with seven-coordination geometry
P.-P. Ferreira da Rosa, Y. Kitagawa, Y. Hasegawa
Coordination Chemistry Reviews, 213153, 2020, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Olefin-accelerated solid-state C–N cross-coupling reactions using mechanochemistry
Hajime Ito; Koji Kubota; Tamae Seo; Katsumasa Koide; Yasuchika Hasegawa; Hajime Ito
Nature Communications, 10, 1, doi.org/10.1038/s41467-018-080, Springer Science and Business Media {LLC}, Dec. 2019, [Peer-reviewed]
English, Scientific journal

Near-IR Luminescent Yb^III Coordination Polymers Composed of Pyrene Derivatives for Thermostable Oxygen Sensors
Yasuchika Hasegawa; Takafumi Matsui; Yuichi Kitagawa; Takayuki Nakanishi; Tomohiro Seki; Hajime Ito; Yuta Nakasaka; Takao Masuda; Koji Fushimi
Chemistry - A European Journal, 25, 53, 12308, 12315, 20 Sep. 2019, [Peer-reviewed]
English, Scientific journal

Thermo-sensitive luminescence of lanthanide complexes, clusters, coordination polymers and metal-organic frameworks with organic photosensitizers
Hasegawa Yasuchika; Kitagawa Yuichi
JOURNAL OF MATERIALS CHEMISTRY C, 7, 25, 7494, 7511, 07 Jul. 2019, [Peer-reviewed]

Perfluorophenyl-Directed Giant Porphyrin J-Aggregates
Mitsuhiko Morisue; Ikuya Ueno; Kunihiko Muraoka; Shun Omagari; Takayuki Nakanishi; Yasuchika Hasegawa; Takaaki Hikima; Sono Sasaki
Chemistry - A European Journal, 25, 30, 7322, 7329, 28 May 2019, [Peer-reviewed]
English, Scientific journal

Photoluminescence Properties of [Core+ exo]-Type Au6 Clusters: Insights into the Effect of Ligand Environments on the Excitation Dynamics
Yukatsu Shichibu; Mingzhe Zhang; Takeshi Iwasa; Yuriko Ono; Tetsuya Taketsugu; Shun Omagari; Takayuki Nakanishi; Yasuchika Hasegawa; Katsuaki Konishi
Journal of Physical Chemistry C, 123, 11, 6934, 6939, 21 Mar. 2019, [Peer-reviewed]
English, Scientific journal

価数制御した希土類ナノ結晶の発光特性評価
岩本 真帆; 神田 翔太; 川島 祥; 宮部 豪人; 長谷川 靖哉; 甲谷 繁
日本薬学会年会要旨集, 139年会, 2, 253, 253, (公社)日本薬学会, Mar. 2019
Japanese

Hydrogen permeation into a carbon steel sheet observed by a micro-capillary combined with a devanathan-stachurski cell
Koji Fushimi; Misako Jin; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 105, 1, 64, 68, Jan. 2019, [Peer-reviewed]
Scientific journal

Evaluation of Zn2+ Coordination Structures in Chiral Zn2+ Complexes Based on Shape Measurement Factors: Relationships between Catalytic Activity and the Coordination Structure
S. Aoki, Y. Kitagawa, Y. Hasegawa, S. Sonoike, Y. Saga, M. Hatanaka
Eur. J. Inorg. Chem., 2019, 44, 4740, 4751, Wiley, 2019, [Peer-reviewed]
English, Scientific journal

Thermal and crystallographic investigation of luminescent Eu(III) coordination polymers with dithiane and dioxane hexyl rings
Y. Hirai, P. P. Ferreira da Rosa, Y. Kitagawa, Y. Hasegawa
Chem. Lett., 48, 1544, 1546, 2019, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Lifetimes of lanthanide(III) Triboluminescence Excited by Aerodynamic Shock Waves
Y. Hirai, A. Kotani, H. Sakaue, Y. Kitagawa, Y. Hasegawa
J. Phys. Chem. C, 123, 27251, 27256, 2019, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Micro- and nano-scopic aspects of passive surface on pearlite structure of carbon steel in pH 8.4 boric acid-borate buffer
Koji Fushimi; Ryogo Nakagawa; Yuichi Kitagawa; Yasuchika Hasegawa
J. Electrochem. Soc., 166, C3409, C3416, 2019, [Peer-reviewed]
English, Scientific journal

Luminescent Lanthanide Complexes, Clusters, Coordination Polymers and Metal-organic Frameworks with Temperature-sensing properties
Y. Hasegawa; Y. Kitagawa
J. Mater. Chem. C., 7, 7494, 7511, 2019, [Peer-reviewed]
English, Scientific journal

Photophysical investigation of near infrared emitting lanthanoid complexes incorporating tris (2-naphthoyl)methane as a new antenna ligand
La. A. Galán; S. Wada; L. Cameron; A. N. Sobolev; Y. Hasegawa; E. Zysman-Colman; M. I. Ogden; M. Massi
Dalton Trans., 48, 3768, 3776, 2019, [Peer-reviewed]
English, Scientific journal

Visualization of icing of supercooled water using Tb(III)-basedtemperature-sensitive paint
Y. Hirai; A. Mallette; Y. Nishio; W. Patterson; Y. Hasegawa; H. Sakaue
Sensors and Actuators: A. Physical, 285, 599, 602, 2019, [Peer-reviewed]
English, Scientific journal

Structural Manipulation of Triboluminescent Lanthanide Coordination Polymers by Side-Group Alteration
Hajime Ito; Yuichi Hirai; Pedro Paulo Ferreira da Rosa; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Tomohiro Seki; Hajime Ito; Yasuchika Hasegawa
Inorganic Chemistry, 58, 14653, 14659, American Chemical Society ({ACS}), 03 Dec. 2018, [Peer-reviewed]
English, Scientific journal

Ligand-Assisted Back Energy Transfer in Luminescent Tb-III Complexes for Thermosensing Properties
Yamamoto, Masanori; Kitagawa, Yuichi; Nakanishi, Takayuki; Fushimi, Koji; Hasegawa, Yasuchika
CHEMISTRY-A EUROPEAN JOURNAL, 24, 67, 17719, 17726, Dec. 2018, [Peer-reviewed]
English, Scientific journal

Electronic chirality inversion of lanthanide complex induced by achiral molecules
Wada, Satoshi; Kitagawa, Yuichi; Nakanishi, Takayuki; Gon, Masayuki; Tanaka, Kazuo; Fushimi, Koji; Chujo, Yoshiki; Hasegawa, Yasuchika
SCIENTIFIC REPORTS, 8, 16395, Nov. 2018, [Peer-reviewed]
English, Scientific journal

Spin-orbit coupling dependent energy transfer in luminescent nonanuclear Yb-Gd / Yb-Lu clusters
Shun Omagari; Takayuki Nakanishi; Yuichi Kitagawa; Tomohiro Seki; Koji Fushimi; Hajime Ito; Andries Meijerink; Yasuchika Hasegawa
Journal of Luminescence, 201, 170, 175, Sep. 2018, [Peer-reviewed]
English, Scientific journal

Red Luminescent Eu(III) Coordination Bricks Excited on Blue LED Chip
Toru Koizuka; Kei Yanagisawa; Yuichi Hirai; Yuichi Kitagawa; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
Inorganic Chemistry, 57, 12, 7097, 7103, American Chemical Society, 18 Jun. 2018, [Peer-reviewed]
English, Scientific journal

Thermosensitive Seven-Coordinate TbIII Complexes with LLCT Transitions
Pedro Paulo Ferreira da Rosa; Takayuki Nakanishi; Yuichi Kitagawa; Tomohiro Seki; Hajime Ito; Koji Fushimi; Yasuchika Hasegawa
European Journal of Inorganic Chemistry, 2018, 19, 2031, 2037, Wiley-VCH Verlag, 24 May 2018, [Peer-reviewed]
English, Scientific journal

Effective Europium Coordination Luminophores Linked with Bi- and Tridentate Carbazole Phosphine Oxides for Organic Electroluminescent Devices
Yasuchika Hasegawa; Shiori Natori; Jun Fukudome; Takashi Nagase; Takashi Kobayashi; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Hiroyoshi Naito
Journal of Physical Chemistry C, 122, 17, 9599, 9605, 03 May 2018, [Peer-reviewed]
English, Scientific journal

Solid-State and Nanoparticle Synthesis of EuSxSe1-x Solid Solutions
Haydee A. Dalafu; Nicholas Rosa; Derak James; Dane Romar C. Asuigui; Michael McNamara; Akira Kawashima; Shun Omagari; Takayuki Nakanish; Yasuchika Hasegawa; Sarah L. Stoll
CHEMISTRY OF MATERIALS, 30, 9, 2954, 2964, May 2018, [Peer-reviewed]
English, Scientific journal

An Estimation Method of Metal-Ligand Orbital Mixing in Lanthanide(III) Complexes Using Magnetic Circular Dichroism
Yuichi Kitagawa; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
ChemistrySelect, 3, 9, 2646, 2648, Wiley-Blackwell, 07 Mar. 2018, [Peer-reviewed]
English, Scientific journal

A Luminescent Dinuclear EuIII/TbIII Complex with LMCT Band as a Single-Molecular Thermosensor
Kei Yanagisawa; Yuichi Kitagawa; Takayuki Nakanishi; Tomohiro Seki; Koji Fushimi; Hajime Ito; Yasuchika Hasegawa
Chemistry - A European Journal, 24, 8, 1956, 1961, Wiley-VCH Verlag, 06 Feb. 2018, [Peer-reviewed]
English, Scientific journal

Origin of Concentration Quenching in Ytterbium Coordination Polymers: Phonon-Assisted Energy Transfer
Shun Omagari; Takayuki Nakanishi; Yuichi Hirai; Yuichi Kitagawa; Tomohiro Seki; Koji Fushimi; Hajime Ito; Yasuchika Hasegawa
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 5, 561, 567, Feb. 2018, [Peer-reviewed]
English, Scientific journal

Three-dimensional coordination polymers composed of luminescent lanthanide element blocks
Hasegawa, Y.; Nakanishi, T.; Kitagawa, Y.
New Polymeric Materials Based on Element-Blocks, 2018
Scientific journal

Synthesis and photophysical properties of Eu(III) complexes with phosphine oxide ligands including metal ions
Masanori Yamamoto; Takayuki Nakanishi; Yuichi Kitagawa; Tomohiro Seki; Hajime Ito; Koji Fushimi; Yasuchika Hasegawa
Bulletin of the Chemical Society of Japan, 91, 1, 6, 11, Chemical Society of Japan, 2018, [Peer-reviewed]
English, Scientific journal

Highly luminescent tetranuclear Eu(III) complex with characteristic cavity Space
T. Koizuka; Y. Kitagawa; T. Nakanishi; K. Fushimi; Y. Hasegawa
Inorg. Chim. Acta, 486, 240, 244, 2018, [Peer-reviewed]
English, Scientific journal

Time-dependent measurement of hydrogen penetration into iron sheets from borate buffer solution using FFT analysis
Yudai Yamamoto; Yuichi Kitagawa; Yasuchika Hasegawa; Koji Fushimi
J. Electrochem. Soc., 165, 13, C900, C906, 2018, [Peer-reviewed]
English, Scientific journal

Chiral α-Hydroxy Acid-Coadsorbed TiO2 Photocatalysts for Asymmetric Induction in Hydrogenation of Aromatic Ketones
S. Kohtani; A. Kawashima; F. Masuda; M. Sumi; Y. Kitagawa; E. Yoshioka; Y. Hasegawa; H. Miyabe
Chem. Comm., 54, 12610, 12613, 2018, [Peer-reviewed]
English, Scientific journal

Liquid-Phase Ion Gun for Local Acidification of Na2S Aqueous Solution and Local Sulfidation of Fe-Cr Alloy Surface
K. Fushimi; S. Nakatsuji; J. Lee; Y. Kitagawa; T. Nakanishi; Y. Hasegawa; K. Baba; S. Tsuri
J. Electrochem. Soc., 165, C618, C623, 2018, [Peer-reviewed]
English, Scientific journal

Asymmetric color-changeable luminophore with donor-acceptor-donor structure for solvent and temperature sensitive properties
Y. Kitagawa; R.Yachi; T. Nakanishi; K. Fushimi; Y. Hasegawa
ChemistrySelect, 39, 10905, 10908, 2018, [Peer-reviewed]
English, Scientific journal

Spiral Eu(III) Coordination Polymers with Circularly Polarized Luminescence
Y. Hasegawa; Y. Miura; Y. Kitagawa; S. Wada; T. Nakanishi; K. Fushimi; T. Seki; H. Ito; T. Iwasa; T. Taketsugu; M. Gon; K. Tanaka; Y. Chujo; S. Hattori; M. Karasawa; K. Ishii
Chem. Comm., 54, 10695, 10697, 2018, [Peer-reviewed]
English, Scientific journal

A highly luminescent Eu(iii) complex based on an electronically isolated aromatic ring system with ultralong lifetime
Yuichi Kitagawa; Fumiya Suzue; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
Dalton Transactions, 47, 21, 7327, 7332, Royal Society of Chemistry, 2018, [Peer-reviewed]
English, Scientific journal

Fully Conjugated Porphyrin Glass: Collective Light-Harvesting Antenna for Near-Infrared Fluorescence beyond 1 μm
Mitsuhiko Morisue; Shun Omagari; Ikuya Ueno; Takayuki Nakanishi; Yasuchika Hasegawa; Shunsuke Yamamoto; Jun Matsui; Sono Sasaki; Takaaki Hikima; Shinichi Sakurai
ACS Omega, 3, 4, 4466, 4474, American Chemical Society, 2018, [Peer-reviewed]
English, Scientific journal

Effective Photo-, Electro- and Mechano-sensitized Luminescence of Lanthanide Complexes
Y. Hasegawa; Y. Kitagawa; T. Nakanishi
NPG Asia Mater., 10, 52, 70, 2018, [Peer-reviewed], [Invited]
English, Scientific journal

Photosensitized Luminescence of Highly Thermostable Mononuclear Eu(III) Complexes with pi-Expanded beta-Diketonate Ligands
Toru Koizuka; Masanori Yamamoto; Yuichi Kitagawa; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 90, 12, 1287, 1292, Dec. 2017, [Peer-reviewed]
English, Scientific journal

Enhanced Luminescence of Asymmetrical Seven-Coordinate Eu-III Complexes Including LMCT Perturbation
Kei Yanagisawa; Yuichi Kitagawa; Takayuki Nakanishi; Tomoko Akama; Masato Kobayashi; Tomohiro Seki; Koji Fushimi; Hajime Ito; Tetsuya Taketsugu; Yasuchika Hasegawa
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 32, 3843, 3848, Sep. 2017, [Peer-reviewed]
English, Scientific journal

J-Type Heteroexciton Coupling Effect on an Asymmetric Donor-Acceptor-Donor-Type Fluorophore
Yuichi Kitagawa; Ryuto Yachi; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
JOURNAL OF PHYSICAL CHEMISTRY A, 121, 24, 4613, 4618, Jun. 2017, [Peer-reviewed]
English, Scientific journal

Triboluminescence of Lanthanide Coordination Polymers with Face-to-Face Arranged Substituents
Yuichi Hirai; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Tomohiro Seki; Hajime Ito; Yasuchika Hasegawa
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 56, 25, 7171, 7175, Jun. 2017, [Peer-reviewed]
English, Scientific journal

Luminescent Mechanochromic 9-Anthryl Gold(I) Isocyanide Complex with an Emission Maximum at 900 nm after Mechanical Stimulation
Tomohiro Seki; Noriaki Tokodai; Shun Omagari; Takayuki Nakanishi; Yasuchika Hasegawa; Takeshi Iwasa; Tetsuya Taketsugu; Hajime Ito
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 139, 19, 6514, 6517, May 2017, [Peer-reviewed]
English, Scientific journal

Eu(III) Chiral Coordination Polymer with a Structural Transformation System
Naoyuki Koiso; Yuichi Kitagawa; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
INORGANIC CHEMISTRY, 56, 10, 5741, 5747, May 2017, [Peer-reviewed]
English, Scientific journal

Solvent-dependent dual-luminescence properties of a europium complex with helical pi-conjugated ligands
Yuichi Kitagawa; Ryohsuke Ohno; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 16, 5, 683, 689, May 2017, [Peer-reviewed]
English, Scientific journal

Supramolecular Polymer of Near-Infrared Luminescent Porphyrin Glass
Mitsuhiko Morisue; Yuki Hoshino; Masaki Shimizu; Takayuki Nakanishi; Yasuchika Hasegawa; Md Amran Hossain; Shinichi Sakurai; Sono Sasaki; Shinobu Uemura; Jun Matsui
MACROMOLECULES, 50, 8, 3186, 3192, Apr. 2017, [Peer-reviewed]
English, Scientific journal

Development of Ion-Conductive and Vapoluminescent Porous Coordination Polymers Composed of Ruthenium(II) Metalloligand
Ayako Watanabe; Atsushi Kobayashi; Erika Saitoh; Yuki Nagao; Shun Omagari; Takayuki Nakanishi; Yasuchika Hasegawa; W. M. C. Sameera; Masaki Yoshida; Masako Kato
INORGANIC CHEMISTRY, 56, 5, 3005, 3013, Mar. 2017, [Peer-reviewed]
English, Scientific journal

Amorphous Formability and Temperature-Sensitive Luminescence of Lanthanide Coordination Glasses Linked by Thienyl, Naphthyl, and Phenyl Bridges with Ethynyl Groups
Yuichi Hirai; Pedro Paulo Ferreira da Rosa; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Yasuchika Hasegawa
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 90, 3, 322, 326, Mar. 2017, [Peer-reviewed]
English, Scientific journal

Effective Photo- and Triboluminescent Europium(III) Coordination Polymers with Rigid Triangular Spacer Ligands
Yasuchika Hasegawa; Shiori Tateno; Masanori Yamamoto; Takayuki Nakanishi; Yuichi Kitagawa; Tomohiro Seki; Hajime Ito; Koji Fushimi
CHEMISTRY-A EUROPEAN JOURNAL, 23, 11, 2666, 2672, Feb. 2017, [Peer-reviewed]
English, Scientific journal

Time-dependent measurement of hydrogen penetration in ferric metal materials
Yudai Yamamoto; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa; Koji Fushimi
EUROCORR 2017 - The Annual Congress of the European Federation of Corrosion, 20th International Corrosion Congress and Process Safety Congress 2017, Asociace koroznich inzenyru z.s.- AKI - Czech Association of Corrosion Engineers, 2017
English, International conference proceedings

Non-uniform distribution of passive film formed on carbon steel
Koji Fushimi; Ryogo Nakagawa; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa
EUROCORR 2017 - The Annual Congress of the European Federation of Corrosion, 20th International Corrosion Congress and Process Safety Congress 2017, Asociace koroznich inzenyru z.s.- AKI - Czech Association of Corrosion Engineers, 2017
English, International conference proceedings

Effect of Cylinder Height on Directional Photoluminescence from Highly Luminous Thin Films on Periodic Plasmonic Arrays
Motoharu Saito; Shunsuke Murai; Hiroyuki Sakamoto; Masanori Yamamoto; Ryosuke Kamakura; Takayuki Nakanishi; Koji Fujita; Yasuchika Hasegawa; Katsuhisa Tanaka
MRS Advances, 2, 3, 173, 178, Materials Research Society, 2017, [Peer-reviewed]
English, International conference proceedings

Grain Dependency of a Passive Film Formed on Polycrystalline Iron in pH 8.4 Borate Solution
Y. Takabatake; Y. Kitagawa; T. Nakanishi; Y. Hasegawa; K. Fushimi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 164, 7, C349, C355, 2017, [Peer-reviewed]
English, Scientific journal

Amorphous porphyrin glasses exhibit near-infrared excimer luminescence
Mitsuhiko Morisue; Ikuya Ueno; Takayuki Nakanishi; Takafumi Matsui; Sono Sasaki; Masaki Shimizu; Jun Matsui; Yasuchika Hasegawa
RSC ADVANCES, 7, 37, 22679, 22683, 2017, [Peer-reviewed]
English, Scientific journal

Directional outcoupling of photoluminescence from Eu(III)-complex thin films by plasmonic array
S. Murai; M. Saito; H. Sakamoto; M. Yamamoto; R. Kamakura; T. Nakanishi; K. Fujita; M. A. Verschuuren; Y. Hasegawa; K. Tanaka
APL Photonics, 2, 026104, 2017, [Peer-reviewed]

Initiation of Localized Corrosion of Ferritic Stainless Steels by Using the Liquid-Phase Ion Gun Technique
Jun-Seob Lee; Takashi Kawano; Tomohiro Ishii; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa; Koji Fushimi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 164, 2, C1, C7, 2017, [Peer-reviewed]
English, Scientific journal

Organic linkers control the thermosensitivity of the emission intensities from Tb(III) and Eu(III) in a chameleon polymer
Miho Hatanaka; Yuichi Hirai; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa; Keiji Morokuma
CHEMICAL SCIENCE, 8, 1, 423, 429, Jan. 2017, [Peer-reviewed]
English, Scientific journal

Passivation Behavior of Type-316L Stainless Steel in the Presence of Hydrogen Sulfide Ions Generated from a Local Anion Generating System
Jun-Seob Lee; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa; Koji Fushimi
ELECTROCHIMICA ACTA, 220, 304, 311, Dec. 2016, [Peer-reviewed]
English, Scientific journal

Critical Role of Energy Transfer Between Terbium Ions for Suppression of Back Energy Transfer in Nonanuclear Terbium Clusters
Shun Omagari; Takayuki Nakanishi; Yuichi Kitagawa; Tomohiro Seki; Koji Fushimi; Hajime Ito; Andries Meijerink; Yasuchika Hasegawa
SCIENTIFIC REPORTS, 6, 37008, Nov. 2016, [Peer-reviewed]
English, Scientific journal

Luminescent Europium(III) Coordination Zippers Linked with Thiophene-Based Bridges
Yuichi Hirai; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Tomohiro Seki; Hajime Ito; Yasuchika Hasegawa
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 55, 39, 12059, 12062, Sep. 2016, [Peer-reviewed]
English, Scientific journal

Three-photon-induced Luminescence of Europium Acetylacetonate-type Complexes
Yasutaka Suzuki; Hiroki Moritomo; Akinari Fuji; Koichiro Satomi; Jun Kawamata; Masanori Yamamoto; Yasuchika Hasegawa
CHEMISTRY LETTERS, 45, 5, 538, 540, May 2016, [Peer-reviewed]
English, Scientific journal

Synthesis of Dipyridinogermole-Copper Complex as Soluble Phosphorescent Material
Kazuya Murakami; Yousuke Ooyama; Seiji Watase; Kimihiro Matsukawa; Shun Omagari; Takayuki Nakanishi; Yasuchika Hasegawa; Kei Inumaru; Joji Ohshita
CHEMISTRY LETTERS, 45, 5, 502, 504, May 2016, [Peer-reviewed]
English, Scientific journal

Hyper-stable organo-Eu-III luminophore under high temperature for photo-industrial application
Ayako Nakajima; Takayuki Nakanishi; Yuichi Kitagawa; Tomohiro Seki; Hajime Ito; Koji Fushimi; Yasuchika Hasegawa
SCIENTIFIC REPORTS, 6, 24458, Apr. 2016, [Peer-reviewed]
English, Scientific journal

Molecular Design Guidelines for Large Magnetic Circular Dichroism Intensities in Lanthanide Complexes
Yuichi Kitagawa; Satoshi Wada; Kei Yanagisawa; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
CHEMPHYSCHEM, 17, 6, 845, 849, Mar. 2016, [Peer-reviewed]
English, Scientific journal

The relationship between magneto-optical properties and molecular chirality
Satoshi Wada; Yuichi Kitagawa; Takayuki Nakanishi; Koji Fushimi; Yasuhiro Morisaki; Koji Fujita; Katsuaki Konishi; Katsuhisa Tanaka; Yoshiki Chujo; Yasuchika Hasegawa
NPG ASIA MATERIALS, 8, e251, Mar. 2016
English, Scientific journal

Luminescent Eu(III) coordination polymer cross-linked with Zn(II) complexes
Masanori Yamamoto; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Yasuchika Hasegawa
MATERIALS LETTERS, 167, 183, 187, Mar. 2016
English, Scientific journal

Organo-lanthanide luminophores bridged by phosphine oxide ligands
Yuichi Hirai; Takayuki Nakanishi; Yasuchika Hasegawa
JOURNAL OF LUMINESCENCE, 170, 801, 807, Feb. 2016
English, Scientific journal

Luminescent Thin Films Composed of Nanosized Europium Coordination Polymers on Glass Electrodes
Yasuchika Hasegawa; Takeshi Sugawara; Takayuki Nakanishi; Yuichi Kitagawa; Makoto Takada; Akitsugu Niwa; Hiroyoshi Naito; Koji Fushimi
CHEMPLUSCHEM, 81, 2, 187, 193, Feb. 2016
English, Scientific journal

Ellipso-Microscopic Observation of Titanium Surface under UV-Light Irradiation
Fushimi, K.; Kurauchi, K.; Nakanishi, T.; Hasegawa, Y.; Ueda, M.; Ohtsuka, T.
2016, [Peer-reviewed]
Scientific journal

Heterogeneity of a Thermal Oxide Film Formed on Polycrystalline Iron Observed by Two-Dimensional Ellipsometry
Y. Takabatake; Y. Kitagawa; T. Nakanishi; Y. Hasegawa; K. Fushimi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 163, 14, C815, C822, 2016, [Peer-reviewed]
English, Scientific journal

Visible luminescent lanthanide ions and a large pi-conjugated ligand system shake hands
Y. Kitagawa; R. Ohno; T. Nakanishi; K. Fushimia; Y. Hasegawa
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 18, 45, 31012, 31016, 2016, [Peer-reviewed]
English, Scientific journal

Thermosensitive Luminescent Lanthanide Complex with Two Photosensitized Ligands
Ayako Nakajima; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Yasuchika Hasegawa
SENSORS AND MATERIALS, 28, 8, 845, 850, 2016, [Peer-reviewed]
English, Scientific journal

Photophysical properties of luminescent silicon nanoparticles surface-modified with organic molecules via hydrosilylation
Mari Miyano; Yuichi Kitagawa; Satoshi Wada; Akira Kawashima; Ayako Nakajima; Takayuki Nakanishi; Junya Ishioka; Tamaki Shibayama; Seiichi Watanabe; Yasuchika Hasegawa
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 15, 1, 99, 104, 2016
English, Scientific journal

Acid-protected Eu(III) coordination nanoparticles covered with polystyrene
Hiromitsu Onodera; Yuichi Kitagawa; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
JOURNAL OF MATERIALS CHEMISTRY C, 4, 1, 75, 81, 2016
English, Scientific journal

Drastically Improved Durability and Efficiency of Silicon Solar Cells Using Hyper-Stable Lanthanide Coordination Polymer Beads
Hisataka Kataoka; Takayuki Nakanishi; Shun Omagari; Yu Takabatake; Yuichi Kitagawa; Yasuchika Hasegawa
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 89, 1, 103, 109, Jan. 2016
English, Scientific journal

Photoswitchable Faraday effect in EuS-Au nanosystems
Akira Kawashima; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Yasuchika Hasegawa
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 213, 1, 178, 182, Jan. 2016
English, Scientific journal

FEM Analysis for Sinusoidal Perturbation of Hydrogen Permeation into a Steel Sheet
Yudai Yamamoto; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa; Koji Fushimi
ISIJ INTERNATIONAL, 56, 3, 472, 477, 2016
English, Scientific journal

Hydrogen Permeation into a Carbon Steel Sheet Observed by a Micro-capillary Combined with a Devanathan-Stachurski Cell
Koji Fushimi; Misako Jin; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa
ISIJ INTERNATIONAL, 56, 3, 431, 435, 2016
English, Scientific journal

Titanium surface anodized under UV light irradiation observed by ellipso-microscopy
K. Fushimi; K. Kurauchi; H. Ikeyama; Y. Kitagawa; T. Nakanishi; Y. Hasegawa; M. Ueda; T. Ohtsuka
JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 19, 12, 3579, 3587, Dec. 2015
English, Scientific journal

Thermostable Eu(III)-nanorod luminophores with effective photosensitized energy transfer
Hiromitsu Onodera; Ayako Nakajima; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
JOURNAL OF ALLOYS AND COMPOUNDS, 648, 651, 657, Nov. 2015
English, Scientific journal

Emission modulation of poly(Vinyl acetate)–Tetrabutylphosphonium tetrafluoroborate hybrid film doped with 4-[Bis(4-methylphenyl)amino]-benzaldehyde
Kosuke Ogura; Zenzo Hoshi; Eisuke Nagata; Ryoji Ichikawa; Takayuki Nakanishi; Yasuchika Hasegawa; Hideyuki Nakano
Journal of Photopolymer Science and Technology, 28, 4, 601, 604, Tokai University, 05 Oct. 2015, [Peer-reviewed]
English, Scientific journal

Mechanofluorochromism of 1-Alkanoylaminopyrenes
Eisuke Nagata; Shugo Takeuchi; Takayuki Nakanishi; Yasuchika Hasegawa; Yasuteru Mawatari; Hideyuki Nakano
CHEMPHYSCHEM, 16, 14, 3038, 3043, Oct. 2015
English, Scientific journal

Seven-Coordinate Luminophores: Brilliant Luminescence of Lanthanide Complexes with C-3v Geometrical Structures
Kei Yanagisawa; Takayuki Nakanishi; Yuichi Kitagawa; Tomohiro Seki; Tomoko Akama; Masato Kobayashi; Tetsuya Taketsugu; Hajime Ito; Koji Fushimi; Yasuchika Hasegawa
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 162, 28, 4769, 4774, Oct. 2015
English, Scientific journal

Terbium Oxide, Fluoride, and Oxyfluoride Nanoparticles with Magneto-optical Properties
Akira Kawashima; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fujita; Katsuhisa Tanaka; Koji Fushimi; Mohammad A. Malik; Paul O'Brien; Yasuchika Hasegawa
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 88, 10, 1453, 1458, Oct. 2015
English, Scientific journal

Enhanced Electric Dipole Transition in Lanthanide Complex with Organometallic Ruthenocene Units
Yasuchika Hasegawa; Nao Sato; Yuichi Hirai; Takayuki Nakanishi; Yuichi Kitagawa; Atsushi Kobayashi; Masako Kato; Tomohiro Seki; Hajime Ito; Koji Fushimi
JOURNAL OF PHYSICAL CHEMISTRY A, 119, 20, 4825, 4833, May 2015, [Peer-reviewed]
English, Scientific journal

Luminescent Coordination Glass: Remarkable Morphological Strategy for Assembled Eu(III) Complexes
Yuichi Hirai; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Tomohiro Seki; Hajime Ito; Hiroyuki Fueno; Kazuyoshi Tanaka; Toshifumi Satoh; Yasuchika Hasegawa
INORGANIC CHEMISTRY, 54, 9, 4364, 4370, May 2015
English, Scientific journal

Magneto-optical property of lantanide cluster with Ln-O lattice structure
Takayuki Nakanishi; Yasuchika Hasegawa
Kobunshi, 64, 4, 203, 204, Society of Polymer Science, 01 Apr. 2015
Japanese, Scientific journal

EVA thin film with thermo- and moisture-stable luminescent copolymer beads composed of Eu(III) complexes for improvement of energy conversion efficiency on silicon solar cell
Hisataka Kataoka; Shun Omagari; Takayuki Nakanishi; Yasuchika Hasegawa
OPTICAL MATERIALS, 42, 411, 416, Apr. 2015
English, Scientific journal

Effective Photosensitized Energy Transfer of Nonanuclear Terbium Clusters Using Methyl Salicylate Derivatives
Shun Omagari; Takayuki Nakanishi; Tomohiro Seki; Yuichi Kitagawa; Yumie Takahata; Koji Fushimi; Hajime Ito; Yasuchika Hasegawa
JOURNAL OF PHYSICAL CHEMISTRY A, 119, 10, 1943, 1947, Mar. 2015
English, Scientific journal

Chiroptical properties of nonanuclear Tb(III) clusters with chiral champhor derivative ligands
Satoshi Wada; Yuichi Kitagawa; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
e-Journal of Surface Science and Nanotechnology, 13, 31, 34, Surface Science Society of Japan, 14 Feb. 2015
English, International conference proceedings

Synthesis and photoluminescence properties of nonanuclear Tb(III) clusters with long alkyl chain group
Shun Omagari; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Yasuchika Hasegawa
e-Journal of Surface Science and Nanotechnology, 13, 27, 30, Surface Science Society of Japan, 14 Feb. 2015
English, International conference proceedings

Synthesis of TbOx nanoparticles from the thermal decomposition of TB(III) complexes
Akira Kawashima; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Yasuchika Hasegawa
e-Journal of Surface Science and Nanotechnology, 13, 23, 26, Surface Science Society of Japan, 07 Feb. 2015
English, International conference proceedings

Luminescent silicon nanoparticles covered with ionic liquid
Mani Miyano; Satoshi Wada; Takayuki Nakanishi; Yasuchika Hasegawa
MATERIALS LETTERS, 141, 359, 361, Feb. 2015
English, Scientific journal

Hydrodynamic effect of entry side cell on hydrogen permeation into steel sheet
K. Fushimi; M. Jin; Y. Yamamoto; Y. Kitagawa; T. Nakanishi; Y. Hasegawa
European Corrosion Congress, EUROCORR 2015, 1, 548, 551, Austrian Society for Metallurgy and Materials (ASMET), 2015
English, International conference proceedings

Europium Chalcogenide Nanoparticles
Yasuchika Hasegawa; Takayuki Nakanishi
Handbook on the Physics and Chemistry of Rare Earths, 47, 101, 146, Elsevier, 2015, [Peer-reviewed]
English, In book

Cluster-pi electronic interaction in a superatomic Au-13 cluster bearing sigma-bonded acetylide ligands
Mizuho Sugiuchi; Yukatsu Shichibu; Takayuki Nakanishi; Yasuchika Hasegawa; Katsuaki Konishi
CHEMICAL COMMUNICATIONS, 51, 70, 13519, 13522, 2015, [Peer-reviewed]
English, Scientific journal

Passivity of Dual-Phase Carbon Steel with Ferrite and Martensite Phases in pH 8.4 Boric Acid-Borate Buffer Solution
Kei Yanagisawa; Takayuki Nakanishi; Yasuchika Hasegawa; Koji Fushimi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 162, 7, C322, C326, 2015, [Peer-reviewed]
English, Scientific journal

Luminescent Silicon Nanoparticles Surface-Modified with Chiral Molecules
Mari Miyano; Takayuki Nakanishi; Satoshi Wada; Yuichi Kitagawa; Akira Kawashima; Koji Fushimi; Yasuhiro Morisaki; Yoshiki Chujo; Yasuchika Hasegawa
JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY, 28, 2, 255, 260, 2015, [Peer-reviewed]
English, Scientific journal

Effect Of Hydrogen Sulfide Ions on the Passive Behavior of Type 316L Stainless Steel
Jun-Seob Lee; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa; Koji Fushimi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 162, 14, C685, C692, 2015
English, Scientific journal

Photo-degradation Analysis of Luminescent Polymers with Lanthanide Complexes
Hisataka Kataoka; Shun Omagari; Takayuki Nakanishi; Yasuchika Hasegawa
JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY, 28, 2, 247, 254, 2015
English, Scientific journal

Thermostable nano luminophores composed of europium ions and organic ligands
Hiromitsu Onodera; Ayako Nakajima; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
e-Journal of Surface Science and Nanotechnology, 13, 219, 222, Surface Science Society of Japan, 2015
English, International conference proceedings

Synthesis of binary solid solution Cu-Pd nanoparticles by DMF reduction for enhanced photoluminescence properties
Masashi Chiba; Mai Nguyen Thanh; Yasuchika Hasegawa; Yasushi Obora; Hideya Kawasaki; Tetsu Yonezawa
JOURNAL OF MATERIALS CHEMISTRY C, 3, 3, 514, 520, 2015
English, Scientific journal

Development of a Liquid-Phase Ion Gun and Its Application for Sulfidation of Silver Surface
Jun-Seob Lee; Koji Fushimi; Yuichi Kitagawa; Takayuki Nakanishi; Yasuchika Hasegawa
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 162, 4, C115, C120, 2015
English, Scientific journal

Luminescent lanthanide coordination polymers for photonic applications
Y. Hasegawa; T. Nakanishi
RSC ADVANCES, 5, 1, 338, 353, 2015
English

Enhanced light storage of SrAl2O4 glass-ceramics controlled by selective europium reduction
Takayuki Nakanishi; Kazune Watanabe; Jumpei Ueda; Koji Fushimi; Setsuhisa Tanabe; Yasuchika Hasegawa
Journal of the American Ceramic Society, 98, 2, 423, 429, 03 Dec. 2014
Scientific journal

Corrosion behaviour of ferrite and austenite phases on super duplex stainless steel in a modified green-death solution
Jun-Seob Lee; Koji Fushimi; Takayuki Nakanishi; Yasuchika Hasegawa; Yong-Soo Park
CORROSION SCIENCE, 89, 111, 117, Dec. 2014
English, Scientific journal

Thermo-stable Lanthanoid Coordination Nanoparticles Composed of Luminescent Eu(III) Complexes and Organic Joint Ligands Using Micelle Techniques in Water
Onodera Hiromitsu; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 87, 12, 1386, 1390, Dec. 2014
English, Scientific journal

Distibylation of Acetylenes with Ph2Sb-SbPh2: Synthesis, Crystal Structures and Phosphorescence Properties of Bis(diphenylstibyl)ethenes
Joji Ohshita; Toshiyuki Tsuchida; Kazuya Murakami; Yousuke Ooyama; Takayuki Nakanishi; Yasuchika Hasegawa; Norifumi Kobayashi; Hideyuki Higashimura
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 69, 11-12, 1181, 1187, Nov. 2014
English, Scientific journal

Growth and Degradation of an Anodic Oxide Film on Titanium in Sulphuric Acid Observed by Ellipso-microscopy
K. Fushimi; K. Kurauchi; Y. Yamamoto; T. Nakanishi; Y. Hasegawa; T. Ohtsuka
ELECTROCHIMICA ACTA, 144, 56, 63, Oct. 2014
English, Scientific journal

Photofunctional Lanthanoid Complexes, Coordination Polymers, and Nanocrystals for Future Photonic Applications
Yasuchika Hasegawa
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 87, 10, 1029, 1057, Oct. 2014
English

Thermo-sensitive luminescent materials composed of Tb(III) and Eu(III) complexes
Yuichi Hirai; Takayuki Nakanishi; Kohei Miyata; Koji Fushimi; Yasuchika Hasegawa
MATERIALS LETTERS, 130, 91, 93, Sep. 2014
English, Scientific journal

Novel Synthesis and Effective Surface Protection of Air-Stable Luminescent Silicon Nanoparticles
Mari Miyano; Shinobu Endo; Hideaki Takenouchi; Satoshi Nakamura; Yoshinori Iwabuti; Osamu Shiino; Takayuki Nakanishi; Yasuchika Hasegawa
JOURNAL OF PHYSICAL CHEMISTRY C, 118, 34, 19778, 19784, Aug. 2014
English, Scientific journal

Enhancement of Optical Faraday Effect of Nonanuclear Tb(III) Complexes
Takayuki Nakanishi; Yuki Suzuki; Yoshihiro Doi; Tomohiro Seki; Hitoshi Koizumi; Koji Fushimi; Koji Fujita; Yukio Hinatsu; Hajime Ito; Katsuhisa Tanaka; Yasuchika Hasegawa
INORGANIC CHEMISTRY, 53, 14, 7635, 7641, Jul. 2014
English, Scientific journal

Photo- and thermo-stable luminescent beads composed of Eu(III) complexes and PMMA for enhancement of silicon solar cell efficiency
Hisataka Kataoka; Tetsuo Kitano; Toshiki Takizawa; Yuichi Hirai; Takayuki Nakanishi; Yasuchika Hasegawa
JOURNAL OF ALLOYS AND COMPOUNDS, 601, 293, 297, Jul. 2014
English, Scientific journal

Ratiometric luminescence thermometry based on crystal-field alternation at the extremely narrow D-5(0) -> F-7(2) transition band of europium(III)
Junpei Yuasa; Ryusuke Mukai; Yasuchika Hasegawa; Tsuyoshi Kawai
CHEMICAL COMMUNICATIONS, 50, 59, 7937, 7940, 2014
English, Scientific journal

Synthesis of Group 14 Dipyridinometalloles with Enhanced Electron-Deficient Properties and Solid-State Phosphorescence
Joji Ohshita; Kazuya Murakami; Daiki Tanaka; Yousuke Ooyama; Tomonobu Mizumo; Norifumi Kobayashi; Hideyuki Higashimura; Takayuki Nakanish; Yasuchika Hasegawa
ORGANOMETALLICS, 33, 2, 517, 521, Jan. 2014
English, Scientific journal

Grain-Dependent Passivation of Iron in Sulfuric Acid Solution
Y. Takabatake; K. Fushimi; T. Nakanishi; Y. Hasegawa
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 161, 14, C594, C600, 2014
English, Scientific journal

Convection-Dependent Hydrogen Permeation into a Carbon Steel Sheet
K. Fushimi; M. Jin; T. Nakanishi; Y. Hasegawa; T. Kawano; M. Kimura
ECS ELECTROCHEMISTRY LETTERS, 3, 6, C21, C23, 2014
English, Scientific journal

Microelectrochemistry of dual-phase steel corroding in 0.1 M sulfuric acid
K. Fushimi; K. Yanagisawa; T. Nakanishi; Y. Hasegawa; T. Kawano; M. Kimura
ELECTROCHIMICA ACTA, 114, 83, 87, Dec. 2013
English, Scientific journal

Effect of Ligand Polarization on Asymmetric Structural Formation for Strongly Luminescent Lanthanide Complexes
Yasuchika Hasegawa; Tomoki Ohkubo; Takayuki Nakanishi; Atsushi Kobayashi; Masako Kato; Tomohiro Seki; Hajime Ito; Koji Fushimi
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2013, 34, 5911, 5918, Dec. 2013
English, Scientific journal

Microelectrode techniques for corrosion research of iron
K. Fushimi; Y. Takabatake; T. Nakanishi; Y. Hasegawa
ELECTROCHIMICA ACTA, 113, 741, 747, Dec. 2013
English, Scientific journal

trans-Bisglycoconjugation is an Efficient and Robust Architecture for PDT Photosensitizers Based on 5,10,15,20-Tetrakis(pentafluorophenyl)porphyrin Derivatives
Shiho Hirohara; Kohei Sharyo; Yuji Kawasaki; Masayasu Totani; Ayumi Tomotsuka; Ryota Funasako; Nobutaka Yasui; Yasuchika Hasegawa; Junpei Yuasa; Takuya Nakashima; Tsuyoshi Kawai; Chio Oka; Masashi Kawaichi; Makoto Obata; Masao Tanihara
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 86, 11, 1295, 1308, Nov. 2013
English, Scientific journal

Enhanced Magneto-optical Properties of Semiconductor EuS Nanocrystals Assisted by Surface Plasmon Resonance of Gold Nanoparticles
Akira Kawashima; Takayuki Nakanishi; Tamaki Shibayama; Seiichi Watanabe; Koji Fujita; Katsuhisa Tanaka; Hitoshi Koizumi; Koji Fushimi; Yasuchika Hasegawa
CHEMISTRY-A EUROPEAN JOURNAL, 19, 43, 14438, 14445, Oct. 2013
English, Scientific journal

EuS Nano-assembles Linked with Photo-functional Naphthalenedithiols
Akira Kawashima; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 579, 1, 69, 76, Sep. 2013
English, Scientific journal

Synthesis, Optical Properties, and Crystal Structures of Dithienostannoles
Daiki Tanaka; Joji Ohshita; Yousuke Ooyama; Norifumi Kobayashi; Hideyuki Higashimura; Takayuki Nakanishi; Yasuchika Hasegawa
ORGANOMETALLICS, 32, 15, 4136, 4141, Aug. 2013
English, Scientific journal

Novel opto-magnetic silicate glass with semiconductor EuS nanocrystals
Takayuki Nakanishi; Masashi Maeda; Akira Kawashima; Shogo Kamiya; Koji Fushimi; Koji Fujita; Katsuhisa Tanaka; Yasuchika Hasegawa
Journal of Alloys and Compounds, 562, 123, 127, 15 Jun. 2013
English, Scientific journal

A luminescent single-molecule magnet: Observation of magnetic anisotropy using emission as a probe
Kei Yamashita; Rie Miyazaki; Yumiko Kataoka; Takayuki Nakanishi; Yasuchika Hasegawa; Motohiro Nakano; Tomoo Yamamura; Takashi Kajiwara
Dalton Transactions, 42, 6, 1987, 1990, Royal Society of Chemistry, 14 Feb. 2013
English, Scientific journal

Effective Optical Faraday Rotations of Semiconductor EuS Nanocrystals with Paramagnetic Transition-Metal Ions
Yasuchika Hasegawa; Masashi Maeda; Takayuki Nakanishi; Yoshihiro Doi; Yukio Hinatsu; Koji Fujita; Katsuhisa Tanaka; Hitoshi Koizumi; Koji Fushimi
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 135, 7, 2659, 2666, Feb. 2013
English, Scientific journal

Fingerprint signatures of lanthanide circularly polarized luminescence from proteins covalently labeled with a beta-diketonate europium(III) chelate
Junpei Yuasa; Tomoko Ohno; Hiroyuki Tsumatori; Rumi Shiba; Hironari Kamikubo; Mikio Kataoka; Yasuchika Hasegawa; Tsuyoshi Kawai
CHEMICAL COMMUNICATIONS, 49, 41, 4604, 4606, 2013
English, Scientific journal

Chameleon Luminophore for Sensing Temperatures: Control of Metal-to-Metal and Energy Back Transfer in Lanthanide Coordination Polymers
Kohei Miyata; Yuji Konno; Takayuki Nakanishi; Atsushi Kobayashi; Masako Kato; Koji Fushimi; Yasuchika Hasegawa
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 52, 25, 6413, 6416, 2013
English, Scientific journal

Magnetic Semiconductor EuO, EuS, and EuSe Nanocrystals for Future Optical Devices
Yasuchika Hasegawa
CHEMISTRY LETTERS, 42, 1, 2, 7, Jan. 2013
English

First Synthesis of EuS Nanoparticle Thin Film with a Wide Energy Gap and Giant Magneto-Optical Efficiency on a Glass Electrode
Yasuchika Hasegawa; Mina Kumagai; Akira Kawashima; Takayuki Nakanishi; Koji Fujita; Katsuhisa Tanaka; Koji Fushimi
JOURNAL OF PHYSICAL CHEMISTRY C, 116, 36, 19590, 19596, Sep. 2012
English, Scientific journal

Nona-Coordinated Chiral Eu(III) Complexes with Stereoselective Ligand-Ligand Noncovalent Interactions for Enhanced Circularly Polarized Luminescence
Takashi Harada; Hiroyuki Tsumatori; Katsura Nishiyama; Junpei Yuasa; Yasuchika Hasegawa; Tsuyoshi Kawai
INORGANIC CHEMISTRY, 51, 12, 6476, 6485, Jun. 2012
English, Scientific journal

Solvent-dependent luminescence of eight-coordinated Eu(III) complexes with bidentate phosphine oxide
Kohei Miyata; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 235, 35, 39, May 2012
English, Scientific journal

Synthesis of PbS/EuS Core/Shell Nanocrystals
Takuya Nakashima; Hiroki Nakao; Atsushi Tanaka; Yasuchika Hasegawa; Tsuyoshi Kawai
CHEMISTRY LETTERS, 41, 4, 412, 414, Apr. 2012
English, Scientific journal

Thermostable Organo-phosphor: Low-Vibrational Coordination Polymers That Exhibit Different Intermolecular Interactions
Kohei Miyata; Tadashi Ohba; Atsushi Kobayashi; Masako Kato; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
CHEMPLUSCHEM, 77, 4, 277, 280, Apr. 2012
English, Scientific journal

フロー型微小液滴セルを用いたチタン表面の微細加工
伏見公志; 渡邊治憲; 中西貴之; 長谷川靖哉
表面技術, 63, 6, 375, 380, The Surface Finishing Society of Japan, 2012
Japanese, Flowing-type micro-droplet cells (f-MDC) were applied to the anodic polarization of titanium surface in sodium-chloride-containing ethylene glycol solution. Anodic current attributable to removal of the surface oxide and the dissolving substrate flowed locally at the area limited with f-MDC, forming a hole on the surface. The hole shape and morphology were dependent on the applied voltage, polarization time, flowing volume rate, and the capillary employed for the f-MDC. Suitable conditions for polarization to obtain an ordered hole with f-MDC were discussed.

Eu(III) emission band changes caused by peripheral C-H/O hydrogen bonding
Yusuke Kuramochi; Tetsuya Nakagawa; Toshiaki Yokoo; Junpei Yuasa; Tsuyoshi Kawai; Yasuchika Hasegawa
DALTON TRANSACTIONS, 41, 22, 6634, 6640, 2012
English, Scientific journal

Brilliant Triboluminescence of a Lanthanide Coordination Polymer with Low-Vibrational-Frequency and Non-Centrosymmetric Structural Networks
Yasuchika Hasegawa; Ryo Hieda; Kohei Miyata; Tetsuya Nakagawa; Tsuyoshi Kawai
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 32, 4978, 4984, Nov. 2011
English, Scientific journal

Shielding effect of double microelectrode tips in a scanning electrochemical microscope
Koji Fushimi; Ken-ichiro Matsushita; Yasuchika Hasegawa
ELECTROCHIMICA ACTA, 56, 26, 9602, 9608, Nov. 2011
English, Scientific journal

Noncovalent Ligand-to-Ligand Interactions Alter Sense of Optical Chirality in Luminescent Tris(beta-diketonate) Lanthanide(III) Complexes Containing a Chiral Bis(oxazolinyl) Pyridine Ligand
Junpei Yuasa; Tomoko Ohno; Kohei Miyata; Hiroyuki Tsumatori; Yasuchika Hasegawa; Tsuyoshi Kawai
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 133, 25, 9892, 9902, Jun. 2011
English, Scientific journal

Enhanced Near-Infrared Luminescence of Yb(III) Complexes with Phosphine Oxide and Hexafluoroacetylacetonate Ligands
Shin-ichiro Kishimoto; Tetsuya Nakagawa; Tsuyoshi Kawai; Yasuchika Hasegawa
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 84, 2, 148, 154, Feb. 2011
English, Scientific journal

Heterogeneous dissolution of polycrystalline pure iron in sulphuric acid solution
K. Fushimi; K. Matsushita; K. Miyamoto; Y. Hasegawa
Proceedings of EUROCORR 2011 (CD-ROM), 4747, 2011, [Peer-reviewed]
English, International conference proceedings

Circularly Polarized Light from Chiral Lanthanide(III) Complexes in Single Crystals
Hiroyuki Tsumatori; Takashi Harada; Junpei Yuasa; Yasuchika Hasegawa; Tsuyoshi Kawai
APPLIED PHYSICS EXPRESS, 4, 1, 11601, Jan. 2011
English, Scientific journal

Size-Controlled Aggregation of Cube-Shaped EuS Nanocrystals with Magneto-Optic Properties in Solution Phase
Atsushi Tanaka; Hironari Kamikubo; Mikio Kataoka; Yasuchika Hasegawa; Tsuyoshi Kawai
LANGMUIR, 27, 1, 104, 108, Jan. 2011
English, Scientific journal

Remarkable Luminescence Properties of Lanthanide Complexes with Asymmetric Dodecahedron Structures
Kohei Miyata; Tetsuya Nakagawa; Ryuhei Kawakami; Yuki Kita; Katsufumi Sugimoto; Takuya Nakashima; Takashi Harada; Tsuyoshi Kawai; Yasuchika Hasegawa
CHEMISTRY-A EUROPEAN JOURNAL, 17, 2, 521, 528, 2011
English, Scientific journal

Recent advances in instrumentation for absolute emission quantum yield measurements
Hitoshi Ishida; Seiji Tobita; Yasuchika Hasegawa; Ryuzi Katoh; Koichi Nozaki
COORDINATION CHEMISTRY REVIEWS, 254, 21-22, 2449, 2458, Nov. 2010
English, Scientific journal

Recent progress of luminescent metal complexes with photochromic units
Yasuchika Hasegawa; Tetsuya Nakagawa; Tsuyoshi Kawai
COORDINATION CHEMISTRY REVIEWS, 254, 21-22, 2643, 2651, Nov. 2010
English, Scientific journal

Self-Assembly and Enhanced Magnetic Properties of Three-Dimensional Superlattice Structures Composed of Cube-Shaped EuS Nanocrystals
Atsushi Tanaka; Hironari Kamikubo; Yoshihiro Doi; Yukio Hinatsu; Mikio Kataoka; Tsuyoshi Kawai; Yasuchika Hasegawa
CHEMISTRY OF MATERIALS, 22, 5, 1776, 1781, Mar. 2010
English, Scientific journal

Absorption cross-section control of Eu(III) complexes for increase of amplified spontaneous emission excited by third harmonic of nanosecond Nd:YAG laser
Yasuchika Hasegawa; Kazuki Nakamura; Hideki Kawai; Naoki Yasuda; Yasunori Tsukahara; Yuji Wada
Journal of Alloys and Compounds, 488, 2, 578, 581, 04 Dec. 2009
Scientific journal

Circularly Polarized Luminescence of Eu(III) Complexes with Point- and Axis-Chiral Ligands Dependent on Coordination Structures
Takashi Harada; Yoko Nakano; Michiya Fujiki; Masanobu Naito; Tsuyoshi Kawai; Yasuchika Hasegawa
INORGANIC CHEMISTRY, 48, 23, 11242, 11250, Dec. 2009, [Peer-reviewed]
English, Scientific journal

Emission properties of Sm(III) complexes having remarkably deep-red emission band
Hideki Kawai; Chen Zhao; Shin-ichi Tsuruoka; Takahiko Yoshida; Yasuchika Hasegawa; Tsuyoshi Kawai
JOURNAL OF ALLOYS AND COMPOUNDS, 488, 2, 612, 614, Dec. 2009
English, Scientific journal

Crystal growth of nanoscaled europium selenide having characteristic crystal shapes
Atsushi Tanaka; Taka-aki Adachi; Yasuchika Hasegawa; Tsuyoshi Kawai
JOURNAL OF ALLOYS AND COMPOUNDS, 488, 2, 538, 540, Dec. 2009
English, Scientific journal

Circularly polarized luminescence from chiral Eu(III) Complex with high emission quantum yield
Takashi Harada; Yasuchika Hasegawa; Yoko Nakano; Michiya Fujiki; Masanobu Naito; Takehiko Wada; Yoshihisa Inoue; Tsuyoshi Kawai
JOURNAL OF ALLOYS AND COMPOUNDS, 488, 2, 599, 602, Dec. 2009
English, Scientific journal

Characteristic Structures and Photophysical Properties of Nine-Coordinate Europium(III) Complexes with Tandem-Connected Tridentate Phosphane Oxide Ligands
Kohei Miyata; Yasuchika Hasegawa; Yusuke Kuramochi; Tetsuya Nakagawa; Toshiaki Yokoo; Tsuyoshi Kawai
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 32, 4777, 4785, Nov. 2009
English, Scientific journal

Self-aggregation of magnetic semiconductor EuS nanocrystals
Atsushi Tanaka; Yasuchika Hasegawa; Hironari Kamikubo; Mikio Kataoka; Tsuyoshi Kawai
THIN SOLID FILMS, 518, 2, 870, 872, Nov. 2009
English, Scientific journal

Circularly Polarized Luminescence of Eu(III) Complex Depended on the Electric-dipole Transition Probability
T. Harada; Y. Hasegawa; Y. Nakano; M. Fujiki; M. Naito; T. Kawai
Inorg. Chem., 48, 11242, 11250, 2009

Systematic Investigation of Molecular Arrangements and Solid-State Fluorescence Properties on Salts of Anthracene-2,6-disulfonic Acid with Aliphatic Primary Amines
Yuji Mizobe; Tomoaki Hinoue; Atsushi Yamamoto; Ichiro Hisaki; Mikiji Miyata; Yasuchika Hasegawa; Norimitsu Tohnai
CHEMISTRY-A EUROPEAN JOURNAL, 15, 33, 8175, 8184, 2009
English

Nondestructive luminescence intensity readout of a photochromic lanthanide(III) complex
Tetsuya Nakagawa; Yasuchika Hasegawa; Tsuyoshi Kawai
CHEMICAL COMMUNICATIONS, 37, 37, 5630, 5632, 2009
English, Scientific journal

Metal-Ion Sensing Europium(III) Complexes with Bidentate Phosphine Oxide Ligands Containing a 2,2 '-Bipyridine Framework
Yasuchika Hasegawa; Ryo Hieda; Tetsuya Nakagawa; Tsuyoshi Kawai
HELVETICA CHIMICA ACTA, 92, 11, 2238, 2248, 2009
English, Scientific journal

Enhancement of Amplified Spontaneous Emission of Eu(III) Complexes by Increase of Absorption Cross Section
Y. Hasegawa; K. Nakamura; H. Kawai; N. Yasuda; Y. Tsukahara; Y. Wada
J. Alloy. Compd., 488, 578, 581, 2009

Octadehydrodibenzo[12]annulene-Based Organogels: Two Methyl Ester Groups Prevent Crystallization and Promote Gelation
Ichiro Hisaki; Hajime Shigemitsu; Yuu Sakamoto; Yasuchika Hasegawa; Yasuo Okajima; Kazunori Nakano; Norimitsu Tohnai; Mikiji Miyata
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 48, 30, 5465, 5469, 2009
English, Scientific journal

Remarkable chiral and luminescent properties of novel Yb(III) and Eu(III) complexes containing BINAPO ligand
Md. Abdus Subhan; Yasuchika Hasegawa; Takayoshi Suzuki; Sumio Kaizaki; Yanagida Shozo
INORGANICA CHIMICA ACTA, 362, 1, 136, 142, Jan. 2009
English, Scientific journal

Near-infrared luminescent polymer thin films containing Yb(III) complex and photosensitized dye
Shin-ichiro Kishimoto; Atsushi Tanaka; Yasuchika Hasegawa; Tsuyoshi Kawai
THIN SOLID FILMS, 517, 4, 1497, 1499, Dec. 2008
English, Scientific journal

Photoresponsive europium(III) complex based on photochromic reaction
Tetsuya Nakagawa; Yasuchika Hasegawa; Tsuyoshi Kawai
JOURNAL OF PHYSICAL CHEMISTRY A, 112, 23, 5096, 5103, Jun. 2008
English

Remarkable magneto-optical properties of europium selenide nanoparticles with wide energy gaps
Yasuchika Hasegawa; Taka-Aki Adachi; Atsushi Tanaka; Mohammad Afzaal; Paul O'Brien; Takahiro Doi; Yukio Hinatsu; Koji Fujita; Katsuhisa Tanaka; Tsuyoshi Kawai
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 130, 17, 5710, 5715, Apr. 2008
English, Scientific journal

Optical and electroluminescent properties of samarium complex-based organic light-emitting diodes
Zenken Kin; Hirotake Kajii; Yasuchika Hasegawa; Tsuyoshi Kawai; Yutaka Ohmori
THIN SOLID FILMS, 516, 9, 2735, 2738, Mar. 2008
English, Scientific journal

Preparation of EuSe nanoparticles from Eu(III) complex containing selenides
Taka-aki Adachi; Atsushi Tanaka; Yasuchika Hasegawa; Tsuyoshi Kawai
THIN SOLID FILMS, 516, 9, 2460, 2462, Mar. 2008
English, Scientific journal

Emission properties of Sm(III) complex having ten-coordination structure
Yasuchika Hasegawa; Shin-ichi Tsuruoka; Takahiko Yoshida; Hideki Kawai; Tsuyoshi Kawai
THIN SOLID FILMS, 516, 9, 2704, 2707, Mar. 2008
English, Scientific journal

Improvement of lasing properties of europium (III) complexes by increase of emission quantum yield
Kazuki Nakamura; Yasuchika Hasegawa; Hideki Kawai; Naoki Yasuda; Yasunori Tsukahara; Yuji Wada
THIN SOLID FILMS, 516, 9, 2376, 2381, Mar. 2008
English, Scientific journal

Photosensitized near-infrared luminescence of Yb(III) complexes containing phenanthroline derivatives
Yasuchika Hasegawa; Takuma Yasuda; Kazuki Nakamura; Tsuyoshi Kawai
JAPANESE JOURNAL OF APPLIED PHYSICS, 47, 2, 1192, 1195, Feb. 2008
English, Scientific journal

Enhanced deep-red luminescence of tris(hexafluoroacetylacetonato)samarium(III) complex with phenanthroline in solution by control of ligand coordination
Yasuchika Hasegwa; Shin-ichi Tsuruoka; Takahiko Yoshida; Hideki Kawai; Tsuyoshi Kawai
JOURNAL OF PHYSICAL CHEMISTRY A, 112, 5, 803, 807, Feb. 2008
English, Scientific journal

Enhanced Faraday rotation of cube-shaped EuS nanocrystals with a magnetic coercive field
Y. Hasegawa; A. Tanaka; Y. Doi; Y. Hinatsu; K. Fujita; K. Tanaka; T. Kawai
IUMRS-ICA 2008 SYMPOSIUM AA. RARE-EARTH RELATED MATERIAL PROCESSING AND FUNCTIONS, 1, 1, 7, 2008
English, International conference proceedings

Energy-transfer mechanism in photoluminescent Terbium(III) complexes causing their temperature-dependence
Shinya Katagiri; Yasunori Tsukahara; Yasuchika Hasegawa; Yuji Wada
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 80, 8, 1492, 1503, Aug. 2007
English, Scientific journal

Photochromism of thiazole-containing triangle terarylenes
Takuya Nakashima; Kazuhiko Atsumi; Shigekazu Kawai; Tetsuya Nakagawa; Yasuchika Hasegawa; Tsuyoshi Kawai
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, 19, 19, 3212, 3218, Jul. 2007
English, Scientific journal

Distinct guest-dependent changes in arrangements of a fluorophore and the corresponding emission modes in a ternary system: Transcription and translation of guest molecular information
Yuji Mizobe; Tornoaki Hinoue; Mikiji Miyata; Ichiro Hisaki; Yasuchika Hasegawa; Norimitsu Tohnai
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 80, 6, 1162, 1172, Jun. 2007
English, Scientific journal

Enhanced lasing properties of dissymmetric Eu(III) complex with bidentate phosphine ligands
Kazuki Nakamura; Yasuchika Hasegawa; Hideki Kawai; Naoki Yasuda; Nobuko Kanehisa; Yasushi Kai; Toshihiko Nagamura; Shozo Yanagida; Yuji Wada
JOURNAL OF PHYSICAL CHEMISTRY A, 111, 16, 3029, 3037, Apr. 2007
English

Reversible luminescence modulation in photochromic europium(III) complex having triangle terthiazole ligands
Tetsuya Nakagawa; Kazuhiko Atsumi; Takuya Nakashima; Yasuchika Hasegawa; Tsuyoshi Kawai
CHEMISTRY LETTERS, 36, 3, 372, 373, Mar. 2007, [Peer-reviewed]
English, Scientific journal

Three-dimensional optical trapping and arrangements of magnetic semiconductor EuS nanoaggregations
Atsushi Tanaka; Tadao Sugiura; Tsuyoshi Kawai; Yasuchika Hasegawa
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 46, 8-11, L259, L261, Mar. 2007
English, Scientific journal

Reversible luminescent control of novel Eu(III) complex having photochromic ligand
T. Nakagawa; K. Atsumi; T. Nakashima; Y. Hasegawa; T. Kawai
Chem. Lett., 36, 372, 378, 2007

Photoluminescence and electroluminescence in combination of rare-earth metal complexes and phosphorescent molecules
Z. Kin; Y. Hino; H. Kajii; Y. Hasegawa; T. Kawai; Y. Ohmori
Mater. Res. Soc. Sump. Proc., 965, S04-02, 2007

Visible and near-infrared luminescence from self-assembled lanthanide(III) clusters with organic photo sensitizers
Kazuhiro Manseki; Yasuchika Hasegawa; Yuji Wada; Hideki Ichida; Yasuo Kanematsu; Takashi Kushida
JOURNAL OF LUMINESCENCE, 122, 262, 264, Jan. 2007
English, Scientific journal

Anomalous anthracene arrangement and rare excimer emission in the solid state: Transcription and translation of molecular information
Yuji Mizobe; Mikiji Miyata; Ichiro Hisaki; Yasuchika Hasegawa; Norimitsu Tohnai
ORGANIC LETTERS, 8, 19, 4295, 4298, Sep. 2006
English, Scientific journal

Synthesis and photophysical properties of EuS nanoparticles from the thermal reduction of novel Eu(III) complex
Y Hasegawa; Y Okada; T Kataoka; T Sakata; H Mori; Y Wada
JOURNAL OF PHYSICAL CHEMISTRY B, 110, 18, 9008, 9011, May 2006
English, Scientific journal

A novel strategy for fluorescence enhancement in the solid-state: affording rigidity to fluorophores packing
Yuji Mizobe; Hiromichi Ito; Ichiro Hisaki; Mikiji Miyata; Yasuchika Hasegawa; Norimitsu Tohnai
CHEMICAL COMMUNICATIONS, 20, 2126, 2128, May 2006
English, Scientific journal

Syntheses, structures, near-infrared and visible luminescence, and magnetic properties of lanthanide-organic frameworks with an imidazole-containing flexible ligand
ZH Zhang; Y Song; T Okamura; Y Hasegawa; WY Sun; N Ueyama
INORGANIC CHEMISTRY, 45, 7, 2896, 2902, Apr. 2006
English, Scientific journal

The first observation of the magnetic circular dichroism in EuS nanocrystals
Y Tsukahara; T Kataoka; Y Hasegawa; S Kaizaki; Y Wada
JOURNAL OF ALLOYS AND COMPOUNDS, 408, 203, 206, Feb. 2006, [Peer-reviewed]
English, Scientific journal

Photophysical properties of tetranuclear Eu(III) complexes in polyphenylsilsesqioxane (PPSQ)
K Manseki; Y Hasegawa; Y Wada; S Yanagida
JOURNAL OF ALLOYS AND COMPOUNDS, 408, 805, 808, Feb. 2006
English, Scientific journal

Temperature-dependent energy transfer in photo-sensitized luminescence of rare earth complexes
S Katagiri; Y Hasegawa; Y Wada; K Mitsuo; S Yanagida
JOURNAL OF ALLOYS AND COMPOUNDS, 408, 809, 812, Feb. 2006
English, Scientific journal

High lasing oscillation efficiency of Eu(III) complexes having remarkably sharp emission band
K Nakamura; Y Hasegawa; H Kawai; N Yasuda; Y Wada; S Yanagida
JOURNAL OF ALLOYS AND COMPOUNDS, 408, 771, 775, Feb. 2006
English, Scientific journal

EPR spectra analysis of photo-magnetic properties of EuO nanocrystals
Y Hasegawa; Y Wada; S Yanagida
JOURNAL OF ALLOYS AND COMPOUNDS, 408, 207, 211, Feb. 2006
English, Scientific journal

Molecular design of luminescent Eu(III) complexes as lanthanide lasing material and their optical properties
Y Hasegawa; H Kawai; K Nakamura; N Yasuda; Y Wada; S Yanagida
JOURNAL OF ALLOYS AND COMPOUNDS, 408, 669, 674, Feb. 2006
English, Scientific journal

The first observation of the MCD analysis of EuS nanocrystals
Y. Tsukahara; T. Kataoka; Y. Hasegawa; S. Kaizaki; Y. Wada
J. Alloy Compd., 408-412, 203, 2006

Syntheses, structures, and luminescent and magnetic properties of novel three-dimensional lanthanide complexes with 1,3,5-benzenetriacetate
ZH Zhang; T Okamura; Y Hasegawa; H Kawaguchi; LY Kong; WY Sun; N Ueyama
INORGANIC CHEMISTRY, 44, 18, 6219, 6227, Sep. 2005
English, Scientific journal

Photosensitized luminescence of thermostable polynuclear Eu(III) complexes
K Manseki; Y Hasegawa; Y Wada; S Yanagida
JOURNAL OF LUMINESCENCE, 111, 3, 183, 189, Feb. 2005
English, Scientific journal

Size-controlled synthesis of quantum-sized EuS nanoparticles and tuning of their Faraday rotation peak
T Kataoka; Y Tsukahara; Y Hasegawa; Y Wada
CHEMICAL COMMUNICATIONS, 14, 48, 6038, 6040, 2005
English, Scientific journal

pH-dependent reversible transformation of TPPS4 anchored on mesoporous TiO2 film between monomers and J-aggregates
Y Fujii; Y Hasegawa; S Yanagida; Y Wada
CHEMICAL COMMUNICATIONS, 14, 24, 3065, 3067, 2005
English, Scientific journal

A tunable solid-state fluorescence system consisting of organic salts of anthracene-2,6-disulfonic acid with primary amines
Y Mizobe; N Tohnai; M Miyata; Y Hasegawa
CHEMICAL COMMUNICATIONS, 14, 14, 1839, 1841, 2005
English, Scientific journal

A novel method for synthesizing EuS nanocrystals from a single-source precursor under white LED irradiation
Y Hasegawa; M Afzaal; P O'Brien; Y Wada; S Yanagida
CHEMICAL COMMUNICATIONS, 14, 2, 242, 243, 2005
English, Scientific journal

Strategies for the design of luminescent lanthanide(III) complexes and their photonic applications
Y Hasegawa; Y Wada; S Yanagida
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 5, 3, 183, 202, Dec. 2004
English

Novel luminescent Eu(III) complex with remarkably narrow emission band
K Nakamura; Y Hasegawa; Y Wada; S Yanagida
CHEMICAL PHYSICS LETTERS, 398, 4-6, 500, 504, Nov. 2004
English, Scientific journal

Thermo-sensitive luminescence based on the back energy transfer in terbium(III) complexes
S Katagiri; Y Hasegawa; Y Wada; S Yanagida
CHEMISTRY LETTERS, 33, 11, 1438, 1439, Nov. 2004
English, Scientific journal

Lanthanide heterometallic molecular squares Ru-2-Ln(2) exhibiting sensitized near-infrared emission
D Guo; CY Duan; F Lu; Y Hasegawa; QJ Meng; S Yanagida
CHEMICAL COMMUNICATIONS, 13, 1486, 1487, Jul. 2004
English, Scientific journal

Photo-sensitizing ruthenium complexes for solid state dye solar cells in combination with conducting polymers as hole conductors
Y Saito; T Azechi; T Kitamura; Y Hasegawa; Y Wada; S Yanagida
COORDINATION CHEMISTRY REVIEWS, 248, 13-14, 1469, 1478, Jul. 2004
English

Preparation and physical properties of EuO nanocrystals using Eu(II)-exchanged zeolite X as a precursor
S Thongchant; S Katagiri; Y Hasegawa; Y Wada; S Watase; M Nakamoto; T Sakata; H Mori; S Yanagida
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 77, 4, 807, 812, Apr. 2004
English, Scientific journal

Blue phosphorescence of the novel dinuclear gold(I) complex bridged by 1,3-benzenedithiolate in solution
S Watase; T Kitamura; Y Hasegawa; N Kanehisa; M Nakamoto; Y Kai; S Yanagida
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 77, 3, 531, 536, Mar. 2004
English, Scientific journal

Intrazeolite nanostructure of Nd(III) complex giving strong near-infrared luminescence
M Ryo; Y Wada; T Okubo; Y Hasegawa; S Yanagida
JOURNAL OF PHYSICAL CHEMISTRY B, 107, 41, 11302, 11306, Oct. 2003
English, Scientific journal

Polymer thin films containing Eu(III) complex as lanthanide lasing medium
Y Hasegawa; Y Wada; S Yanagida; H Kawai; N Yasuda; T Nagamura
APPLIED PHYSICS LETTERS, 83, 17, 3599, 3601, Oct. 2003
English, Scientific journal

Size selective synthesis of surface-modified EuS nanocrystals using pyridine and their physical properties
S Thongchant; Y Hasegawa; Y Wada; S Yanagida
CHEMISTRY LETTERS, 32, 8, 706, 707, Aug. 2003
English, Scientific journal

First observation of Faraday effect of EuS nanocrystals in polymer thin films
S Thongchant; Y Hasegawa; K Tanaka; K Fujita; K Hira; Y Wada; S Yanagida
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 42, 7B, L876, L878, Jul. 2003
English, Scientific journal

Liquid-phase synthesis of EuS nanocrystals and their physical properties
Supitcha Thongchant; Yasuchika Hasegawa; Yuji Wada; Shozo Yanagida
Journal of Physical Chemistry B, 107, 10, 2193, 2196, 13 Mar. 2003, [Peer-reviewed]
English, Scientific journal

Low-vibrational luminescent polymers including tris(bis-perfluoromethane and ethanesulfonylaminate)neodymium(III) with 8 coordinated DMSO-d6
Y Hasegawa; K Sogabe; Y Wada; S Yanagida
JOURNAL OF LUMINESCENCE, 101, 3, 235, 242, Mar. 2003
English, Scientific journal

Liquid-phase synthesis of EuS nanocrystals and their physical properties
S Thongchant; Y Hasegawa; Y Wada; S Yanagida
JOURNAL OF PHYSICAL CHEMISTRY B, 107, 10, 2193, 2196, Mar. 2003
English, Scientific journal

Luminescent polymer containing the Eu(III) complex having fast radiation rate and high emission quantum efficiency
Y Hasegawa; M Yamamuro; Y Wada; N Kanehisa; Y Kai; S Yanagida
JOURNAL OF PHYSICAL CHEMISTRY A, 107, 11, 1697, 1702, Mar. 2003
English, Scientific journal

EuO Nanocrystal Formation under ArF Laser Irradiation
Hasegawa, Y.; Thongchant, S.; Kataoka, T.; Wada, Y.; Yatsuhashi, T.; Nakashima, N.; Yanagida, S.
Chemistry Letters, 32, 8, 708, 709, 2003
Scientific journal

Polyphenylsilsesquioxane partially-substituted with germanium: Refractive index controllability and thermal stability
N Yasuda; S Yamamoto; Y Hasegawa; H Nobutoki; Y Wada; S Yanagida
CHEMISTRY LETTERS, 2, 244, 245, Feb. 2002
English, Scientific journal

Enhanced luminescence and photomagnetic properties of surface-modified EuO nanocrystals
Y Hasegawa; S Thongchant; Y Wada; H Tanaka; T Kawai; T Sakata; H Mori; S Yanagida
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 41, 12, 2073, 2075, 2002
English, Scientific journal

Spectroscopic study on strongly luminescent Nd(III) exchanged zeolite: TMA(+)-containing FAU type zeolite as a suitable host for ship-in-bottle synthesis
M Ryo; Y Wada; T Okubo; T Nakazawa; Y Hasegawa; S Yanagida
JOURNAL OF MATERIALS CHEMISTRY, 12, 6, 1748, 1753, 2002
English, Scientific journal

Novel synthesis of phase-pure nano-particulate anatase and rutile TiO2 using TiCl4 aqueous solutions
HB Yin; Y Wada; T Kitamura; T Sumida; Y Hasegawa; S Yanagida
JOURNAL OF MATERIALS CHEMISTRY, 12, 2, 378, 383, 2002
English, Scientific journal

Spindle-type EuO nanocrystals and their magnetic properties
S Thongchant; Y Hasegawa; Y Wada; S Yanagida
CHEMISTRY LETTERS, 12, 1274, 1275, Dec. 2001
English, Scientific journal

High efficiency near-LR emission of Nd(III) based on low-vibrational environment in cages of nanosized zeolites
Y Wada; T Okubo; M Ryo; T Nakazawa; Y Hasegawa; S Yanagida
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 122, 35, 8583, 8584, Sep. 2000
English, Scientific journal

A new one-pot synthesis of bisperfluoroalkanesulfonylamides and bispentafluorobenzenesulfonylamide as potassium salts
K Sogabe; Y Hasegawa; Y Wada; T Kitamura; S Yanagida
CHEMISTRY LETTERS, 8, 944, 945, Aug. 2000, [Peer-reviewed]
English, Scientific journal

Remarkable luminescence of novel Nd(III) complexes with low-vibrational hexafluoroacetylacetone and DMSO-d(6) molecules
S Yanagida; Y Hasegawa; Y Wada
JOURNAL OF LUMINESCENCE, 87-9, 995, 998, May 2000
English, Scientific journal

Preparation of perfluorosulfonylimides from convenient one pot synthesis
K. Sogabe; Y. Hasegawa; Y. Wada; T. Kitamura; S. Yanagida
Chem. Lett., 944, 945, 2000

Luminescence of novel neodymium sulfonylaminate complexes in organic media
Y Hasegawa; T Ohkubo; K Sogabe; Y Kawamura; Y Wada; N Nakashima; S Yanagida
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 39, 2, 357, +, 2000
English, Scientific journal

Observation of neodymium electroluminescence
Y Kawamura; Y Wada; Y Hasegawa; M Iwamuro; T Kitamura; S Yanagida
APPLIED PHYSICS LETTERS, 74, 22, 3245, 3247, May 1999
English, Scientific journal

Enhanced luminescence of lanthanide(III) complexes in polymer matrices
Y Hasegawa; K Sogabe; Y Wada; T Kitamura; N Nakashima; S Yanagida
CHEMISTRY LETTERS, 1, 35, 36, 1999
English, Scientific journal

Enhanced emission of Nd3+ in liquid systems: Formation of symmetrical rigid shells of tightly solvated DMSO molecules and weakly coordinated low-vibrational beta-diketonato ligands
Y Hasegawa; M Iwamuro; K Murakoshi; Y Wada; R Arakawa; T Yamanaka; N Nakashima; S Yanagida
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 71, 11, 2573, 2581, Nov. 1998
English, Scientific journal

Luminescence of Nd3+ complexes with some asymmetric ligands in organic solutions
M Iwamuro; Y Hasegawa; Y Wada; K Murakoshi; N Nakashima; T Yamanaka; S Yanagida
JOURNAL OF LUMINESCENCE, 79, 1, 29, 38, Jul. 1998
English, Scientific journal

Strategies for enhancing photoluminescence of Nd3+ in liquid media
S Yanagida; Y Hasegawa; K Murakoshi; Y Wada; N Nakashima; T Yamanaka
COORDINATION CHEMISTRY REVIEWS, 171, 461, 480, Apr. 1998
English, Scientific journal

Novel channel-type inclusion compounds of 3-epiursodeoxycholic acid
Y Miyake; J Hirose; Y Hasegawa; K Sada; M Miyata
CHEMICAL COMMUNICATIONS, 1, 111, 112, Jan. 1998
English, Scientific journal

Luminescence properties of Nd3+ and Yb3+ complexes in organic solvents for liquid laser medium
J. Kim; N. Nakashima; Y. Hasegawa; Y. Wada; S. Yanagida; T. Yamanaka
Rev. Laser Eng., 26, 691, 1998

First observation of photosensitized luminescence of Nd3+ in organic solution
M Iwamuro; Y Hasegawa; Y Wada; E Murakoshi; T Kitamura; N Nakashima; T Yamanaka; S Yanagida
CHEMISTRY LETTERS, 10, 1067, 1068, 1997
English, Scientific journal

Characteristic emission of beta-diketonato Nd3+ complexes dressed with perfluoroalkyl groups in DMSO-d(6)
Y Hasegawa; K Murakoshi; Y Wada; JH Kim; N Nakashima; T Yamanaka; S Yanagida
CHEMICAL PHYSICS LETTERS, 260, 1-2, 173, 177, Sep. 1996
English, Scientific journal

Enhanced emission of deuterated tris(hexafluoroacetylacetonato)neodymium(III) complex in solution by suppression of radiationless transition via vibrational excitation
Y Hasegawa; Y Kimura; K Murakoshi; Y Wada; JH Kim; N Nakashima; T Yamanaka; S Yanagida
JOURNAL OF PHYSICAL CHEMISTRY, 100, 24, 10201, 10205, Jun. 1996
English, Scientific journal

Enhancement of luminescence of Nd3+ complexes with deuterated hexafluoroacetylacetonato ligands in organic solvent
Y Hasegawa; K Murakoshi; Y Wada; S Yanagida; JH Kim; N Nakashima; T Yamanaka
CHEMICAL PHYSICS LETTERS, 248, 1-2, 8, 12, Jan. 1996
English, Scientific journal

PREPARATION AND PROPERTIES OF (ETA(5)-PENTAMETHYLCYCLOPENTADIENYL) IRON CATIONIC COMPLEXES WITH LONG-CHAIN ALKYL-GROUPS
Y HASEGAWA; T FUJINAMI; S SAKAI
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 66, 10, 3116, 3119, Oct. 1993
English

OPTICAL CHARACTERIZATION OF DEEP LEVELS IN SINGLE-CRYSTALS OF CUGAS2 GROWN BY CHEMICAL VAPOR TRANSPORT
K TANAKA; K ISHII; S MATSUDA; Y HASEGAWA; K SATO
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 28, 1, 12, 15, Jan. 1989
English, Scientific journal

HEXAAMMINECOBALT(III) HYDROGEN-ION EXCHANGE IN ALPHA-ZIRCONIUM AND THETA-ZIRCONIUM PHOSPHATES WITH VARIOUS PARTICLE-SIZE DISTRIBUTION
Y HASEGAWA; K FUJITA
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 58, 5, 1535, 1538, 1985, [Peer-reviewed]
English, Scientific journal

Eu(III)錯体の励起状態ダイナミクスにおける金属イオン添加効果
井下太地; ワン メンフィ; ワン メンフィ; 北川裕一; 北川裕一; 長谷川靖哉; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 35th, 2024

界面活性剤をモジュレーターとした発光性Eu(III)配位高分子の結晶形態制御
榎戸雅基; ワン メンフィ; ワン メンフィ; 北川裕一; 北川裕一; 長谷川靖哉; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 35th, 2024

時間に依存した残光色変化を示すEu^III/Tb^III/Gd^III錯体混晶
田崎芹夏; 中井拓真; ワン メンフィ; ワン メンフィ; 長谷川靖哉; 長谷川靖哉; 北川裕一; 北川裕一, 配位化合物の光化学討論会講演要旨集, 35th, 2024

テトラキス型キラルEu(III)錯体のπ-4f電荷移動励起状態に基づくキラル光学特性
滝沢諒平; 富川虎乃輔; 板谷康佑; 中井拓真; ワン メンフィ; ワン メンフィ; 小林正人; 小林正人; 武次徹也; 武次徹也; 長谷川靖哉; 長谷川靖哉; 北川裕一; 北川裕一, 配位化合物の光化学討論会講演要旨集, 35th, 2024

メチル基を導入した4,4’-ビピリジンを配位子に有するTb(III)錯体の構造と光物性
山口優作; 王夢菲; 王夢菲; 北川裕一; 長谷川靖哉; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会(Web), 2024, 2024

二種の連結配位子の混合比変調によるEu(III)配位高分子の発光機能
春川美友; WANG Mengfei; 庄司淳; 伏見公志; 北川裕一; 長谷川靖哉; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 34th, 2023

ヘキサフルオロアセチルアセトナートを有するセリウム錯体の電荷移動発光
富川虎乃輔; ワン メンフィ; 庄司淳; 赤間知子; 小林正人; 小林正人; 伏見公志; 中西貴之; 武次徹也; 武次徹也; 長谷川靖哉; 長谷川靖哉; 北川裕一; 北川裕一, 配位化合物の光化学討論会講演要旨集, 34th, 2023

二種の光増感剤を有するEu(III)錯体のエネルギー移動経路に依存した円偏光発光特性
板谷康佑; 鶴井真; ワン メンフィ; 庄司淳; 伏見公志; 長谷川靖哉; 長谷川靖哉; 北川裕一; 北川裕一, 配位化合物の光化学討論会講演要旨集, 34th, 2023

静電気励起に基づく希土類錯体の発光機能創出
稲毛康太; 平井悠一; 中西貴之; 王夢菲; 王夢菲; 長谷川靖哉; 長谷川靖哉; 北川裕一, 配位化合物の光化学討論会講演要旨集, 34th, 2023

Charge transfer emission of Ce(III) complexes with β-diketonate ligands
富川虎乃輔; 庄司淳; 庄司淳; 赤間知子; 小林正人; 小林正人; 伏見公志; 中西貴之; 武次徹也; 武次徹也; 長谷川靖哉; 長谷川靖哉; 北川裕一; 北川裕一, 希土類, 82, 2023

Molecular Recognition and Luminescent Properties of Supramolecular Cage Organized by Porphyrin and Yb(III) Complex
庄司淳; 細谷祥太; 中西貴之; 小林正人; 小林正人; 伏見公志; 北川裕一; 北川裕一; 武次徹也; 武次徹也; 長谷川靖哉; 長谷川靖哉, 基礎有機化学討論会要旨集, 33rd (CD-ROM), 2023

Highly Efficient Luminescent Eu(III) Complexes with Arsine Oxide
下地陽稀; 藤井俊樹; 隅田滉史; 北川裕一; 北川裕一; 長谷川靖哉; 長谷川靖哉; 井本裕顕; 中建介, 錯体化学会討論会講演要旨集, 72nd (CD-ROM), 2022

Estimating cancer cell activity using luminescent Eu(III) complex
WANG Mengfei; KONO Masaya; SHOJI Sunao; KITAGAWA Yuichi; FUSHIMI Koji; TSUDA Masumi; TANAKA Shinya; HASEGAWA Yasuchika, 錯体化学会討論会講演要旨集, 72nd (CD-ROM), 2022

Circularly polarized luminescence based on lanthanide coordination nanoparticles binding with DNA
佐々木建晟; 庄司淳; 庄司淳; 北川裕一; 中村一希; 小林範久; 伏見公志; 長谷川靖哉; 長谷川靖哉, 希土類, 80, 2022

発光性希土類配位ナノ粒子のDNAによる機能化
佐々木建晟; 庄司淳; 庄司淳; 北川裕一; 中村一希; 小林範久; 伏見公志; 長谷川靖哉; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 33rd, 2022

ベンゾイミダゾール部位を含む希土類配位ナノ粒子の合成と光物性
佐々木建晟; 庄司淳; 庄司淳; 北川裕一; 北川裕一; 中村一希; 小林範久; 伏見公志; 長谷川靖哉; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 32nd, 2021

Effect of a light wavelength conversion film using rare earth complex on growth of hydroponic cultured swiss chard
櫻井結希穂; 冨田琴乃; 実山豊; 鈴木卓; 庄司淳; 長谷川靖哉, 園芸学研究 別冊, 20, 1, 2021

Olefin-accelerated C-N cross-coupling in the solid-state
Koji Kubota; Tamae Seo; Katsumasa Koide; Yasuchika Hasegawa; Hajime Ito, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 258, Aug. 2019
English, Summary international conference

炭素鋼表面に形成したアノード酸化皮膜の金属組織依存性
中川凌吾; 北川裕一; 長谷川靖哉; 伏見公志, 表面技術協会講演大会講演要旨集, 138th, 207, 31 Aug. 2018
Japanese

純鉄への電気化学的水素侵入挙動に対する溶液流れの影響
山本悠大; 北川裕一; 長谷川靖哉; 伏見公志, 表面技術協会講演大会講演要旨集, 138th, 20, 31 Aug. 2018
Japanese

液中イオン銃を用いた溶液局所酸性化と金属材料表面の局部硫化
中辻慧; 北川裕一; 長谷川靖哉; 伏見公志, 表面技術協会講演大会講演要旨集, 138th, 175, 31 Aug. 2018
Japanese

トリフェニルアミン型三座リンカーを用いた新規Eu(III)錯体の合成と物性評価
佐藤奈津美; 北川裕一; 伏見公志; 長谷川靖哉, 高分子学会予稿集(CD-ROM), 67, 2, ROMBUNNO.3E03, 29 Aug. 2018
Japanese

希土類配位高分子結晶の物質機能設計
中西貴之; 沢登拓矢; 松田賢司; 北川裕一; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 30th, 14‐15, 14 Jul. 2018
Japanese

カルボランが導入されたEu(III)二核錯体の合成と発光特性
齋藤康樹; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 30th, 102‐103, 14 Jul. 2018
Japanese

力学刺激発光を示す希土類配位高分子結晶への配位子置換
松田賢司; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 30th, 98‐99, 14 Jul. 2018
Japanese

CaSナノ粒子に固定化されたEu(III)錯体の発光特性
沢登拓矢; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 30th, 66‐67, 14 Jul. 2018
Japanese

異なるホスフィンオキシド配位子の導入によるTb(hfa)₃錯体の逆エネルギー移動過程への影響
山本昌紀; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 30th, 16‐17, 14 Jul. 2018
Japanese

外部環境に依存したキラルEu(III)錯体のCPL特性
和田智志; 北川裕一; 中西貴之; 権正行; 田中一生; 伏見公志; 中條善樹; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 30th, 68‐69, 14 Jul. 2018
Japanese

大きなモル吸光係数を持つ高輝度Eu(III)錯体の最適な設計とその合成
熊谷まりな; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 30th, 110‐111, 14 Jul. 2018
Japanese

磁気円偏光二色性を用いた希土類錯体の電子軌道解析
北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 68th, 240, 10 Jul. 2018
Japanese

Eu金属を前駆体とした発光性Eu(II)ナノ粒子の合成
小出克将; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 希土類, 72, 30‐31, 08 May 2018
Japanese

ホスフィンオキシド配位子にエチニル基を導入した七配位Tb(III)錯体の光増感エネルギー移動発光
DA ROSA Pedro; Paulo Ferreira; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 希土類, 72, 124‐125, 08 May 2018
Japanese

液中イオン銃を用いた金属材料表面近傍の局所酸性化
中辻慧; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境講演集, 2018, 227‐228, 27 Apr. 2018
Japanese

電気化学エリプソ顕微鏡によるFe‐Cr二元系合金のアノード溶解挙動の観察
伏見公志; 金澤友美; 北川裕一; 中西貴之; 長谷川靖哉; 土井教史, 電気化学会大会講演要旨集(CD-ROM), 85th, ROMBUNNO.1R06, 23 Feb. 2018
Japanese

ピレン型多座配位子を有する新規Yb(III)配位高分子の合成と光物性
松井貴文; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 高分子学会北海道支部研究発表会講演要旨集, 52nd, 20, 15 Jan. 2018
Japanese

立体選択的アルドール反応を触媒する人工キラル亜鉛錯体の配位構造と反応機構の解析
園池昇太郎; 菊地千陽; 畑中美穂; 北川裕一; 長谷川靖哉; 嵯峨裕; 青木伸; 青木伸, 日本薬学会関東支部大会講演要旨集, 62nd, 2018

中性水溶液中において炭素鋼表面に形成するアノード酸化皮膜のミクロ観察
中川凌吾; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 化学系学協会北海道支部冬季研究発表会(Web), 2018, ROMBUNNO.2B09 (WEB ONLY), 2018
Japanese

トリフェニルアミン型三座リンカーを用いた新規Eu(III)錯体の合成と光物性
佐藤奈津美; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会(Web), 2018, ROMBUNNO.1C06 (WEB ONLY), 2018
Japanese

七配位Tb(III)錯体の光増感エネルギー移動
PAULO Ferreira; da Rosa Pedro; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会(Web), 2018, ROMBUNNO.1C05 (WEB ONLY), 2018
Japanese

π拡張系β‐ジケトナト配位子を有する高熱安定性ユウロピウム単核錯体の発光特性
小飯塚徹; 小飯塚徹; 山本昌紀; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会(Web), 2018, ROMBUNNO.P017 (WEB ONLY), 2018
Japanese

炭素鋼中パーライト相上に形成する不働態皮膜の微小電気化学測定
中川凌吾; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境討論会講演集, 64th, 527‐528, 18 Oct. 2017
Japanese

電気化学エリプソ顕微鏡による鉄基二元系合金表面のその場観察
金澤友美; 土井教史; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境討論会講演集, 64th, 45‐46, 18 Oct. 2017
Japanese

トリフェニレン骨格を導入したユウロピウム(III)錯体の合成と光物性
鈴江郁哉; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 67th, 356, 01 Sep. 2017
Japanese

ピレン型多座配位子を有するYb(III)配位高分子の合成と発光特性
松井貴文; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 67th, 357, 01 Sep. 2017
Japanese

円偏光発光特性を示すEu(III)錯体の高分子化による発光特性変化
三浦由衣; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 67th, 358, 01 Sep. 2017
Japanese

嵩高いジケトナト配位子を有する多核Tb(III)錯体の合成と光物性
FERREIRA DA ROSA; Pedro Paulo; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 67th, 247, 01 Sep. 2017
Japanese

局所電気化学測定による金属組織に依存した不働態皮膜の評価
中川凌吾; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 電気化学秋季大会講演要旨集(CD‐ROM), 2017, ROMBUNNO.2F19, 28 Aug. 2017
Japanese

局部光電気化学反応によるチタン酸化物皮膜の変質と表面処理
金澤友美; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 電気化学秋季大会講演要旨集(CD‐ROM), 2017, ROMBUNNO.2F18, 28 Aug. 2017
Japanese

九核希土類クラスターにおけるエネルギー移動と発光特性に関する研究
大曲駿; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 応用物理学会秋季学術講演会講演予稿集(CD-ROM), 78th, ROMBUNNO.7p‐A414‐1, 25 Aug. 2017
Japanese

蓄光性セラミックスにおける光電流特性の検討
角野祐貴; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 応用物理学会秋季学術講演会講演予稿集(CD-ROM), 78th, ROMBUNNO.7p‐A414‐2, 25 Aug. 2017
Japanese

T₁準位が高くなるπ共役拡張法とEu(III)錯体の高輝度発光
鈴江郁哉; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 29th, 74‐75, 05 Aug. 2017
Japanese

LMCTを示すカンファーEu(III)錯体の溶媒に依存したキラル化学特性
和田智志; 北川裕一; 中西貴之; 権正行; 田中一生; 伏見公志; 中條善樹; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 29th, 32‐33, 05 Aug. 2017
Japanese

Photo-functional Properties of stacked Lanthanide coordination Polymers with Triangular Spacer Ligands
長谷川靖哉; 中西貴之; 北川裕一; 伏見公志, 高分子学会予稿集(CD-ROM), 66, 1, ROMBUNNO.3H13, 15 May 2017
Japanese

強発光機能を有するキラル型希土類錯体ポリマーの開発
三浦由衣; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 希土類, 70, 68‐69, 08 May 2017
Japanese

希土類配位高分子の微細構造評価
袴田翔; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 希土類, 70, 66‐67, 08 May 2017
Japanese

流速正弦波制御を用いた金属中における水素透過の時間依存測定
山本悠大; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境講演集, 2017, 379‐380, 30 Apr. 2017
Japanese

炭素鋼表面に形成する不働態皮膜のミクロ観察
中川凌吾; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境講演集, 2017, 81‐82, 30 Apr. 2017
Japanese

高分子化によるEu(III)錯体の光増感発光の向上
三浦由衣; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 応用物理学会春季学術講演会講演予稿集(CD-ROM), 64th, ROMBUNNO.16p‐P7‐15, 01 Mar. 2017
Japanese

蓄光性セラミックスEu²⁺:SrAl₂O₄の光電流特性
角野祐貴; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 日本セラミックス協会年会講演予稿集(CD-ROM), 2017, ROMBUNNO.3D20, 01 Mar. 2017
Japanese

テルビウムとガドリニウムを混合した九核希土類クラスターにおけるエネルギー移動と発光特性
大曲駿; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 応用物理学会春季学術講演会講演予稿集(CD-ROM), 64th, ROMBUNNO.14p‐411‐10, 01 Mar. 2017
Japanese

Photo-functional Properties and Imaging Applications using Luminescent Lanthanide complexes
長谷川 靖哉; 中西 貴之, Imaging Conference Japan論文集, 43, 45, 2017
日本画像学会, Japanese

希土類錯体の4f‐5d遷移とLMCT遷移に基づく磁気光学効果の検出
北川裕一; 和田智志; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会要旨集(CD-ROM), 2017, ROMBUNNO.1B17, 2017
Japanese

チタンの耐食性に対する光電気化学的表面処理の効果
金澤友美; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境討論会講演集, 63rd, 375‐376, 30 Sep. 2016
Japanese

大きな磁気円偏光二色性強度を示す分子設計
北川裕一; 和田智志; 柳澤慧; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 66th, 234, 30 Aug. 2016
Japanese

ヘリセンを配位子として導入したユーロピウム錯体の発光特性とその溶媒依存性
大野良輔; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 66th, 235, 30 Aug. 2016
Japanese

キラル部位を有するユウロピウム錯体ポリマーの構造と光物性
三浦由衣; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 66th, 232, 30 Aug. 2016
Japanese

強発光を示すEu‐Polyoxometalateのフォトクロミック挙動
岡井翼; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM), 29th, ROMBUNNO.2C03, 29 Aug. 2016
Japanese

希土類サイトバリエーションを持つSr₃Al₂O₆:Ln(III)結晶の光物性
松井貴文; 中西貴之; 北川裕一; 伏見公志; 樋口幹雄; 長谷川靖哉, 日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM), 29th, ROMBUNNO.2PC18, 29 Aug. 2016
Japanese

架橋および終端ホスフィンオキシドを含む発光性Eu(III)錯体ポリマー
中島綾子; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 高分子学会予稿集(CD-ROM), 65, 2, ROMBUNNO.2Pf066, 24 Aug. 2016
Japanese

剛直な三次元骨格構造を有する耐熱性Eu(III)錯体ポリマー
中島綾子; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 28th, 26‐27, 08 Aug. 2016
Japanese

希土類二核錯体における発光色の時間変化
柳澤慧; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 28th, 174‐175, 08 Aug. 2016
Japanese

Jタイプ励起子相互作用を利用した配位型カルバゾール誘導体のCT性発光
矢地莉勇人; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 28th, 120‐121, 08 Aug. 2016
Japanese

Luminescent Lanthanide Coordination Polymers for Future Photonics
長谷川 靖哉, 科学と工業 = Science and industry, 90, 6, 174, 181, Jun. 2016
大阪工研協会, Japanese

強発光を示す希土類錯体ポリマーのナノ粒子化と表面保護
長谷川靖哉; 小野寺宏光; 中西貴之; 北川裕一; 伏見公志, 高分子学会予稿集(CD-ROM), 65, 1, ROMBUNNO.3L17, 10 May 2016
Japanese

アノード酸化チタンの皮膜厚分布に対するUV光照射の影響
金澤友美; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 電気化学会大会講演要旨集(CD-ROM), 83rd, ROMBUNNO.1D12, 23 Mar. 2016
Japanese

炭素鋼の動電位分極曲線に対する添加アニオンの影響
西村基; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 電気化学会大会講演要旨集(CD-ROM), 83rd, ROMBUNNO.1D04, 23 Mar. 2016
Japanese

ユーロピウム錯体ポリマーを用いた有機発光ダイオードの作製
福留淳; 高田誠; 菅原猛司; 名取詩織; 長谷川靖哉; 永瀬隆; 永瀬隆; 小林隆史; 小林隆史; 内藤裕義; 内藤裕義, 応用物理学会秋季学術講演会講演予稿集(CD-ROM), 77th, 2016

優れた耐熱性を有する希土類錯体ポリマーの合成とその応用
中島綾子; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会講演要旨集(CD-ROM), 2016, ROMBUNNO.1C07, 2016
Japanese

酸性溶液中の鉄の腐食抑制反応における電極の幾何学の影響
西村基; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境討論会講演集, 62nd, 463, 464, 20 Oct. 2015
Japanese

不働態鉄表面のSECM観察用レドックスメディエータの検討と適用
後藤優明; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境討論会講演集, 62nd, 457, 458, 20 Oct. 2015
Japanese

多結晶純鉄上に形成した熱酸化皮膜の光学的および電気化学的解析
高畠勇; 北川裕一; 中西貴之; 長谷川靖哉; 伏見公志, 材料と環境討論会講演集, 62nd, 345, 346, 20 Oct. 2015
Japanese

EuS‐CaS全率固溶体ナノ結晶における磁気光学物性の検討
中西貴之; 中島綾子; 北川裕一; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2015, CD-ROM, ROMBUNNO.3P091, 08 Sep. 2015
Japanese

希土類錯体の配位子に依存した磁気円偏光二色性強度
北川裕一; 和田智志; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2015, CD-ROM, ROMBUNNO.3C13, 08 Sep. 2015
Japanese

四座型カルバゾールユニットを含むユウロピウム(III)配位ポリマーの合成と発光特性評価
名取詩織; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2015, CD-ROM, ROMBUNNO.1P102, 08 Sep. 2015
Japanese

有機配位子を含むEu(III)ポリオキソメタレートのフォトクロミック効果と発光特性
岡井翼; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2015, CD-ROM, ROMBUNNO.3P071, 08 Sep. 2015
Japanese

フッ化テルビウムナノ結晶の合成と光磁気特性
川島祥; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM), 28th, ROMBUNNO.2PN05, 01 Sep. 2015
Japanese

EuをドープしたCaSナノ結晶の発光および磁気光学特性
中島綾子; 中西貴之; 川島祥; 北川裕一; 伏見公志; 長谷川靖哉, 日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM), 28th, ROMBUNNO.2PN04, 01 Sep. 2015
Japanese

配位子に依存した希土類錯体の磁気円偏光二色性
北川裕一; 和田智志; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 65th, 223, 01 Sep. 2015
Japanese

高温領域で発光を示すEu(III)錯体ポリマー
中島綾子; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 27th, 130, 131, 07 Aug. 2015
Japanese

β‐ジケトナトを含むEu(III)ポリオキソメタレートのフォトクロミック挙動と光物性
岡井翼; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 27th, 104, 105, 07 Aug. 2015
Japanese

発光性Eu(III)錯体におけるπ共役系を拡張した配位子の新規設計指針・合成とその光物性
大野良輔; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 27th, 134, 135, 07 Aug. 2015
Japanese

7配位ランタニド錯体の構築と強発光化
柳澤慧; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 27th, 20, 21, 07 Aug. 2015
Japanese

Study on Lanthanide Nanomaterials with Characteristic Photofunctional Properties
長谷川 靖哉, 化學工業, 66, 7, 477, 484, Jul. 2015
小峰工業出版, Japanese

チオフェン誘導体で架橋したEu(III)錯体の物性評価
平井悠一; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 希土類, 66, 80, 81, 14 May 2015
Japanese

酸化テルビウムナノ粒子の磁気およびファラデー回転特性
川島祥; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 希土類, 66, 160, 161, 14 May 2015
Japanese

Euを添加したCaSナノ結晶の合成とその磁気光学効果
中西貴之; 中島綾子; 川島祥; 北川裕一; 伏見公志; 長谷川靖哉, 希土類, 66, 162, 163, 14 May 2015
Japanese

七配位構造を有する希土錯体の光物性評価
柳澤慧; 中西貴之; 北川裕一; 関朋宏; 伏見公志; 伊藤肇; 長谷川靖哉, 希土類, 66, 82, 83, 14 May 2015
Japanese

流速正弦波制御を用いた鋼板中の水素拡散係数の測定
山本悠大; 神実紗子; 伏見公志; 中西貴之; 北川裕一; 長谷川靖哉, 材料と環境講演集, 2015, 273, 274, 30 Apr. 2015
Japanese

酸性硫酸ナトリウム水溶液中の鉄不働態化挙動の電極サイズ依存性
西村基; 伏見公志; 中西貴之; 長谷川靖哉; 小寺史浩, 材料と環境講演集, 2015, 235, 236, 30 Apr. 2015
Japanese

二種類の配位サイトで構成されるEu(III)錯体ポリマーの合成と発光特性
中島綾子; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 95th, 2, 352, 11 Mar. 2015
Japanese

ヘリセン配位子を有する希土類錯体の合成と発光特性
大野良輔; 北川裕一; 中西貴之; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 95th, 2, 351, 11 Mar. 2015
Japanese

タングステン酸を骨格とするEu(III)クラスターの光増感発光
岡井翼; 中西貴之; 北川裕一; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 95th, 2, 352, 11 Mar. 2015
Japanese

赤外発光を示すアントラセン金(I)イソシアニド錯体の光学特性と結晶構造
戸子台遥光; 関朋宏; 大曲駿; 中西貴之; 長谷川靖哉; 伊藤肇, 日本化学会講演予稿集, 95th, 3, 643, 11 Mar. 2015
Japanese

小規模微小電極アレイ上に形成される拡散層の数値計算
山本悠大; 伏見公志; 中西貴之; 北川裕一; 長谷川靖哉, 電気化学会大会講演要旨集(CD-ROM), 82nd, ROMBUNNO.1P10, 09 Mar. 2015
Japanese

不働態鉄表面のSECM観察用レドックスメディエータの検討
後藤優明; 伏見公志; 北川裕一; 中西貴之; 長谷川靖哉, 電気化学会大会講演要旨集(CD-ROM), 82nd, ROMBUNNO.3P11, 09 Mar. 2015
Japanese

多結晶純鉄上に形成した熱酸化皮膜の不均一性
高畠勇; 伏見公志; 北川裕一; 中西貴之; 長谷川靖哉, 電気化学会大会講演要旨集(CD-ROM), 82nd, ROMBUNNO.3P12, 09 Mar. 2015
Japanese

Auプラズモン電場増強効果によるEuSナノ結晶の光磁気特性変化
川島祥; 中西貴之; 藤田晃司; 田中勝久; 伏見公志; 長谷川靖哉, 日本セラミックス協会年会講演予稿集(CD-ROM), 2015, ROMBUNNO.1P085, 06 Mar. 2015
Japanese

微小電気化学法を用いた炭素鋼板へ侵入・透過する水素の局部測定
神実紗子; 伏見公志; 山本悠大; 北川裕一; 中西貴之; 長谷川靖哉, 材料と環境討論会講演集, 61st, 411, 412, 12 Nov. 2014
Japanese

私の自慢 希土類光化学の研究進化 : 様々な環境で研究を続ける
長谷川 靖哉, 化学と工業 = Chemistry & chemical industry, 67, 11, 993, 995, Nov. 2014
日本化学会, Japanese

二次元型ユウロピウム(III)配位ポリマーの強発光特性
立野栞; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 64th, 243, 01 Sep. 2014
Japanese

分極性の異なるホスフィンオキシド単座配位子を用いたEu(III)錯体の光物性検討
中西貴之; 大久保智樹; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 64th, 141, 01 Sep. 2014
Japanese

ルテノセン部位を有する希土類錯体の発光特性
長谷川靖哉; 佐藤奈緒; 中西貴之; 伏見公志, 錯体化学会討論会講演要旨集, 64th, 141, 01 Sep. 2014
Japanese

位置異性配位子を有する発光性Eu(III)錯体の形態制御
平井悠一; 中西貴之; 関朋宏; 伊藤肇; 佐藤敏文; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 64th, 20, 01 Sep. 2014
Japanese

Tb‐Ybを含む九核希土類クラスターにおける近赤外発光
中西貴之; 鈴木勇喜; 伏見公志; 長谷川靖哉, 日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM), 27th, ROMBUNNO.2PN12, 25 Aug. 2014
Japanese

テルビウムとガドリニウムで構成された九核ランタニドクラスターの発光メカニズム
大曲駿; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 26th, 120, 121, 06 Aug. 2014
Japanese

キラル配位子を導入した九核Tb(III)クラスターの光物性とファラデー効果特性
和田智志; 中西貴之; 北川裕一; 森崎泰弘; 藤田晃司; 田中勝久; 中條善樹; 小西克明; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 26th, 102, 103, 06 Aug. 2014
Japanese

金属錯体で架橋したEu(III)配位高分子の合成と光物性
山本昌紀; 中西貴之; 関朋宏; 伊藤肇; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 26th, 134, 135, 06 Aug. 2014
Japanese

Tb‐O骨格を有する無機分子の磁気光学効果
中西貴之; 鈴木勇喜; 土井貴弘; 日夏幸雄; 伏見公志; 長谷川靖哉, 希土類, 64, 132, 133, 15 May 2014
Japanese

酸化テルビウムナノ結晶の合成と光物性評価
川島祥; 中西貴之; 伏見公志; 長谷川靖哉, 希土類, 64, 110, 111, 15 May 2014
Japanese

三座配位子を有する二次元型ユウロピウム(III)錯体の集積化による高効率発光
立野栞; 中西貴之; 伏見公志; 長谷川靖哉, 希土類, 64, 166, 167, 15 May 2014
Japanese

Luminescent Materials Chemistry Based on Lanthanide Complexes
長谷川 靖哉, 化學工業, 65, 5, 348, 354, May 2014
小峰工業出版, Japanese

鋼板水素透過現象に対する水素発生面の物質輸送が及ぼす影響
神実紗子; 伏見公志; 中西貴之; 長谷川靖哉; 河野崇史; 木村光男, 材料と環境講演集, 2014, 371, 372, 30 Apr. 2014
Japanese

硫酸中における純鉄の結晶面方位に依存した腐食挙動
高畠勇; 伏見公志; 中西貴之; 長谷川靖哉, 材料と環境講演集, 2014, 195, 198, 30 Apr. 2014
Japanese

不働態二相炭素鋼表面の不均一性
柳澤慧; 伏見公志; 中西貴之; 長谷川靖哉; 河野崇史; 木村光男, 材料と環境講演集, 2014, 367, 368, 30 Apr. 2014
Japanese

硫酸中における結晶面方位に依存した鈍鉄の酸化皮膜形成
高畠勇; 伏見公志; 中西貴之; 長谷川靖哉, 電気化学会大会講演要旨集, 81st, 136, 29 Mar. 2014
Japanese

紫外線照射したアノード酸化チタン表面の偏光反射顕微鏡観察
伏見公志; 倉内和則; 中西貴之; 長谷川靖哉; 上田幹人; 大塚俊明, 電気化学会大会講演要旨集, 81st, 139, 29 Mar. 2014
Japanese

長鎖アルキル基を導入した九核Tb(III)クラスターの合成と光機能評価
大曲駿; 中西貴之; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 94th, 2, 422, 12 Mar. 2014
Japanese

キラル配位子を導入した九核Tb(III)クラスターの合成と光物性
和田智志; 中西貴之; 関朋宏; 伊藤肇; 小西克明; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 94th, 2, 422, 12 Mar. 2014
Japanese

平面四配位型Pd(II)錯体で架橋されたEu(III)配位高分子の合成と光物性
山本昌紀; 中西貴之; 関朋宏; 伊藤肇; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 94th, 2, 420, 12 Mar. 2014
Japanese

二相炭素鋼表面上に形成する不働態皮膜の不均一性
柳澤慧; 伏見公志; 中西貴之; 長谷川靖哉; 河野崇史; 木村光男, 表面技術協会講演大会講演要旨集, 129th, 61, 03 Mar. 2014
Japanese

多チャンネル微小電極アレイの作製とその電極特性評価
山本悠大; 伏見公志; 中西貴之; 長谷川靖哉; 齋藤美紀子; 本間敬之, 表面技術協会講演大会講演要旨集, 129th, 210, 03 Mar. 2014
Japanese

ステンレス鋼上に形成した不働態皮膜の経時変化
池山晴也; 伏見公志; 中西貴之; 長谷川靖哉, 表面技術協会講演大会講演要旨集, 129th, 267, 03 Mar. 2014
Japanese

メタロセン含有Eu(III)錯体の発光特性
佐藤奈緒; 伏見公志; 中西貴之; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会講演要旨集(CD-ROM), 2014, ROMBUNNO.1A08, 28 Jan. 2014
Japanese

九核Tb(III)クラスターの合成と光磁気特性
鈴木勇喜; 土井貴弘; 日夏幸雄; 関朋宏; 伊藤肇; 小泉均; 中西貴之; 伏見公志; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会講演要旨集(CD-ROM), 2014, ROMBUNNO.1A09, 28 Jan. 2014
Japanese

近赤外波長領域での吸収発光特性を示すポルフィリン積層π電子系の構築
星野佑紀; 清水正毅; 黒田裕久; 森末光彦; 松井淳; 中西貴之; 長谷川靖哉; 上村忍; 干場次朗; 佐々木園; 櫻井伸一, 光化学討論会要旨集(CD-ROM), 2014, 2014

化学還元によるCu/Pdナノクラスターの合成と蛍光特性
千葉仁嗣; 中西貴之; 長谷川靖哉; NGUYEN Thanh Mai; 石田洋平; 米澤徹, 光化学討論会要旨集(CD-ROM), 2014, 2014

Eu(II):CaSナノ結晶の合成とその光機能評価
中西貴之; 渡邊和音; 川島祥; 伏見公志; 長谷川靖哉, 光化学討論会要旨集(CD-ROM), 2014, ROMBUNNO.3P090, 2014
Japanese

自己集積型Eu(III)錯体の構造制御と光物性
平井悠一; 中西貴之; 関朋宏; 伊藤肇; 伏見公志; 長谷川靖哉, 光化学討論会要旨集(CD-ROM), 2014, ROMBUNNO.1B10, 2014
Japanese

希土類錯体ポリマー薄膜の光機能評価
菅原猛司; 中西貴之; 内藤裕義; 伏見公志; 長谷川靖哉, 光化学討論会要旨集(CD-ROM), 2014, ROMBUNNO.3P081, 2014
Japanese

酸化テルビウムナノ結晶の合成と光磁気特性
川島祥; 中西貴之; 伏見公志; O’BRIEN Paul; 長谷川靖哉, 光化学討論会要旨集(CD-ROM), 2014, ROMBUNNO.3P084, 2014
Japanese

スタッキングにより高次集積化されたユウロピウム(III)配位ポリマーの特異な発光特性
立野栞; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会要旨集(CD-ROM), 2014, ROMBUNNO.3P082, 2014
Japanese

九核ランタニドクラスターにおける発光メカニズムの解明
大曲駿; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会要旨集(CD-ROM), 2014, ROMBUNNO.1P087, 2014
Japanese

金属錯体で架橋されたEu(III)錯体ポリマーの光物性
山本昌紀; 中西貴之; 関朋宏; 伊藤肇; 伏見公志; 長谷川靖哉, 光化学討論会要旨集(CD-ROM), 2014, ROMBUNNO.3P091, 2014
Japanese

ジチオカルバメイト錯体を用いた赤色蛍光体CaSナノ結晶の合成
渡邊和音; 川島祥; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 63rd, 265, 15 Oct. 2013
Japanese

集積型ユーロピウム(III)錯体から構成される結晶の相転移挙動と発光特性
立野栞; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 63rd, 311, 15 Oct. 2013
Japanese

Tb‐Ybを含む九核希土類クラスターにおける近赤外発光機構の解明
中西貴之; 鈴木勇喜; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 63rd, 54, 15 Oct. 2013
Japanese

温度によって発光色が可変する希土類錯体ポリマー
長谷川靖哉; 宮田康平; 中西貴之; 小林厚志; 加藤昌子; 伏見公志, 錯体化学会討論会講演要旨集, 63rd, 54, 15 Oct. 2013
Japanese

フェロセニル界面活性剤を用いた発光性希土類錯体の電解薄膜形成
菅原猛司; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 63rd, 301, 15 Oct. 2013
Japanese

Eu(III)配位複合体の組織構造と発光特性
平井悠一; 中西貴之; 関朋宏; 伊藤肇; 佐藤敏文; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 63rd, 292, 15 Oct. 2013
Japanese

九核Tb(III)クラスターの構造と光磁気機能の解明
鈴木勇喜; 土井貴弘; 日夏幸雄; 関朋宏; 伊藤肇; 小泉均; 中西貴之; 伏見公志; 長谷川靖哉, 錯体化学会討論会講演要旨集, 63rd, 138, 15 Oct. 2013
Japanese

二相炭素鋼における腐食の微小電気化学的解析
柳澤慧; 伏見公志; 中西貴之; 長谷川靖哉; 河野崇史; 木村光男, 材料と環境討論会講演集, 60th, 75, 76, 10 Sep. 2013
Japanese

赤色発光を示すEuドープCaSナノ結晶の合成とその発光特性
渡邊和音; 川島祥; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2013, 187, 07 Sep. 2013
Japanese

Tb(III)とYb(III)を含む九核クラスターにおけるエネルギー移動と近赤外発光
中西貴之; 鈴木勇喜; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2013, 73, 07 Sep. 2013
Japanese

二次元配位子を有するユーロピウム(III)配位ポリマーの光物性とトリボルミネッセンス
立野栞; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2013, 123, 07 Sep. 2013
Japanese

プラズモン電場増強下におけるEuS‐Auナノ複合体の光磁気特性変化
川島祥; 中西貴之; 藤田晃司; 田中勝久; 小泉均; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2013, 58, 07 Sep. 2013
Japanese

ミセル電解法を用いた発光性ユーロピウム錯体の薄膜化
菅原猛司; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2013, 189, 07 Sep. 2013
Japanese

超分子型Eu(III)錯体の発光特性と構造転移
平井悠一; 中西貴之; 佐藤敏文; 覚知豊次; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2013, 124, 07 Sep. 2013
Japanese

光磁気特性を示す九核Tb(III)クラスターのスピン構造解析
鈴木勇喜; 土井貴弘; 日夏幸雄; 関朋宏; 伊藤肇; 小泉均; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2013, 187, 07 Sep. 2013
Japanese

EuS‐Auナノ複合体の形成による光磁気特性変化
川島祥; 中西貴之; 伏見公志; 長谷川靖哉, 希土類, 62, 118, 119, 16 May 2013
Japanese

希土類イオンを含む赤色蛍光体CaSナノ結晶の合成と発光特性
渡邊和音; 川島祥; 中西貴之; 伏見公志; 長谷川靖哉, 希土類, 62, 116, 117, 16 May 2013
Japanese

多チャンネル微小電極センサーによる水膜厚さの定量
伏見公志; 乙川陽子; 乙川陽子; 中西貴之; 長谷川靖哉, 材料と環境講演集, 2013, 269, 272, 30 Apr. 2013
Japanese

微小キャピラリセルを用いた純鉄の動電位および定電位アノード分極
高畠勇; 伏見公志; 中西貴之; 長谷川靖哉, 材料と環境講演集, 2013, 71, 72, 30 Apr. 2013
Japanese

炭素鋼板上で発生した水素侵入分布の微小電極を用いた測定
神実紗子; 伏見公志; 中西貴之; 長谷川靖哉; 河野崇史; 木村光男, 電気化学会大会講演要旨集, 80th, 367, 29 Mar. 2013
Japanese

微小キャピラリーセルを用いた二相炭素鋼の分極挙動
柳澤慧; 伏見公志; 中西貴之; 長谷川靖哉; 河野崇史; 木村光男, 電気化学会大会講演要旨集, 80th, 364, 29 Mar. 2013
Japanese

Ti不働態皮膜変質過程のin‐situ偏光反射イメージング
倉内和則; 伏見公志; 中西貴之; 長谷川靖哉; 大塚俊明, 電気化学会大会講演要旨集, 80th, 363, 29 Mar. 2013
Japanese

微小キャピラリセルを用いた純鉄の定電位アノード分極
高畠勇; 伏見公志; 中西貴之; 長谷川靖哉, 電気化学会大会講演要旨集, 80th, 366, 29 Mar. 2013
Japanese

ケイ素およびゲルマニウム架橋ビピリジルの発光特性の評価
村上和也; 大下浄治; 水雲智信; 中西貴之; 長谷川靖哉; 小林憲史; 東村秀之, 日本化学会中国四国支部大会講演要旨集, 2013, 2013

シート集積型ランタニド配位ポリマーの光物性とトリボルミネッセンス
立野栞; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 25th, 132, 133, 2013
Japanese

超分子型Eu(III)錯体の発光特性とアモルファス特性
平井悠一; 中西貴之; 佐藤敏文; 覚知豊次; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 25th, 104, 105, 2013
Japanese

九核テルビウム(III)クラスターの磁気光学特性
中西貴之; 鈴木勇喜; 関朋宏; 土井貴弘; 伏見公志; 日夏幸雄; 伊藤肇; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 25th, 54, 55, 2013
Japanese

希土類が拓く次世代光機能材料の創成
長谷川靖哉, 希土類, 61, 11-22, 22, 31 Oct. 2012
日本希土類学会, Japanese

希土類ナノ結晶を含む光学材料の開発
長谷川靖哉, ガラスおよびフォトニクス材料討論会講演要旨集, 53rd, 174-175, 25 Oct. 2012
Japanese

EuSナノ結晶添加ガラスの合成とその光磁気特性
前田将司; 中西貴之; 伏見公志; 長谷川靖哉, ガラスおよびフォトニクス材料討論会講演要旨集, 53rd, 92-93, 25 Oct. 2012
Japanese

Eu2⁺:SrAl₂O₄ガラスハイブリッド合成と発光スペクトル時間変化挙動
渡部和音; 中西貴之; 上田純平; 伏見公志; 田部勢津久; 長谷川靖哉, ガラスおよびフォトニクス材料討論会講演要旨集, 53rd, 96-97, 25 Oct. 2012
Japanese

無電解めっきを用いた微小電極配列構造体の作製と電極特性評価
乙川陽子; 中西貴之; 伏見公志; 長谷川靖哉, 表面技術協会講演大会講演要旨集, 126th, 20, 12 Sep. 2012
Japanese

偏光反射イメージングによる不働態チタン表面のin‐situ観察
倉内和則; 伏見公志; 中西貴之; 長谷川靖哉; 大塚俊明, 材料と環境討論会講演集, 59th, 215-216, 10 Sep. 2012
Japanese

ナフタレン含有ジチオールによるEuS会合体の形成と光物性
川島祥; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2012, 102, 07 Sep. 2012
Japanese

ホスフィンオキシド配位子を有する希土類配位高分子の発光の温度依存性
宮田康平; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2012, 59, 07 Sep. 2012
Japanese

Eu(III)錯体の発光特性における配位子分極性効果
大久保智樹; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2012, 267, 07 Sep. 2012
Japanese

九核Tb(III)クラスターの合成および磁気光学特性
鈴木勇喜; 土井貴弘; 日夏幸雄; 伊藤肇; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2012, 184, 07 Sep. 2012
Japanese

EuSガラスハイブリッドの合成とその光磁気特性
前田将司; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2012, 120, 07 Sep. 2012
Japanese

メタロセン含有Eu(III)錯体の電場応答発光
佐藤奈緒; 伊藤肇; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2012, 180, 07 Sep. 2012
Japanese

チタン不働態表面のin‐situ偏光反射イメージング
倉内和則; 中西貴之; 伏見公志; 長谷川靖哉; 大塚俊明, 光化学討論会講演要旨集, 2012, 155, 07 Sep. 2012
Japanese

残光性を有するEu無機蛍光体ガラスハイブリッド合成とその光学特性評価
渡邊和音; 中西貴之; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2012, 186, 07 Sep. 2012
Japanese

熱耐久性と強発光特性を有する希土類錯体ポリマー
長谷川靖哉; 宮田康平; 中西貴之; 伏見公志, 錯体化学会討論会講演要旨集, 62nd, 128, 01 Sep. 2012
Japanese

外部環境に応答したキラル希土類錯体の円偏光発光特性の変化
上野紘史; 湯浅順平; 長谷川靖哉; 河合壯, 配位化合物の光化学討論会講演要旨集, 24th, 107-108, 06 Aug. 2012
Japanese

電場応答型Eu(III)錯体の発光特性評価
佐藤奈緒; 伊藤肇; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 24th, 83-84, 06 Aug. 2012
Japanese

3次元ネットワーク構造を有する希土類配位高分子の発光特性評価
宮田康平; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 24th, 81-82, 06 Aug. 2012
Japanese

Micro-Fabrication of Titanium Surface using Flowing-Type Micro-Droplet-Cell
FUSHIMI KOJI; WATANABE HARUNORI; NAKANISHI TAKAYUKI; HASEGAWA YASUCHIKA, 表面技術, 63, 6, 375, 380, 01 Jun. 2012
表面技術協会, Japanese

Preparation and Optical Properties of Long-persistent SrAl_2O_4-based Glass-crystal Hybrid
NAKANISHI T; WATANABE K; FUSHIMI K; HASEGAWA Y, 希土類 = Rare earths, 0, 60, 140, 141, 08 May 2012
Japanese

Remarkable Opto-Magnetic Properties of EuS Nanocrystals with Gold Nanocrystals
KAWASHIMA Akira; MIYATA Kohei; NAKANISHI Takayuki; FUSHIMI Koji; HASEGAWA Yasuchika, 希土類 = Rare earths, 0, 60, 154, 155, 08 May 2012
Japanese

High luminescent Eu(III) complexs with low polarizeble ligands
OHKUBO T; NAKANISHI T; FUSHIMI K; HASEGAWA Y, 希土類 = Rare earths, 0, 60, 168, 169, 08 May 2012
Japanese

不働態チタン表面の偏光反射解析イメージング
伏見公志; 倉内和則; 中西貴之; 長谷川靖哉; 大塚俊明, 材料と環境講演集, 2012, 287, 288, 11 Apr. 2012
Japanese

偏光反射解析法による純Tiの不働態表面の観察
倉内和則; 伏見公志; 中西貴之; 長谷川靖哉; 大塚俊明, 電気化学会大会講演要旨集, 79th, 205, 29 Mar. 2012
Japanese

微小キャピラリセルを用いた純鉄の0.05M硫酸中における動電位アノード分極
高畠勇; 伏見公志; 中西貴之; 長谷川靖哉, 電気化学会大会講演要旨集, 79th, 206, 29 Mar. 2012
Japanese

残光性SrAl₂O₄結晶含有透明ガラスコンポジットの作製と光学特性評価
渡邊和音; 中西貴之; 伏見公志; 長谷川靖哉, 日本セラミックス協会年会講演予稿集, 2012, 92, 19 Mar. 2012
Japanese

Tb(III)クラスターの合成と光磁気特性評価
鈴木勇喜; 土井貴弘; 日夏幸雄; 伊藤肇; 中西貴之; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 92nd, 2, 470, 09 Mar. 2012
Japanese

ルテノセン含有ユーロピウム錯体の発光特性
佐藤奈緒; 伏見公志; 中西貴之; 長谷川靖哉, 日本化学会講演予稿集, 92nd, 2, 468, 09 Mar. 2012
Japanese

遷移金属イオンドープしたEuSナノ結晶の磁気光学特性
前田将司; 中西貴之; 土井貴弘; 日夏幸雄; 伏見公志; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会講演要旨集, 2012, 37, 31 Jan. 2012
Japanese

無電解めっきによる微小電極の作製
乙川陽子; 中西貴之; 伏見公志; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会講演要旨集, 2012, 76, 31 Jan. 2012
Japanese

分子間相互作用を有する希土類配位高分子の発光特性
宮田康平; 大場惟史; 小林厚志; 加藤昌子; 中西貴之; 伏見公志; 長谷川靖哉, 化学系学協会北海道支部冬季研究発表会講演要旨集, 2012, 36, 31 Jan. 2012
Japanese

Secm observation of polycrystalline iron corroding in sulphuric acid solution
K. Fushimi; K. Matsushita; H. Tachikawa; Y. Hasegawa, 18th International Corrosion Congress 2011, 2, 1223, 1230, 01 Dec. 2011

フロー型微小液滴セルを用いたチタン表面の微細電解加工
渡邊治憲; 伏見公志; 長谷川靖哉, 材料と環境討論会講演集, 58th, 199, 200, 16 Sep. 2011
Japanese

プラズモン電場増強下におけるEuS‐Auナノ複合体の光磁気特性評価
川島祥; 宮田康平; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2011, 46, 01 Sep. 2011
Japanese

光磁気特性を有するEuSナノ結晶への遷移金属ドープ
前田将司; 宮田康平; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2011, 51, 01 Sep. 2011
Japanese

ホスフィンオキシドで架橋された希土類配位高分子の構造と発光特性
宮田康平; 大場惟史; 小林厚志; 加藤昌子; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2011, 39, 01 Sep. 2011
Japanese

光磁気特性を示す新規ユーロピウム薄膜の電気化学合成
熊谷美那; 伏見公志; 長谷川靖哉, 光化学討論会講演要旨集, 2011, 50, 01 Sep. 2011
Japanese

分極性の異なった単座型ホスフィンオキシド配位子を有するEu(III)錯体の光物性評価
大久保智樹; 岸本眞一郎; 宮田康平; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 23rd, 82, 83, 04 Aug. 2011
Japanese

様々な有機溶媒中における8配位型Eu(III)錯体の発光特性評価
宮田康平; 中西貴之; 伏見公志; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 23rd, 38, 39, 04 Aug. 2011
Japanese

9配位構造を有するキラルEu(III)錯体の円偏光発光特性の評価
原田聖; 妻鳥紘之; 西山桂; 湯浅順平; 長谷川靖哉; 河合壯, 配位化合物の光化学討論会講演要旨集, 23rd, 120, 121, 04 Aug. 2011
Japanese

遷移金属イオンを含むEuSナノ結晶の合成と機能評価
前田将司; 宮田康平; 中西貴之; 伏見公志; 長谷川靖哉, 日本化学会北海道支部夏季研究発表会講演要旨集, 2011, 77, 01 Jul. 2011
Japanese

ジチオールで結合したEuS/Auナノ結晶複合体の光磁気特性
川島祥; 宮田康平; 中西貴之; 伏見公志; 長谷川靖哉, 日本化学会北海道支部夏季研究発表会講演要旨集, 2011, 76, 01 Jul. 2011
Japanese

硫酸酸性水溶液における純鉄腐食の面方位依存性
伏見公志; 松下兼一郎; 長谷川靖哉, 材料と環境講演集, 2011, 183, 184, 20 May 2011
Japanese

キラル希土類錯体の光学キラリティー
原田聖; 妻鳥紘之; 湯浅順平; 長谷川靖哉; 河合壯, シンポジウム「モレキュラー・キラリティー」講演要旨集, 2011, (JA)66,(EN)65, 20 May 2011
Japanese

Syntheses and luminescent properties of lanthanide coordination polymers with cross-linked phosphine oxide ligands
MIYATA Kohei; OHBA Tadashi; KOBAYASHI Atsushi; KATO Masako; FUSHIMI Koji; HASEGAWA Yasuchika, 希土類 = Rare earths, 0, 58, 102, 103, 05 May 2011
Japanese

pH2.3の硫酸ナトリウム水溶液中の多結晶鉄の不均一腐食挙動
伏見公志; 松下兼一郎; 長谷川靖哉, 電気化学会大会講演要旨集, 78th(CD-ROM), ROMBUNNO.1H21, 29 Mar. 2011
Japanese

EuS/Auナノ粒子会合体の合成と機能評価
川島祥; 宮田康平; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 91st, 3, 946, 11 Mar. 2011
Japanese

Euを含む無機薄膜の電気化学合成
熊谷美那; 宮田康平; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 91st, 3, 883, 11 Mar. 2011
Japanese

マンガンイオンを含むEuSナノ結晶の合成と機能評価
前田将司; 宮田康平; 伏見公志; 長谷川靖哉, 日本化学会講演予稿集, 91st, 3, 947, 11 Mar. 2011
Japanese

キラルな9配位Eu(III)錯体の配位構造に依存した円偏光発光特性
原田聖; 妻鳥紘之; 湯浅順平; 長谷川靖哉; 河合壯, 日本化学会講演予稿集, 91st, 2, 248, 11 Mar. 2011
Japanese

キラル配位子を有する非対称型希土類錯体の円偏光発光
長谷川靖哉; 原田聖; 河合壯, 日本化学会講演予稿集, 91st, 1, 185, 11 Mar. 2011
Japanese

キラルEu(III)錯体単結晶の結晶構造と円偏光発光計測
妻鳥紘之; 原田聖; 湯浅順平; 長谷川靖哉; 河合壯, 応用物理学関係連合講演会講演予稿集(CD-ROM), 58th, ROMBUNNO.26P-BK-9, 09 Mar. 2011
Japanese

Preparations and Photo-Physical Properties of Magnetic Semiconductor EuX Nanocrystals(Growth and Novel Functions of Nanocrystals)
Hasegawa Yasuchika; Kawai Tsuyoshi, Journal of the Japanese Association of Crystal Growth, 37, 4, 273, 280, Jan. 2011
Magnetic semiconductor, europium chalcogenide nanocrystals (EuX: EuO, EuS and EuSe nanocrystals), are characterized by the narrow 4f orbitals that exist as degenerate levels between the conduction band [5d orbitals of Eu (II)] and the valence band (p orbitals of O^<2->, S^<2-> and Se^<2->). The 4f-5d electronic transition and spin configuration of europium chalcogenide lead to significant photomagnetic effects, making these nanocrystals promising candidates as active materials in photo-magnetic devices. In this review, the syntheses and characteristic photophysical properties of europium ch..., The Japanese Association for Crystal Growth (JACG), Japanese

マルチバレル型f‐MDCの開発とアルミニウム合金の分極測定への応用
渡邊治憲; 伏見公志; 長谷川靖哉, 材料と環境討論会講演集, 57th, 364, 365, 08 Oct. 2010
Japanese

走査型電気化学顕微鏡(SECM)を用いた鉄の溶解挙動観察
松下兼一郎; 伏見公志; 長谷川靖哉, 材料と環境討論会講演集, 57th, 366, 367, 08 Oct. 2010
Japanese

硫酸水溶液における多結晶純鉄の不均一溶解
伏見公志; 熊谷美那; 宮元一成; 長谷川靖哉, 材料と環境討論会講演集, 57th, 368, 369, 08 Oct. 2010
Japanese

Development of lanthanide nanocrystals for future fiber-optic telecommunication systems
長谷川 靖哉, 化学工業, 61, 10, 744, 751, Oct. 2010
化学工業社, Japanese

キラルEu(III)錯体の配位構造の対称性に依存した円偏光発光特性
原田聖; 妻鳥紘之; 湯浅順平; 河合壯; 長谷川靖哉, 光化学討論会講演要旨集, 2010, 151, 08 Sep. 2010
Japanese

SG/TCモード走査型電気化学顕微鏡像高面分解能化のための微小電極プローブの開発
伏見公志; 松下兼一郎; 長谷川靖哉, 電気化学秋季大会講演要旨集, 2010, 70, 02 Sep. 2010
Japanese

Syntheses and luminescence properties of Sm(III) complexes with distorted 8-coordination structures
MIYATA Kohei; HASEGAWA Yasuchika; KAWAI Tsuyoshi, 希土類 = Rare earths, 0, 56, 10, 11, 20 May 2010
Japanese

Strategies for the coordination design of luminescent complexes
HASEGAWA Yasuchika, 希土類 = Rare earths, 0, 56, 138, 139, 20 May 2010
Japanese

キラルなビスオキサゾリンピリジン配位子を有するユーロピウム錯体の円偏光発光
湯浅順平; 大野智子; 宮田康平; 妻鳥紘之; 原田聖; 長谷川靖哉; 河合壯, 日本化学会講演予稿集, 90th, 2, 190, 12 Mar. 2010
Japanese

キラルEu(III)錯体の配位構造に依存した円偏光発光特性
原田聖; 河合壯; 長谷川靖哉, 日本化学会講演予稿集, 90th, 2, 556, 12 Mar. 2010
Japanese

次世代材料を創成する錯体化学 光機能を有する希土類錯体
長谷川靖哉; 中川哲也, 化学工業, 60, 8, 590, 595, 01 Aug. 2009
化学工業社, Japanese

Emission properties of nine-coordinated Eu(III) complexes with phosphine oxides
HASEGAWA Yasuchika; KAWAI Tsuyoshi, 希土類 = Rare earths, 0, 54, 72, 73, 21 May 2009
Japanese

Syntheses and emission properties of Eu(III) complexes with assymmetric tridentate phosphine oxide ligands
MIYATA Kohei; HASEGAWA Yasuchika; KAWAI Tsuyoshi, 希土類 = Rare earths, 0, 54, 74, 75, 21 May 2009
Japanese

Synthesis and Emission Properties of Photochromic Eu(III) Complex
NAKAGAWA Tetsuya; HASEGAWA Yasuchika; KAWAI Tsuyoshi, 希土類 = Rare earths, 0, 54, 76, 77, 21 May 2009
Japanese

発光素子への展開を目指した強発光希土類錯体の創製
中村一希; 長谷川靖哉; 小林範久, 日本写真学会秋季研究報告会講演要旨集, 2009, 2009

Development of photochromic lanthanide(3) complex
長谷川 靖哉; 中川 哲也; 河合 壯, 化学工業, 59, 11, 879, 883,892, Nov. 2008
化学工業社, Japanese

キラルなβ‐diketonato配位子を有するEu(III)錯体の配位構造による円偏光発光特性制御
原田聖; 河合壯; 中野陽子; 藤木道也; 内藤昌信; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 21st, 28, 29, 05 Aug. 2008
Japanese

Lanthanide nanocrystals having photo-magnetic properties
HASEGAWA Yasuchika, Photochemistry, 39, 1, 11, 18, 30 May 2008
光化学協会, Japanese

Synthesis and emission properties of Eu(III) complex with bipyridyl-typed phosphine ligand
HIEDA Ryo; HASEGAWA Yasuchika; KAWAI Tsuyoshi, 希土類 = Rare earths, 0, 52, 94, 95, 22 May 2008
Japanese

配位構造制御によるキラルEu(III)錯体の円偏光発光特性制御
原田聖; 河合壯; 中野陽子; 藤木道也; 内藤昌信; 長谷川靖哉, 日本化学会講演予稿集, 88th, 1, 289, 12 Mar. 2008
Japanese

Emission Properties of Sm(III) Complexes Having Deep-Red Emission Band
KAWAI Hideki; ZHAO Chen; TSURUOKA Shin-ichi; YOSHIDA Takahiko; HASEGAWA Yasuchika; KAWAI Tsuyoshi, IEICE technical report, 2008, 1, 77, 80, 24 Jan. 2008
Novel Sm(III) complexes were synthesized by the reaction of hexafluoroacetylacetonato (hfa) and triphenylphosphine oxide (TPPO), 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen). Emission bands were observed at "deep-red" region and were attributed to f-f transitions. The branching ratio (electric-dipole transitions 644 nm vs. magnetic dipole transition 598nm) of the Sm(hfa)_3(TPPO)_2 was much larger than that of Sm(hfa)_3(bpy)_2, Sm(hfa)_3(phen)_2. Those emission properties are due to coordination number and asymmetrical structures of novel Sm(III) complexes. Luminescent Sm(III) complexes appear to be the suitable candidate for enhancing color rendition of LED devices., The Institute of Electronics, Information and Communication Engineers, Japanese

Emission Properties of Sm(III) Complexes Having Deep-Red Emission Band
KAWAI Hideki; ZHAO Chen; TSURUOKA Shin-ichi; YOSHIDA Takahiko; HASEGAWA Yasuchika; KAWAI Tsuyoshi, IEICE technical report. Electronic information displays, 107, 453, 77, 80, 17 Jan. 2008
Novel Sm(III) complexes were synthesized by the reaction of hexafluoroacetylacetonato (hfa) and triphenylphosphine oxide (TPPO), 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen). Emission bands were observed at "deep-red" region and were attributed to f-f transitions. The branching ratio (electric-dipole transitions 644 nm vs. magnetic dipole transition 598nm) of the Sm(hfa)_3(TPPO)_2 was much larger than that of Sm(hfa)_3(bpy)_2, Sm(hfa)_3(phen)_2. Those emission properties are due to coordination number and asymmetrical structures of novel Sm(III) complexes. Luminescent Sm(III) complexes..., The Institute of Electronics, Information and Communication Engineers, Japanese

「第20回配位化合物の光化学討論会」および「配位化合物の光化学20周年記念講演会」報告
末延 知義; 長谷川 靖哉, 光化学 = Photochemistry, 38, 3, 215, 215, 15 Jan. 2008
Japanese

点不斉及び軸不斉配位子を組み合わせたEu(III)錯体の円偏光発光特性
原田聖; 河合壯; 中野陽子; 藤木道也; 内藤昌信; 長谷川靖哉, 光化学討論会講演要旨集, 2007, 134, 21 Sep. 2007
Japanese

C-13-3 Characteristics of organic light-emitting devices based on newly synthesized samarium complex
Kajii Hirotake; Kin Zenken; Hasegawa Yasuchika; Kawai Tsuyoshi; Ohmori Yutaka, Proceedings of the Society Conference of IEICE, 2007, 2, 103, 103, 29 Aug. 2007
The Institute of Electronics, Information and Communication Engineers, Japanese

不斉配位子を有する非対称型Eu(III)錯体の円偏光発光特性
原田聖; 河合壯; 中野陽子; 藤木道也; 内藤昌信; 長谷川靖哉, 配位化合物の光化学討論会講演要旨集, 20th, 137, 138, 07 Aug. 2007
Japanese

Deep-red luminescence of Sm(III) complex having nine coordination structure
HASEGAWA Yasuchika; TSURUOKA Shinichi; YOSHIDA Takahiko; KAWAI Hideki; KAWAI Tsuyoshi, 希土類 = Rare earths, 0, 50, 90, 91, 10 May 2007
Japanese

不斉配位子を有するEu(III)錯体の合成
原田聖; 中野陽子; 長谷川靖哉; 藤木道也; 河合壯, 日本化学会講演予稿集, 87th, 1, 609, 12 Mar. 2007
Japanese

Synthesis and photo-physical properties of EuSe nanoparticles by the thermal reduction of Eu(III) complexes
AFZAAL Mohammad; O'BRIEN Paul, 希土類 = Rare earths, 0, 48, 70, 71, 23 May 2006
Japanese

Creation of High Lasing Oscillation Lanthanide Complexes, and Development for Emitting Devices
KAWAI Hideki; NAKAMURA Kazuki; HASEGAWA Yasuchika; YASUDA Naoki; WADA Yuji; YANAGIDA Shozo, ITE technical report, 30, 18, 19, 22, 07 Mar. 2006
映像情報メディア学会, Japanese

Creation of High Lasing Oscillation Lanthanide Complexes, and Development for Emitting Devices
KAWAI Hideki; NAKAMURA Kazuki; HASEGAWA Yasuchika; YASUDA Naoki; WADA Yuji; YANAGIDA Shozo, Technical report of IEICE. OME, 105, 642, 19, 22, 28 Feb. 2006
The novel Eu (III) complexes with bis-phosphine which have narrowed emission band (full width at half maximum=2.1nm) and large Stimulated emission cross-section (1.80×10^<-2>cm^2), was synthesized. Geometric structures of novel Eu (III) complexes were determined by single-crystal X-ray diffraction. The emission from the edge of the polymer thin films decayed following single-exponential kinetics (τ=650μs). While the emission decays at high excitation energy given>0.1mJ consisted of normal component (τ=650μs) and a faster component (τ=83μs). The ratio of the faster component increased with i..., The Institute of Electronics, Information and Communication Engineers, Japanese

Creation of High Lasing Oscillation Lanthanide Complexes, and Development for Emitting Devices
KAWAI Hideki; NAKAMURA Kazuki; HASEGAWA Yasuchika; YASUDA Naoki; WADA Yuji; YANAGIDA Shozo, IEICE technical report. Electronic information displays, 105, 641, 19, 22, 28 Feb. 2006
The novel Eu (III) complexes with bis-phosphine which have narrowed emission band (full width at half maximum=2.1nm) and large Stimulated emission cross-section (1.80×10^<-20>cm^2), was synthesized. Geometric structures of novel Eu (III) complexes were determined by single-crystal X-ray diffraction. The emission from the edge of the polymer thin films decayed following single-exponential kinetics (τ=650μs). While the emission decays at high excitation energy given >0.1mJ consisted of normal component (τ=650μs) and a faster component (τ=83μs). The ratio of the faster component increased with..., The Institute of Electronics, Information and Communication Engineers, Japanese

強発光性Eu(III)錯体における吸収断面積が増幅自然放出光に及ぼす影響
中村一希; 長谷川靖哉; 川井秀記; 保田直紀; 塚原保徳; 和田雄二, 光化学討論会講演要旨集, 2006, 2006

Enhancement of Amplified Spontaneous Emission of Europium (III) Complexes by Enlargement of Absorption Cross Section
中村一希; 長谷川靖哉; 川井秀記; 保田直紀; 塚原保徳; 和田雄二, 日本化学会講演予稿集, 86th, 1, 2006

Preparation of EuS nanoparticles by using of photochemical reaction
HASEGAWA Yasuchika; AFZAAL Mohammad; O'BRIEN Paul; WADA Yuji, 希土類 = Rare earths, 46, 0, 16, 17, 18 May 2005
Japanese

Size-controlled Synthesis of EuS Nanocrystals Having Quantum Size Effect
KATAOKA Tomoharu; TSUKAHARA Yasunori; HASEGAWA Yasuchika; WADA Yuji, 希土類 = Rare earths, 46, 0, 12, 13, 18 May 2005
Japanese

Preparation of EuS nanocrystals by using of microwave irradiation
OKADA Yoshiko; NAKAMURA Takashi; KATAOKA Tomoharu; TSUKAHARA Yasunori; HASEGAWA Yasuchika; WADA Yuji, 希土類 = Rare earths, 46, 0, 14, 15, 18 May 2005
Japanese

Magneto-Optical Properties of EuS nanocrystals
TSUKAHARA Yasunori; KATAOKA Tomoharu; HASEGAWA Yasuchika; WADA Yuji, 希土類 = Rare earths, 46, 0, 18, 19, 18 May 2005
Japanese

Correlation Between Photophysical Properties and Amplified Spontaneous Emission of Geometrically Designed Luminescent Eu(III) Complexes
NAKAMURA Kazuki; HASEGAWA Yasuchika; KAWAI Hideki; YASUDA Naoki; WADA Yuji, 希土類 = Rare earths, 46, 0, 102, 103, 18 May 2005
Japanese

Photosensitized Luminescence of Tb(III) via Energy Transfer from Non-coordinating Molecules in Zeolite Cavity
SATO Mutsuko; TSUKAHARA Yasunori; HASEGAWA Yasuchika; WADA Yuji, 希土類 = Rare earths, 46, 0, 104, 105, 18 May 2005
Japanese

Synthesis of Nonanuclear Tb(III) Complex Containing Salicylate Ligands and Its Photosensitized Luminescence
MANSEKI Kazuhiro; HASEGAWA Yasuchika; WADA Yuji, 希土類 = Rare earths, 46, 0, 106, 107, 18 May 2005
Japanese

Radiative Process Control of Lanthanide(III) Complexes and Their Laser Applications
HASEGAWA Yasuchika, Photochemistry, 36, 1, 41, 48, 12 May 2005
光化学協会, Japanese

ナノサイズEuO/EuSを用いた光機能デバイス向けプラスチックの開発 (特集 近未来のプラスチック技術を探る--材料開発から廃プラ対策まで)
長谷川 靖哉, 工業材料, 53, 4, 76, 79, Apr. 2005
日刊工業新聞社, Japanese

Eu(III)錯体の光物性制御が増幅自然放出光に及ぼす影響
中村一希; 長谷川靖哉; 川井秀記; 保田直紀; 和田雄二, 光化学討論会講演要旨集, 2005, 2005

Control of Amplified Spontaneous Emission by Molecular Designs of Europium(III) Complexes
中村一希; 長谷川靖哉; 川井秀記; 保田直紀; 柳田祥三; 和田雄二, 日本化学会講演予稿集, 85th, 1, 2005

Creation of lanthanide(III) complexes and nanocrystals with photo-functional properties
HASEGAWA Yasuchika, Rare earths., 45, 0, 1, 10, 30 Nov. 2004
日本希土類学会, Japanese

第26回光化学若手の会 in 神戸
北村 隆之; 長谷川 靖哉, 光化学 = Photochemistry, 35, 2, 152, 153, 18 Nov. 2004
Japanese

Creation of Photo-functional Rare Earth complexes and Nanocrystals
HASEGAWA Yasuchika, 希土類 = Rare earths, 44, 126, 127, 13 May 2004
Japanese

Preparation of Quantum Size EuS Nanoparticles by Using Liquid Ammonia
KATAOKA Tomoharu; THONGCHANT Supitcha; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 44, 0, 78, 79, 13 May 2004
Japanese

Faraday effect of polymer thin film including EuS nanocrystals
HASEGAWA Yasuchika; THONGCHANT Supitcha; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 44, 0, 80, 81, 13 May 2004
Japanese

Lazing Property of Eu(III) Complex Having Remarkably Narrow Emission Band
NAKAMURA Kazuki; HASEGAWA Yasuchika; KAWAI Hideki; YASUDA Naoki; WADA Yuji; YANAGIDA Sozo, 希土類 = Rare earths, 44, 0, 110, 111, 13 May 2004
Japanese

Thermostabilities and Photophysical Properties of Polynuclear Eu(III) Complexes
MANSEKI Kazuhiro; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 44, 0, 112, 113, 13 May 2004
Japanese

Temperature-Dependence in Photo-Sensitized Luminescence of Terbium Complex
KATAGIRI Shinya; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 44, 0, 114, 115, 13 May 2004
Japanese

The Emission Properties of Erbium(III) Complexes with Phthalocyanine
TSUTSUMI Hiroshi; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 44, 0, 116, 117, 13 May 2004
Japanese

Photosensitized Luminescence of Nd(III) by Antenna Effect Based on Zeolite Structure
SATO Mutsuko; RYO Munenori; WADA Yuji; HASEGAWA Yasuchika; YANAGIDA Shozo, 希土類 = Rare earths, 44, 0, 142, 143, 13 May 2004
Japanese

Control of Near Infrared Emission of Nd(III) Located in Cavity of Nano-sized Faujasite Zeolite
WADA Yuji; RYO Munenori; OKUBO Tatsuya; HASEGAWA Yasuchika; YANAGIDA Shozo, 希土類 = Rare earths, 44, 0, 144, 145, 13 May 2004
Japanese

Enhancement of Amplified Spontaneous Emission (ASE) of the Thin Film Containing Eu(III) Complex having Narrowed Emission band
中村一希; 長谷川靖哉; 川井秀紀; 保田直紀; 長村利彦; 和田雄二; 柳田祥三, 日本化学会講演予稿集, 84th, 1, 2004

Eu(III)錯体を含むポリマー薄膜からの増幅自然放出光(ASE)
川井秀記; 長谷川靖哉; 中村一希; 和田雄二; 柳田祥三; 保田直紀; 長村利彦, 応用物理学関係連合講演会講演予稿集, 51st, 3, 2004

シリコーンラダーポリマーの光学素子への応用
保田直紀; 長谷川靖哉; 中村一希; 和田雄二; 柳田祥三; 川井秀記; 長村利彦, 高分子学会予稿集(CD-ROM), 53, 2 Disk1, 2004

強発光Eu(III)錯体の構造制御によるASE発振特性の向上
中村一希; 長谷川靖哉; 川井秀紀; 保田直紀; 和田雄二; 柳田祥三, 光化学討論会講演要旨集, 2004, 2004

大きな誘導放出断面積を有するEu(III)錯体におけるレーザー発振特性
中村一希; 長谷川靖哉; 川井秀紀; 保田直紀; 長村利彦; 和田雄二, 配位化合物の光化学討論会講演要旨集, 17th, 2004

Detail CD Spectra Analysis in View of Angular Momentum Using Chiral Eu(III) Complexes
HASEGAWA Yasuchika; TOMITA Taiji; WADA Yuji; WADA Takehiko; INOUE Yoshihisa; YANAGIDA Shozo, 希土類 = Rare earths, 42, 0, 132, 133, 20 May 2003
Japanese

Red Emission Narrowing of Eu(III) Complexes with Asymmetric Structure
NAKAMURA Kazuki; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 42, 0, 134, 135, 20 May 2003
Japanese

Emission Property and Application of Intrazeolite Nd(III) Complex
RYO Munenori; WADA Yuji; OKUBO Tastuya; HASEGAWA Yasuchika; YANAGIDA Shozo, 希土類 = Rare earths, 42, 0, 138, 139, 20 May 2003
Japanese

The control of vibrational relaxation in the fluorinated matrix
ANDO Yoshito; TANAKA Yoshito; ARAKI Takayuki; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 42, 0, 140, 141, 20 May 2003
Japanese

Solvent Effect on the Emission Processes of Terbium Complexes
KATAGIRI Shinya; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 42, 0, 142, 143, 20 May 2003
Japanese

Crystal Growth of Luminescent EuO Nanocrystals Using Pulsed Laser
KATAOKA Tomoharu; HASEGAWA Yasuchika; SUPITCHA Thongchant; WADA Yuji; NAKASHIMA Nobuaki; YANAGIDA Shozo, 希土類 = Rare earths, 42, 0, 150, 151, 20 May 2003
Japanese

高い誘導放出断面積を示す強発光性Eu(III)錯体の創製
中村一希; 長谷川靖哉; 和田雄二; 柳田祥三, 光化学討論会講演要旨集, 2003, 2003

Strong Red Luminescence of Europium Complexes with Phosphine Oxide Bidentate Ligands.
中村一希; 長谷川靖哉; 富田泰治; 和田雄二; 柳田祥三, 日本化学会講演予稿集, 83rd, 1, 2003

Luminescent Polymer containing Unsymmetrical Eu(III) Complexes
HASEGAWA Yukichika; YAMAMURO Masaki; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 40, 0, 134, 135, 16 May 2002
Japanese

Sensitized luminescence of rare earth cations encapsulated in nano-sized zeolite cavities
UCHIYAMA Katsuhiro; WADA Yuji; HASEGAWA Yasuchika; YANAGIDA Shozo, 希土類 = Rare earths, 40, 0, 136, 137, 16 May 2002
Japanese

Preparation of EuO Nanocrystals by Liquid Ammonia and Their Magnetic Properties
THONGCHANT Supitcha; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 40, 0, 208, 209, 16 May 2002
Japanese

Photophisical Properties of Eu(hfa-D)_3BINAPO Complex
TOMITA Taiji; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 40, 0, 220, 221, 16 May 2002
Japanese

フォトクロミック分子を用いた応用 : レーザー発振と出力コントロール
長谷川 靖哉, 化学と工業 = Chemistry and chemical industry, 55, 5, 581, 581, 01 May 2002
Japanese

LEDの医療応用の可能性;ロボット手術での赤の演色性の改善の重要性
島田 順一; 天池 寿; 藤 信明; 稲葉 一樹; 谷口 弘毅; 内藤 和世; 川上 養一; 藤田 茂夫; 長谷川 靖哉; 和田 雄二; 柳田 祥三, 日本外科学会雑誌, 103, 0, 644, 644, 10 Mar. 2002
一般社団法人日本外科学会, Japanese

Photophysical Properties of EuO Nanocrystals
HASEGAWA Yasuchika; THONGCHANT Supitcha; WADA Yuji; YANAGIDA Shozo, 希土類 = Rare earths, 0, 38, 164, 165, 02 May 2001
Japanese

Luminescence of neodymium(III) in organic media: Ligand designs for the remarkable luminescence and their evolution
S Yanagida; Y Hasegawa; M Iwamuro; Y Kawamura; Y Wada, JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN, 58, 10, 945, 955, Oct. 2000
Japanese, Book review

Effective Emission of Neodymium Complex Encapsulated within Nano-sized Zeolite
WADA Yuji; OKUBO Tatsuya; RYOU Munenori; NAKAZAWA Toru; HASEGAWA Yasuchika; KITAMURA Takayuki; YANAGIDA Shozo, 希土類 = Rare earths, 0, 36, 192, 193, 16 May 2000
Japanese

Enhanced Luminescence of Sulfonylaminate Nd(III) Complexes in High Frequence Media
HASEGAWA Yasuchika; WADA Yuji; KITAMURA Takayuki; YANAGIDA Shozo, 希土類 = Rare earths, 0, 36, 266, 267, 16 May 2000
Japanese

How to Enhance the Luminescence of Neodymium (III) in Organic Media -Molecular Designs for Lanthanide (III) Luminescent Materials-
HASEGAWA Yasuchika, 化学と工業 = Chemistry and chemical industry, 53, 2, 126, 130, 01 Feb. 2000
日本化学会, Japanese

Electrode behavior of hydrogen reduction in LiCl-KCl melt - Voltammetric analysis
H Ito; Y Hasegawa, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 147, 1, 289, 295, Jan. 2000
English

Enhanced Luminescence of Nd(III) ion due to Twelve Coordination Structure in Deuterated DMSO
HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo; YAMANAKA Tatsuhiko; NAKASHIMA Nobuai, 希土類 = Rare earths, 34, 20, 21, 27 May 1999
Japanese

Enhanced Luminescence of Lanthanide(III) Complexes in Polymer Materials
HASEGAWA Yasuchika; SOGABE Kensaku; TANI Shoji; WADA Yuji; YANAGIDA Shozo; NAKASHIMA Nobuaki; YAMANAKA Tatsuhiko, レーザー学会学術講演会年次大会講演予稿集 = Annual meeting, of the Laser Society of Japan digest of technical papers, 19, 0, 6, 6, 01 Jan. 1999
Japanese

Luminescence Properties of Nd^<3+> and Yb^<3+> Complexes in Organic Solvents for Liquid Laser Medium
KIM Jeong Ho; NAKASHIMA Nobuaki; HASEGAWA Yasuchika; WADA Yuji; YANAGIDA Shozo; YAMANAKA Tatsuhiko, The Review of laser engineering, 26, 9, 691, 695, 15 Sep. 1998
Perdeuterated hexafluoroacetylacetonato-neodymium [Nd (HFA-D) ₃] and -ytterbium [Yb (HFA-D) ₃] complexes were synthesized by the keto-enol tautomerism reaction of Nd (HFA-H) ₃ and Yb (HFA-H) ₃ in methanol-d₄ in order to reduce the radiationless transition to the ligands. The luminescence properties of the Nd (HFA-D) ₃ complex in organic solvents were analyzed by the Judd-Ofeltheory. The luminescence quantum yield of the Yb (HFA-D) ₃ complex increased with the increasing coordination ability of the solvent molecules. The luminescence lifetime of the Yb (HFA-D) ₃ complex in dimethylstilfoxide (DMSO-d₆) which had the highest coordination ability was 66 μs., The Laser Society of Japan, Japanese

Studies on Enhancement of Luminescence of Nd(III) in Liquid Media
YANAGIDA Shozo; HASEGAWA Yasuchika; IWAMURO Mitsunori; WADA Yuji, Photochemistry, 26, 0, 22, 29, 30 Nov. 1997
光化学協会, Japanese

Optical Properties of Nd^<3+>・Yb^<3+> Complexes in Organic Solvent
KIM J. H; NAKASIMA S; YAMANAKA T; HASEGAWA Y; WADA Y; YANAGIDA S, レーザー学会学術講演会年次大会講演予稿集 = Annual meeting, of the Laser Society of Japan digest of technical papers, 17, 0, 89, 89, 01 Jan. 1997
Japanese

Luminescence Properties of Nd^<3+> Complexes in Organic Solvent
KIM J. H; NAKASIMA N; NAKATSUKA M; YAMANAKA T; HASEGAWA Y; MURAKOSHI T; YANAGIDA S, レーザー学会学術講演会年次大会講演予稿集 = Annual meeting, of the Laser Society of Japan digest of technical papers, 16, 0, 31, 31, 01 Jan. 1996
Japanese

高輝度かつ高耐久性を有する発光性有機－無機ハイブリッド材料─希土類錯体の高分子化─
長谷川靖哉, 57, 86-89
セラミックス, 2022, [Contributor]

発光色変化を示す希土類分子材料の開発
長谷川靖哉, 101-106
日本化学会編 化学同人, 2021, [Contributor]

希土類元素ブロック高分子を用いた表示材料への展開
長谷川靖哉, 58, 138-146
日本画像学会誌, 2019, [Single work]

発光性希土類錯体を用いた農林水産業の支援
長谷川靖哉
グリーンテクノ情報, 2018, [Single work]

PSP/TSP のための新材料開発
小幡誠; 三ツ石方也; 長谷川靖哉, Vol.38 No.148, 10-16
可視化情報, 2018, [Joint work]

希土類配位高分子の励起エネルギー移動
Yasuchika Hasegawa, ディビジョントピックス p.497
化学と工業, 2017, [Single work]

新時代を切り開く希土類錯体ポリマー
長谷川靖哉, 90, 174-181
科学と工業, 2016, [Single work]

ナノ材料解析の実際
長谷川靖哉, 第２６章 磁気光学効果
講談社, 2016, [Joint work]

元素ブロック材料の創出と応用展開
長谷川靖哉, 新型発光体創成を目指した希土類元素ブロックの三次元空間配列
シーエムシー出版, 2016, [Joint work]

発光の辞典 基礎からイメージングまで
長谷川靖哉, 5.5.4 希土類物質の発光
朝倉書店, 2015, [Joint work]

希土類物質のナノ構造制御と光機能
長谷川靖哉
化学工業, 2015, 477

光を操る希土類高分子ブロック
中西貴之; 長谷川靖哉
高分子, 2015, 64, 203

カメレオン発光体の開発
長谷川靖哉
パリティ (丸善), 2015, vol. 30, 25

希土類錯体を用いたルミネッセンス材料科学
長谷川靖哉
化学工業 (化学工業社), 2014, vol.65, No.5, 348

温度変化を感知するカメレオン発光体
長谷川靖哉
パリティ (丸善), 2014, vol.29, No.2, 44

温度センシングを可能にするカメレオン発光体
長谷川靖哉
工業材料 (日刊工業新聞社), 2014, vol 62, No.1, 24-25

光化学の辞典
光化学協会; 光化学の辞典編集委員会
朝倉書店, 2014, 24-25

錯体化学
長谷川靖哉; 伊藤肇
講談社, 2014

授業：学生満足度ナンバー１の秘訣とは？
長谷川靖哉
化学 (化学同人), 2013, vol.68, No.4, 17-19

金属ナノ・マイクロ粒子の最新技術と応用
米澤徹監修, ３−４光磁気材料
シーエムシー出版, 2013, 209-217

希土類が拓く次世代光機能材料の創成
長谷川靖哉
希土類, 2012, 61, 11-22

世界を底から変える力 「化学」を自由に使いこなす方法
長谷川靖哉
化学工業日報, 2012

属および半導体ナノ粒子の科学
日本化学会編, １５章ランタニド系半導体の光物性
化学同人, 2012

磁性半導体EuXナノ結晶の合成と光磁気機能
長谷川靖哉; 河合壯
日本結晶成長学会誌, 2010, 37, 273

次世代の光情報通信用を指向した新型希土類ナノ結晶の開発
長谷川靖哉
化学工業, 2010, 61, 744-751

希土類ナノ結晶を用いた次世代光情報通信用の機能材料
長谷川靖哉
未来材料, 2010, 10, 12, 61

強発光を示すEu錯体の分子設計
長谷川靖哉
マテリアルインテグレーション(ティーアイシー), 2010, 23, 20

光ナノ科学への招待
長谷川靖哉; 細川陽一郎; 中嶋琢也
化学同人, 2010, 4759803882

配位化合物の電子状態と光物理
山内; 野崎編, ２章
三共出版, 2010

希土類錯体を用いた蛍光体
長谷川靖哉
光アライアンス(日本工業出版), 2009, 20, 17-20

京都・花灯路を希土類錯体で照らす
長谷川靖哉
Electronics Communications, 2009, 25, 2

光機能を有する希土類錯体
長谷川靖哉; 中川哲也
化学工業, 2009, 60, 590

希土類錯体を用いた発光材料および顔料
長谷川靖哉
顔料, 2008, 52, 2, 2

新しい機能材料創成を目指したフォトクロミック希土類錯体の開発
長谷川靖哉; 中川哲也; 河合壯
化学工業, 2008, 59, 879

光磁気特性を有する希土類ナノ結晶
長谷川靖哉
光化学, 2008, 39, 11

希土類錯体が拓いた光の色彩画
長谷川靖哉
現代化学, 2008, 4, 25

蛍光材料の基礎と新展開−固体照明・ディスプレイ材料−
金光義彦; 岡本伸治編, ３章 局在発光中心：希土類・遷移金属
オーム社, 2008, 79-130

希土類の材料技術ハンドブック: 第２章１４節 非対称配位子錯体の蛍光体 合成法, 構造, 評価法
足立吟也編, 第２章１４節 非対称配位子錯体の蛍光体 合成法, 構造, 評価法
エヌティーエス, 2008, 120-127

紫外線で発光する透明インク
長谷川靖哉
化学, 2007, vol. 62, No. 11, p.73

光機能性高分子材料の新たな潮流：第I編
市村國宏編, 第３章 希土類を基盤とした光情報機能物質
シーエムシー出版, 2007, 37-58

錯体化学会選書２ 金属錯体の光化学
佐々木陽一; 石谷治編著, ９章 希土類の金属錯体の発光
三共出版, 2007

強発光を示す希土類錯体の設計戦略
長谷川靖哉
Bull. Jpn. Soc. Coord. Chem., 2006, 48, 2

光る分子の底力 ―発光体デザインの魅力―
長谷川靖哉; 柳田祥三
化学同人, 2006, 4873266165

希土類の機能と応用
足立吟也編, 2.8章 希土類錯体を用いた発光材料
シーエムシー出版, 2006, 138-144

希土類錯体の発光過程制御とレーザー発振に関する研究
長谷川靖哉
光化学, 2005, 36, 41

ナノサイズEuO/EuSを用いた光機能デバイス向けプラスティックの開発
長谷川靖哉
工業材料, 2005, 53, 76

光機能を有する希土類錯体および希土類ナノ結晶の創成
長谷川靖哉
希土類, 2004, 45, 1

海外レポート・マンチェスター大学留学記
長谷川靖哉
Electronics Communications, 2004, 20, 32

光子ブロックって何？
高原淳一; 川畑弘; 長谷川靖哉; 長山智男; 小西毅; 細川陽一郎; 兼松泰男; 小林哲郎
OPTRONICS, 2003, 2, 150

錯体化学−基礎と最新の話題−
基礎錯体工学研究会編, 6.4.2章 有機強発光体としての希土類錯体
講談社, 2003

フォトクロミック分子の応用：レーザー発振と出力コントロール
長谷川靖哉
化学と工業, 2002, 55, 581

光らないネオジムをどのように光らせるか
長谷川靖哉
化学と工業, 2000, 53, 126

フッ素化合物を用いた光機能の創製
柳田祥三; 北村隆之; 和田雄二; 長谷川靖哉
科学と工業, 1998, 72, 333

Nd(III)の溶液中における発光：液体ネオジムレーザーの開発を目指して
柳田祥三; 長谷川靖哉; 岩室光則; 和田雄二
光化学, 1997, 26, 22

総合化学特別研究, 2024年, 修士課程, 総合化学院

化学計測学特論, 2024年, 修士課程, 総合化学院

総合化学実験指導法, 2024年, 修士課程, 総合化学院

大学院共通授業科目（一般科目）：自然科学・応用科学, 2024年, 修士課程, 大学院共通科目

総合化学実験研究法, 2024年, 修士課程, 総合化学院

先端総合化学特論Ⅱ, 2024年, 博士後期課程, 総合化学院

総合化学特別研究第一, 2024年, 博士後期課程, 総合化学院

環境と人間, 2024年, 学士課程, 全学教育

総合化学研究・指導法, 2024年, 博士後期課程, 総合化学院

電子材料化学, 2024年, 学士課程, 工学部

工学特別講義, 2024年, 学士課程, 工学部

量子化学Ⅰ, 2024年, 学士課程, 工学部

錯体化学, 2024年, 学士課程, 工学部

Photo-information analysis of stable and transformative lanthanide complex in cancer cells
Grants-in-Aid for Scientific Research
30 Jun. 2023 - 31 Mar. 2026
長谷川 靖哉
ポリエーテル鎖を有するユウロピウム錯体を合成し、そのユウロピウム錯体をがん細胞内へ導入する実験を行なった。本細胞実験に先立ち、ポリエーテル鎖を有するユウロピウム錯体の生理培養液中での安定性を評価した。ポリエーテル鎖を有するユウロピウム錯体は生理培養液中で巨大な分子会合体を形成することが蛍光顕微鏡観察および光散乱測定（DLS測定）により明らかになった。この巨大な分子会合体が生理培養液中のアミノ酸によるユウロピウム錯体の分解を抑制していると考えられる。この巨大な分子会合体はがん細胞表面に吸着し、ユウロピウム錯体が細胞内に侵入して赤色発光することが蛍光顕微鏡観察によって明らかになった。
この赤色発光するがん細胞の発光スペクトルと発光寿命を計測して発光速度定数の算出を行なった。この発光速度定数はがん細胞内によりこまれると急激に増大し、その発光速度定数の変化時間はがん細胞の活性度（悪性度）によって大きく異なることが明らかとなった。様々な種類のがん細胞取り込み実験を行い、悪性度の高いがん細胞ほどユウロピウム錯体が取り込まれやすいことがわかった。特に悪性度の異なる脳細胞(NHA: normal human astrocytes)を用いて実験を行なったところ、悪性度の高いがん細胞ほど発光速度定数の変化速度が早いことがわかった。具体的には、Eu(III)錯体を投入直後と 3 時間後の測定において発光速度定数は NHA/TS (良性グレード II 神経膠腫) で 4%、NHA/TSR (悪性グレード III 神経膠腫) で 7%、NHA/TSRA (悪性、グレード IV 神経膠腫)で 27% の増加を示した。以上、がん細胞の悪性度を光物理化学解析によって初めて評価することに成功した。
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 23K17925

Photo-functional materials composed of lanthanide coordination nanoparticles
Grants-in-Aid for Scientific Research
01 Apr. 2022 - 31 Mar. 2026
長谷川 靖哉; 庄司 淳; 北川 裕一
Eu(III)配位高分子[Eu(hfa)3(m-dpb)]n(hfa:ヘキサフルオロアセチルアセトナート、m-dpb:1,3-ビス-(ジフェニルホスホリル)ベンゼン)の粒径制御合成に成功した。 このEu(III)配位高分子はカチオン性CTAB(臭化セチルトリメチルアンモニウム)およびアニオン性SDS(ドデシル硫酸ナトリウム)界面活性剤を使用し、水性ミセル溶液中で[Eu(hfa)3(H2O)2]およびリンカーm-dpbリガンドの錯体化によりEu(III)配位粒子を合成した。
[Eu(hfa)3(m-dpb)]n の粒子サイズと形態を走査型電子顕微鏡 (SEM) 測定を使用して観察した。Eu(III)配位高分子のサイズはCTAB濃度の増加により徐々に減少した。 また、形成される結晶構造はミセル系はバルク配位高分子とは異なることが明らかとなった。合成されたEu(III)配位粒子とEuバルク配位高分子はUV照射下で４fー４f遷移に基づく赤色発光を示した。その4f－4fの発光量子収率、放射速度定数（kr）、非放射速度定数（knr）は発光寿命と発光スペクトルを用いて見積もった。Eu(III)配位粒子のkr値はEuバルク配位高分子のkr値とほぼ同じであった。 一方、Eu(III)配位粒子のknr値はEuバルクのknr値よりもはるかに小さく、大きな発光量子収率を与えることがわかった（Eu(III)配位粒子の発光量子収率＝91%)。 これらの結果は、ミセル系で形成されたEu(III)配位粒子の結晶構造の knr 値が、Eu(III)配位粒子で観察される他の結晶構造の knr 値よりも小さいことを示している。 発光寿命の急激な変化は、結晶形状の異方性などの結晶構造に起因すると考えられる。この研究では、Eu(III)配位粒子のサイズ制御と発光特性の密接な関係を初めて実証した。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 23K23420

Structural control and photo-functionalization of lanthanide coordination nanoparticles in micelle reactors
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Apr. 2022 - Mar. 2026
長谷川 靖哉
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Principal investigator, 22H02152

Luminescent lanthanide coordination aggregates with biomolecules in water media
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Apr. 2022 - Mar. 2024
長谷川 靖哉
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Hokkaido University, Principal investigator, 22H04516

情報科学を基盤としたキラル型希土類錯体の機械学習および探索
Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
Jul. 2020 - Mar. 2023
長谷川 靖哉
本研究では情報科学と機械学習を基盤としたキラルEu(III)錯体の配位空間研究を検討した。具体的には、機械学習を行うために必要な基礎データとして、数種類のキラルEu(III)錯体[Eu(+hfc)4]-M+ (M = Na, K, Rb, Cs, NEt4+,NEt3Me+, hfc: へプラフルオロブチリルカンファー)の合成および光物性評価を行った。
[Eu(+hfc)4]- Cs+の三分子に関しては四つの+hfc配位子のフルオロアルキル基が全て対カチオンを取り囲む向きに配置しており、複数のCH-F相互作用およびCs-F間の結合があることが分かった。一方で、[La(+hfc)4]- Na+は三つの+hfc配位子がNaイオンを取り囲む向きに配位しているのに対して、残り一つのhfc配位子はフルオロアルキル基がLa-Naの結合に対して垂直な方向に延びていた。このことより、[La(+hfc)4]- Na+は他の三つの錯体と比較して配位幾何学構造が大きく異なることが分かった。
[Eu(+hfc)4]- Cs+のgCPLは本測定と既報でほぼ等しい値が得られた。 [Eu(+hfc)4]-NEt4+および[Eu(+hfc)4]- NEt3Me+では1.4を超える大きいgCPLが観測され、対カチオンの構造を最適化することでさらなるgCPL増大の可能性が示唆された。一方、MeOH溶液中での[Eu(+hfc)4]- NEt4+のgCPLは－0.08であった。Square antiprism構造を取らない[Eu(+hfc)4]- Na+もgCPLが+0.15と低いことから、Eu(+hfc)4錯体ではSquare antiprism構造によって+hfc配位子のフルオロアルキル基がEu(III)イオンに対し一方向に局在する配位環境がCPL強度を増大させると考えられる。
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 20K21201

Elucidation of crystal plane-selective photoasymmetric hydrogenation reaction on shape-controlled titanium oxide nanocrystals
Grants-in-Aid for Scientific Research
01 Apr. 2019 - 31 Mar. 2022
Shigeru Kohtani
In this study, we investigated the enantioselective asymmetric induction mechanism by chiral organic compounds co-adsorbed to TiO2 in the photoasymmetric hydrogenation reaction from an aromatic ketone such as 2-acetonaphtone (2-NP) to a chiral secondary alcohol (2-NPOH) having an asymmetric carbon.
Achievement (1): The newly discovered chiral co-adsorbent 2-amino-1-phenyethanol (PhEA) was found to be stably acted in the 2-NP hydrogenation reaction, and showed high yield and relatively strong enantioselectivity. Achievement (2): It was clarified that the enantioselectivity of this reaction does not depend only on the proportion of the crystal surface, but is also strongly influenced stereochemically by adsorption of fluoride ions.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hyogo University of Health Sciences, 19K05681

水圏環境における発光性希土類分子会合体の形成と光機能
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Apr. 2020 - Mar. 2022
長谷川 靖哉
水圏環境における生体環境計測のための検出分子として、水溶性の発光性希土類錯体が現在注目されている。この希土類錯体は極めて長い発光寿命（数百マイクロ秒）を示すことから、時間分解蛍光解析による水溶液中および生体系の状態観察が可能になる。本研究課題では、発光性の希土類錯体にポリエーテル鎖を導入し、水圏環境における分子集合体の形成と新しい生体環境モニター開発を目指した。具体的には、昨年合成されたポリエーテル鎖導入ユウロピウム錯体（水溶性ユウロピウム錯体）の水溶液中における会合体形成と光物性（発光量子効率、発光寿命、光増感エネルギー移動効率）との関係を明らかにし、得られた水溶性ユウロピウム錯体を癌細胞の生体観察へと展開した。具体的には、生理培養液（DMEM+FBS: アミノ酸、グルコース、牛血清などを含む水溶液）での水溶性ユウロピウム錯体の発光挙動を計測し、この生理培養液の中にがん細胞を導入することによる水溶性ユウロピウム錯体の発光挙動変化を計測した。
水溶性のポリエーテルを導入したユウロピウム錯体Eu-ntfa-TEGPOを合成した。Eu-ntfa-TEGPOは水圏環境で巨大な分子集合体を形成し、発光量子効率が増大することがわかった。この発光機能増大は、分子集合体形成による振動失活への抑制が行われたためと考えられる。さらに、水溶性のユウロピウム錯体をがん細胞へ導入する試験（生体環境への導入）も行ったところ、がん細胞へユウロピウム錯体が取り込まれる様子が観察された。
水溶性ポリエーテルを導入した新しいユウロピウム錯体を導入し、水圏環境で分子集合体を形成することによる強発光化に成功した。さらに アミド結合によって分子集積する希土類配位高分子や希土類錯体のナノ集積体合成にも成功した。分子集合体は希土類錯体の光機能化に重要であることが明らかになった。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Hokkaido University, 20H05197

希土類錯体から配位高分子へのソフトクリスタル変形と光機能評価
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Apr. 2020 - Mar. 2022
長谷川 靖哉
本研究では、外部刺激によって希土類の配位数と幾何学構造が変化する新しいソフトクリスタル変形の創成および光機能評価を検討した。七配位Tb(III) 錯体から八配位のTb(III)配位高分子へのソフトクリスタル転移の結晶連結の詳細を検討した。また、加熱による結晶相転移が起こるキラル型Eu(III)配位高分子の円偏光機能解析についても検討を行った。
七配位から八配位へのソフトクリスタル変形の結晶連結では、七配位型の二核Tb(III)錯体（図１）から八配位のTb(III) 配位高分子への変形は２つの異なる結晶を連結することができる。この結晶連結に関して、接合結晶面の方位依存性があることが明らかになった。さらに、レーザー光によってDy(III) 結晶からTb(III)結晶へ光エネルギーが確実に伝達していることを明らかにした。
キラルEu(III) 配位高分子の相転移計算では、相転移が可能なキラル型Eu(III)配位高分子の円偏光発光特性は配位高分子の配列構造に大きく依存していることを明らかにした。今回はその配列構造を段階的に変化させたモデルを設定し、それらのモデルの遷移双極子モーメント（ED）を計算した。この計算の結果、Eu(III)配位高分子のL M C TにおけるEDの大きさは配列距離に大きく依存することがわかった。 このED変化が円偏光発光特性に強く影響を与えていると推測される。
以上、希土類配位高分子の配位構造および結晶の構造転移に基づく光機能の発現および機能解明に成功した。これらの研究成果は本領域の研究推進に大きく貢献したと言える。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Hokkaido University, 20H04653

ソフトクリスタル挙動を示すキラル希土類配位高分子の合成と光機能評価
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Apr. 2018 - Mar. 2020
長谷川 靖哉
キラル配位子を導入した希土類錯体は異方性の高い円偏光発光を示す。この集合状態におけるキラル希土類錯体の光機能解明は学術的に重要である。本研究では、結晶相転移（ソフトクリスタル挙動）を誘起するキラル希土類配位高分子の合成および光機能評価を行う。具体的には、相転移挙動を誘起するエチニル含有ホスフィンオキシドとキラル型Eu(III)錯体との反応によりキラル希土類配位高分子の合成を行う。そのキラル希土類配位高分子の様々な固体状態（結晶系α、結晶系β、ガラス状態など）における基礎光物性とキラル光機能（CDおよびCPL特性）の評価を行い、相転移挙動におけるキラル機能を明らかにする。さらに、Eu(III)とTb(III)の混合系配位高分子を合成し、温度変化による光誘起エネルギー移動過程をアレニウス解析によって評価する。
初年度では、本研究に先立ち、キラル配位子を導入したユウロピウム配位高分子の合成に成功した。この配位高分子は螺旋構造を形成していることがX線構造解析により明らかになった。その螺旋構造の形成により希土類配位高分子の発光特性と円偏光特性が大きく向上することを明らかにした。また、テルビウム配位高分子の光誘起エネルギー移動過程が錯体をつなぐリンカー配位子の分子構造によって大きく影響を受けることも本研究により明らかになった。さらに、エチニル基を導入したキラル型ユウロピウム配位高分子の合成にも初めて成功した。
以上のことから、本研究は研究の目的および実施計画どおりに研究が進行し、優れた研究成果をいくつもあげることに成功した。さらに、本研究を進めるにあたり、領域内のエキスパート研究者との共同研究も大きく進展し、本領域の活性化に大きく貢献できた。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Hokkaido University, Principal investigator, 18H04497

積層構造を有する発光性希土類配位ナノ粒子の合成と光機能
科学研究費補助金(基盤研究(B) )
Apr. 2018 - Mar. 2020
長谷川靖哉
文部科学省, Principal investigator, Competitive research funding

New Polymeric Materials Based on Element-Blocks
Grants-in-Aid for Scientific Research
28 Jun. 2012 - 31 Mar. 2017
Chujo Yoshiki
A structural unit consisting of various groups of heteroatoms is defined an "element-block." By employing new element-blocks and achieving hierarchical interface control in order to yield the desired functions, the creation of new materials that share, at a high level, various properties not achievable with conventional organic polymeric materials as well as forming properties of molding processability and flexible designability that inorganic materials lack can be expected. Based on this idea, we have developed various kinds of element-blocks. Furthermore, highly-functional materials can be constructed by combination of element-blocks. From these results, we can say that new diagnoses for material designs were able to be established by our research group based on element-blocks.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Kyoto University, 24102001

希土類半導体へのナノ磁気格子導入による光磁気特性増大
科学研究費補助金(基盤研究(B)
Apr. 2014 - Mar. 2017
長谷川靖哉
文部科学省, Principal investigator, Competitive research funding

Development of Photo- and Magneto-functional Polymer Materials containing Lanthanide Element-blocks
Grants-in-Aid for Scientific Research
Oct. 2012 - Mar. 2017
Hasegawa Yasuchika
Three-dimensional ordering and assemble of metal element-blocks provide creation of novel functional materials over the fields of inorganic and polymer materials. We studied on the three-domensional ordering of lanthanide element-blocks with characteristic photo-magnetic properties.
In this study, enhancements of thermo-stability and emission quantum efficiencies of three-dimensional lanthanide coordination polymers have been successfully prepared. We also successfully reported enhanced opto-magnetic properties of three-dimensional lanthanide nano crystals.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Hokkaido University, Principal investigator, Competitive research funding, 24102012

Remarkable magneto-optical properties of Tb(III) clusters
Grants-in-Aid for Scientific Research
Apr. 2012 - Mar. 2015
HASEGAWA Yasuchika
The effective magneto－optical properties of novel nonanuclear Tb(III) clusters with paramagnetic Tb(III) ions were studied. The geometrical structures of these nonanuclear Tb(III) clusters were characterized using X-ray single-crystal analysis and shape-measure calculation. Optical Faraday rotation was observed in PMMA thin films containing nonanuclear Tb(III) clusters in the visible region. The Verdet constant per Tb(III) ion of the Tb clusters is 150 times larger than that of general Tb(III) oxide glass. To understand their large Faraday rotation,electron paramagnetic resonance measurements were carried out. In this study, the magneto－optical relation to the coordination geometry of Tb ions was demonstrated for the first time.
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, Principal investigator, Competitive research funding, 24655109

磁性半導体ナノ結晶の磁気光学効果増強のための内部・表面磁気構造制御
科学研究費補助金(基盤研究(B))
Apr. 2011 - Mar. 2013
長谷川 靖哉
文部科学省, 基盤研究(B), 北海道大学, Principal investigator, Competitive research funding, 23350057

希土類ナノ結晶と金粒子の超格子形成と機能創発
科学研究費補助金(新学術領域研究(研究領域提案型))
2011 - 2012
長谷川 靖哉
金ナノ粒子は光エネルギーを吸収することにより、表面プラズモン電場増強が発生する。この電場増強が配列したEuXのスピン偏極に影響を与え、特異的な光磁気物性が期待できる。本研究「希土類ナノ結晶と金粒子の超格子形成と機能創発」を行うために、23年度はEuSナノ結晶とAuナノ粒子の複合体形成(EuS-金ナノ複合体)を行い、電場増強下における光磁気機能評価を行った。
具体的には、Au錯体を新規に合成し、オレイルアミン中で300℃にて反応をおこなうことににより、Auナノ粒子を合成した。同時にユーロピウム錯体を原料としたEuSナノ結晶を合成し、EuSナノ結晶とAuナノ粒子をヘキサンジチオールで連結した(EuS-金ナノ複合体)。その複合形状は透過型電子顕微鏡により観察した。
得られたEuS-金ナノ複合体は、金ナノ粒子のプラズモンバンドに起因する吸収帯のレッドシフトが観測された。このレッドシフトは誘電率が高いEuSが金ナノ結晶の近傍に存在することを意味している。
このEuS-金ナノ複合体をポリメタクリル酸メチルのTHF溶液に分散し、キャスト法にてEuS-金ナノ複合体を含むポリメタクリル酸メチル薄膜を調整した。得られたEuS-金ナノ複合体含有ポリマー薄膜に印可磁場150000eにおけるファラデー回転(磁場印加中の物質に偏光をあてると、その偏光面が回転する現象:ファラデー回転)がプラズモン吸収バンド領域において増大することが明らかとなった。
本研究により、EuSナノ結晶の光磁気特性(ファラデー効果)におけるプラズモン電場増強効果が初めて明らかになった。
文部科学省, 新学術領域研究(研究領域提案型), 北海道大学, Principal investigator, Competitive research funding, 23111701

Self-Organized Structures of Semiconductor Nanocrystals and Their Photomagnetic Properties
Grants-in-Aid for Scientific Research
2010 - 2012
KAWAI Tsuyoshi; NAKASHIMA Takuya; YUASA Junpei; HASEGAWA Yasuchika
Self-Assembling organizationof semiconductor nanocrystals based on Pb(II), Eu(III) and Cd(II) chalcogenideswere studied and their fine tunings was investigated. EuS-PbS hybrid semiconductors were prepared for the first time and their enhanced opto-magnetic properties were demonstrated.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Nara Institute of Science and Technology, 22350062

Development of scanning electrochemical nano-scope and analyses of initiation mechanism and kinetics of localized interfacial reaction
Grants-in-Aid for Scientific Research
2009 - 2011
FUSHIMI Koji; KONNO Hidetaka; HASEGAWA Yasuchika
New micro-electrochemical techniques developed were applied to investigate the mechanism and kinetics of heterogeneous reaction of the interface between practical materials and environment. Though a probe nano-electrode was successfully developed by using LIGA, the development of a scanning electrochemical nano-scope could not be completed because of the difficulty of probe alignment. However, the application of a coaxial double microelectrode to SECM probe was successfully attained the improvement of sensitivity and lateral resolution of SECM image. Application of this SECM and amicro-electrochemical cell technique to in situ observation of polycrystalline iron surface corroding in acidic sulphate media revealed that iron corroded heterogeneously depending on crystallographic orientation which affected the hydrogen evolution reactivity. The stability of passive state on iron was also strongly dependent on the substrate orientation.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 21360350

プラズモン増強電場による希土類ナノ結晶の光磁気効果の影響に関する研究
科学研究費補助金(特定領域研究)
2009 - 2010
長谷川 靖哉; 河合 壯; 中嶋 琢也; 湯浅 順平
これまで、ファラデー効果に理想的な物質として希土類ナノ結晶EuX(ユーロピウムカルコゲナイド:X=O,S,Se)の合成およびファラデー効果に関する研究を世界に先駆けて行ってきた。希土類ナノ結晶EuXのファラデー効果(光磁気効果)における表面プラズモンの電場増強効果を検討し、大きなファラデー効果増大および学術的機構解明を目的として、AuとEuSが結合した複合系ナノ粒子の合成を行った。複合型ナノ粒子の合成は、平均粒子サイズ15nmの立方体型EuS結晶と平均粒子サイズ10nmの球状型Au粒子をトルエン中に入れ、ヘキサンジチオールを添加して撹拌することで得た。得られた複合ナノ粒子は透過型電子顕微鏡にて状態観察を行った。さらに、吸収スペクトル測定により、複合型ナノ粒子におけるAuのプラズモン吸収バンドが長波長側へのおおきくシフトしていることが明らかとなった。これは、金ナノ粒子近傍に存在するEuSナノ粒子の影響と考えられる。得られたEuS-Au複合ナノ粒子をポリマー(ポリメタクリル酸メチル)が溶解した有機溶媒中に分散し、キャスト法にて「EuS-Au複合ナノ粒子含有ポリマー薄膜」を作製した。得られたポリマー薄膜に1.5Tの磁場を印可し、偏光の回転角度変化(ファラデー効果)に関する測定を行った。この測定の結果、プラズモン吸収バンド領域の波長において、おおきく偏光回転角が変化することが分かった...
文部科学省, 特定領域研究, 奈良先端科学技術大学院大学->北海道大学, Principal investigator, Competitive research funding, 21020023

希土類ナノ物質/有機ハイブリッド化による巨大組織体形成と機能創発
科学研究費補助金(新学術領域研究(研究領域提案型))
2009 - 2010
長谷川 靖哉
これまで、ファラデー効果に理想的な物質として希土類ナノ結晶EuX(ユーロピウムカルコゲナイド:X=0,S,Se)の合成およびファラデー効果に関する研究を世界に先駆けて行ってきた。このEuXナノ結晶から構成される巨大な自己組織体はEuXナノ結晶間の磁気的相互作用を増大させると考えられ、新しい機能材料への展開が期待される。本年度は溶液中におけるEuSナノ結晶から構成される巨大組織体の構造制御および機能発現に関する検討を行った。平均粒子サイズ15nmのEuSナノ結晶をアルコール中に分散し、その溶液中における自己会合体形成を光散乱測定(DLS測定)により観察した。観察の結果、アルコール分子の分子サイズが小さいもにほど、大きなEuSナノ結晶会合体を形成することがわかった。さらに、その会合体の大きさは使用するアルコール分子の種類によって制御できることも明らかにした。この溶液中における自己会合体の構造については小角X線散乱測定により同定をした。EuSナノ結晶会合体を含むアルコール溶液に磁場を印可し、偏光回転角測定を行った。測定の結果、偏光回転が見られる波長領域はEuSナノ結晶分散溶液にくらべて大きく超波長シフトしていることがあきらかとなった。これは、EuSナノ結晶会合体においてEuS結晶同士のエキシトン・カップリングが発生したためと現在考えている。本研究により、EuSナノ結晶会合体を形成す...
文部科学省, 新学術領域研究(研究領域提案型), 奈良先端科学技術大学院大学->北海道大学, Principal investigator, Competitive research funding, 21111516

発光性イオン液体複合材料の開発とセンサーへの応用
科学研究費補助金(特定領域研究)
2008 - 2009
中嶋 琢也; 長谷川 靖哉; 湯浅 順平; 河合 壯
通常、高分子電解質の交互積層(Layer-by-Layer)法による薄膜の作成には水媒体が用いられるが、水分の存在は薄膜の応用を大幅に制限している。特に、水素貯蔵材料などの禁水系材料や電子デバイスのコーティングには無水条件が望まれ、非水系へのLayer-by-Layer法の展開が必要とされる。我々は、イオン液体がそのイオン組成により種々の物質、特に、ポリマーに対する溶解性を制御できることから交互積層膜作製の媒体として利用できると考えた。さらに、いくつかのイオン液体はセルロースやシルクならびにカーボンナノチューブなど難溶性の物質を容易に溶解できることから、分子性溶媒では達成できない薄膜が作製できると期待される。また、ナノメートルスケールで垂直方向に設計が可能な交互積層薄膜作製法の開発により、イオン液体含有高性能センサー作製のための基礎技術が確立できる。以上より、本研究では、典型的な高分子電解質、カーボンナノチューブならびにセルロースを材料とした交互積層薄膜の作製を行った。いずれの材料においても、規則的な膜厚成長が確認され、特にセルロースにおいては高透明、高強度の薄膜を与えた。
文部科学省, 特定領域研究, 奈良先端科学技術大学院大学, Coinvestigator not use grants, Competitive research funding, 20031018

Self-assembly and photonic application of lanthanide nano-cubes controlled their size and shape
Grants-in-Aid for Scientific Research(基盤研究(C))
2007 - 2009
Yasuchika HASEGAWA; 杉浦 忠男
Europium sulfide (EuS) nanocrystals have great potential in such applications as novel photo-isolators for optical fibers and photo-magnetic devices. The cube-shaped EuS nanocrystals are prepared by the thermal reduction of single source precursor, tetra (diethyldithiocarbamate) europium complex with oleylamine as a surface modified regent. In the present study, three-dimensional Superlattice structures (SLSs) assembled with cube-shapedEuS nanocrystals (NCs) and their remarkable magnetic properties have been successfully observed.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 奈良先端科学技術大学院大学, Principal investigator, Competitive research funding, 19510104

Research of magneto-optical properties of lanthanide nanocrystals
Grants-in-Aid for Scientific Research
2008 - 2008
HASEGAWA Yasuchika; KAWAI Tsuyoshi; NAKASHIMA Takuya; YUASA Jyunpei
EuXナノ結晶は希土類元素から構成される磁性半導体である。磁場印加下では、この物質を通過する直線偏光は回転(ファラデー効果)することから、次世代の光情報通信用アイソレーター素子として、現在注目されている。このEuXナノ結晶を光機能材料へ展開するために、まずEuSおよびEuSeナノ結晶を含むポリマー薄膜を作製した。具体的には、EuSおよびEuSeナノ結晶をPMMA含有エチルメチルケトンに溶解し、ガラス基板状にスピンコートすることにより薄膜を調製した。得られた薄膜に1.5Tの磁場(B)を印加し、薄膜中を透過する直線偏光の回転角を測定したところ、この回転角はEuSナノ結晶の形状に依存することが明らかとなり、キューブ状のEuSおよびEuSeナノ結晶は大きな回転角(ファラデー効果)を示すことがわかった。この大きなファラデー効果の原因を明らかにするために、EuSおよびEuSeナノ結晶の磁気測定を行った。キューブ形状を有するEuSおよびEuSeナノ結晶は保持力を有することがこの測定から明らかとなり、この保持力が大きなファラデー効果発現の原因となっていることがわかった。
Japan Society for the Promotion of Science, Nara Institute of Science and Technology, Principal investigator, Competitive research funding, 20900127

イミダゾリウム基を含むフォトクロミック分子材料の開発
科学研究費補助金(特定領域研究)
2008 - 2008
中嶋 琢也; 長谷川 靖哉; 湯浅 順平; 河合 壯
電荷の局在状態の光制御を実現するシステムを目指し、ジアリールエテン、ターアリーレン(ジアリールアリーレン)へのイミダゾリウム環の導入を行った。光化学反応に伴い、導入されたイミダゾリウム環は正電荷が非局在化したイミダゾリウム型と局在化したイミダゾリニウム型に相互変換する。本年度は、この正電荷の局在構造変化によるソルバト、イオノクロミズムや反応性の発現など興味深い特徴を見出した。(1)イミダゾリウム置換ジアリールエテンはトルエンからピリジンまで幅広い極性の溶媒中においてフォトクロミック反応を示すことを見出した。閉環体における局在正電荷はルイス塩基結合サイトとして働き、高ドナー数を有する分子やアニオンと特異的に相互作用する。その結果、π共役構造を変化させ、マルチクロミック特性(光、溶媒、イオン応答)を示すことを見出した。(2)ジチアゾリルイミダゾリウムは種々の溶媒中で可逆的にフォトクロミック反応を示し、(1)と同様に、ソルバトクロミズムを示した。この場合、溶媒のドナー数ではなく誘電率に応答した吸収ピークシフトを示した。低極性溶媒中において局在カチオンはヨードアニオンと強く相互作用し、イミダゾリニウムのN(1)-C(2)-N(3)の二重結合性を低下させ、π共役系の縮小により低波長シフトを与えた。さらに、局在カチオンの高い反応性は、強い求核剤であるメトキシドとの求核付加反応によりpho...
文部科学省, 特定領域研究, 奈良先端科学技術大学院大学, Coinvestigator not use grants, Competitive research funding, 20044019

Study for photoresponsible π-conjugated molecular wire based on photochromic switching units
Grants-in-Aid for Scientific Research(特定領域研究)
2005 - 2008
Tsuyoshi KAWAI; Takuya NAKASHIMA; 田中 仙君; 松井 龍之介; Yasuchika HASEGAWA; Junpei YUASA; Senku TANAKA
フォトクロミック分子によるπ共役系スイッチングを目指して、さまざまなπ共役系を有するフォトクロミック分子の開発とその評価を行った。フォトクロミックターアリーレンの中央のアリール部に対してπ共役ユニットを導入したところ、π共役系の拡張に伴って吸収の長波長シフトが見出された。さらにフォトクロミック反応前後の吸収波長はそれぞれの構造におけるπ共役系の広がりに対応して変化することが見出され、ターアリーレン系フォトクロミック分子においてπ共役系の方向切り替えが可能であること明らかになった。一方、光によりπ共役分子ワイヤーの形成を目指して、光照射に伴って安定な芳香族ユニットが形成する新しい光化学反応の開発に成功した。この分子では光反応後に形成する中間体から、自発的にメタノールが脱離し、安定な芳香族分子を形成し、さらにπスタックによる超分子集合体を形成することが見出された。類似の反応は従来は酸素などの酸化剤の存在が必要であったらが、脱離ユニットを安定なアルコールとすることで、自発的な光脱離反応が可能となった。
Ministry of Education, Culture, Sports, Science and Technology, 特定領域研究, 奈良先端科学技術大学院大学, Coinvestigator not use grants, Competitive research funding, 17067011

コアシェル構造を有する希土類ナノ結晶の光磁気特性
科学研究費補助金(特定領域研究)
2007 - 2007
長谷川 靖哉; 河合 壯; 中嶋 琢也
二価のユーロピウムEu(II)から構成されるカルコゲナイド(EuX;X=O,S,Se,Te)は強磁性を示す化合物半導体でる。これまでEuXナノ結晶の合成および特異的な光磁気特性が報告されているが、そのナノ結晶の会合状態や配列を制御した例はない1)。大きな磁気光学効果を示すEuXナノ結晶を任意に会合および配列できれば、会合状態に基づく新たな光磁気特性が期待できる。本研究ではEuSのナノサイズ化及びEuSナノ会合体の形状制御を行い、光の放射圧によってナノ粒子を補足して操作するレーザートラッピング法を用いてEuSナノ会合体の形態制御を行った。EuSナノ結晶の原料となるEu(III)錯体は、塩化ユウロピウムと硫黄を含む有機配位子との錯形成により合成した。この錯体を6時間加熱還元し、反応終了後にクロロホルム・ヘキサン混合溶液を用いて精製することにより紫色粉末を得た。得られた紫色粉末のXRD測定の結果より、バルクのEuSのピークと一致することが明らかとなり、Scherer式から算出される平均サイズは11nmとなった。さらに、この立方体型EuSナノ結晶はメタノール中において平均サイズ330nm程度の会合体を形成していることがDLS測定から明らかになった。次にレーザートラッピング法を用いて、ガラス基板上におけるEuS会合体の二次元配列を試みた。レーザートラッピング実験における散乱光強度の経時...
文部科学省, 特定領域研究, 奈良先端科学技術大学院大学, Principal investigator, Competitive research funding, 19018017

Preparation of Novel Photon-mode Molecular switch based on Photcchromic Terarylene Derivatives
Grants-in-Aid for Scientific Research(基盤研究(B))
2005 - 2007
Tsuyoshi KAWAI; 池田 篤志; 長谷川 靖哉; 中嶋 琢也
The properties of pi-conjugated polymers are strongly dependent on the extent of pi-conjugation expansion. The precise control of the expanse of pi-conjugation systems by means of external stimuli including light would give a guiding principle for future photo-switching molecular devices and molecular memories. In particular, photochromic molecules modulating pi-conjugation system reversibly upon light inadiation are expected as a promising material for such photo-switching modules. In this study, we have developed photo-switching molecules based on terarylenes that could control the pi-con...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 奈良先端科学技術大学院大学, Coinvestigator not use grants, Competitive research funding, 17350069

ビナフチル・ペリレンダイマーの単一分子円偏光蛍光計測と光スイッチング
科学研究費補助金(萌芽研究)
2005 - 2007
河合 壯; 内藤 昌信; 長谷川 靖哉; 中嶋 琢也
光学活性分子から発せられる蛍光は右円偏光成分と左円偏光成分の強度が異なり、この現象は円偏光性発光(CPL)と呼ばれる。近年、CPLを基盤にした高輝度液晶ディスプレイ用の偏光光源をはじめとして、3次元ディスプレイ、記憶材料、光通信など高度な光情報プロセッシングが提案されており、幅広い応用が期待されている。本研究では、光学活性なフルオロフォアからなる高特性の円偏光性発光材料の開発を行った。前年度開発されたビナフチルペリレンダイマーは高い蛍光量子収率、高い円二色性をしめし有望である。今年度はビナフチルペリレンダイマーの会合状態におけるCPL非対称性を評価し、さらに光照射に伴うスイッチングを検討した。従来、散乱性媒質におけるCPL非対称性の精密計測は成功例がなく、今回はこのため顕微CPL計測システムの検討を行った。その結果、顕微蛍光計測においても安定で高精度なCPL計測が可能であることを初めて見出した。また、ビナフチルペリレンダイマーの会合状態における発光スペクトルとCPLスペクトルの計測に初めて成功した。会合状態においては特徴的なCPLの増強が観測された。また会合状態においてはCPLの非対称性には特徴的な分散を有することを初めて見出した。これは非結晶性の分子会合状態における局所構造の不均質性を直接観測したものと考えている。分子会合状態をレーザー光により制御することで、CPL特性の光...
文部科学省, 萌芽研究, 奈良先端科学技術大学院大学, Coinvestigator not use grants, Competitive research funding, 17655019

希土類ナノ粒子の光磁気ポーラロン発生に伴うf軌道のスピン制御
科学研究費補助金(特定領域研究)
2005 - 2006
長谷川 靖哉; 河合 壯; 中嶋 琢也
本研究では、EuOやEuSよりも高い光磁気効果が期待されるEuSeナノ粒子の検討を行なった。EuSeナノ粒子の原料となるEu(III)錯体は、セレンを含む有機配位子Se_2P(Ph)_2の誘導体とEu(III)イオンとの錯化反応により合成した。このEu(III)錯体に関して、構造が異なる2種類の錯体を原料としてそれぞれEuSeナノ結晶の合成検討を行った。具体的には、各Eu錯体をHDA(Hexadecylamine)中300℃で24時間熱還元反応を行い、反応終了後に粒子を遠沈させることで紫色の固体粉末を得た。紫色粉末固体の同定は、透過型電子顕微鏡測定(TEM)およびX線粉体解析(XRD)を用いて行った。得られた紫色粉体を含むPMMA薄膜をガラス基板上に作製し、ファラデー測定により光磁気特性の評価を行なった。比較サンプルとして、従来の合成法によって得られたEuSナノ粒子を含むPMMAも同時に調製を行なった。紫色粉体のXRD測定から2θ=25.1^0,28.6^0,41.0^0,48.8^0,59.8^0および67.6^0に回折ピークが観測され、これらのピークはEuSeの(111),(200),(220),(311),(400)および(420)に相当することがわかった。さらに、TEM測定を行ったところ、原料であるEu(III)錯体の化学構造に違いにより、異なった形状(球状および立方...
文部科学省, 特定領域研究, 大阪大学->奈良先端科学技術大学院大学, Principal investigator, Competitive research funding, 17042015

イオン性液体-蛍光性半導体ナノ結晶界面構造反応の単一粒子・単一分子蛍光計測
科学研究費補助金(特定領域研究)
2005 - 2006
河合 壯; 長谷川 靖哉; 中嶋 琢也
II-VI族半導体は発光性材料として広く研究されてきた。特に近年、ナノメートルサイズの半導体結晶においてその発光現象が広く検討されている。ナノ結晶の構造上の特徴として、表面に有機分子を保護層として有していることが挙げられ、さまざまな有機配位子に関する工夫や提案も進められている。このように半導体ナノ結晶は有機化学からの工夫の余地が広く、また界面におけるダイナミックな反応の解析と制御を目指す本特定領域の趣旨からも興味深い研究対象のひとつであると考えられる。本研究ではこれまでに見出されたイオン性液体中におけるCdTeナノ結晶からの蛍光の増強現象の解明とイオン液体中におけるCdTeナノ結晶の単一分子レベルの蛍光計測を進めた。イオン液体中においてはCdTeナノ結晶の蛍光は冷却に伴ってさらに増強されることが見出された。このような低温での蛍光増強は水溶液中で蛍光が低下することとまったく逆の傾向となった。さらに100K以下ではほぼ100%の蛍光量子収率を示すことが明らかになった。また、その発光波長は低温では格子定数の低下に伴い、次第に短波長シフトすることが見出された。20K以下の低温では、逆に発光波長が長波長シフトする現象が見出された。この傾向はCdSeなど関連するナノ結晶で見出されており、励起子の電子準位が電子間の交換相互作用により分裂していることに対応している。ナノ結晶の粒径が小さくなる...
文部科学省, 特定領域研究, 奈良先端科学技術大学院大学, Coinvestigator not use grants, Competitive research funding, 17034042

非対称型ユーロピウム(III)錯体の分子設計と光物理特性
科学研究費補助金(若手研究(B))
2003 - 2005
長谷川 靖哉
非対称型ユーロピウム錯体、Eu(hfa)3(TPPO)2をポリフェニルシルシスキ,オキサン(polyphenylsilsesqioxane : PPSQ)中にドープすることにより、錯体の非対称構造に基づくレーザー発振特性の向上を明らかにした。さらに、配位子場を非対称化させることにより、Eu(hfa)3(TPPO)2よりも優れたレーザー発振特性を導くことに成功した。これらのユーロピウム錯体の非対称構造はX線構造解析により明らかにし、その非解消構造に基づく電子遷移許容化の程度は量子化学計算(Judd-Ofelt解析)により見積を行なった。これらの解析結果から、ユーロピウム錯体の発光特性向上には非対称構造が極めて重要と結論した。さらに、非対称配位子場を有するユーロピウム4核錯体(クラスター)の合成も行なった。このユーロピウム多核錯体は強発光特性とともに「熱耐久性」にも優れ、300℃以上の加熱においても発光特性を維持できることが明らかとなった。この特異的な「熱耐久性」は4つのユーロピウムイオンからなるネットワーク構造が重要と考えられる。さらに、配位子による「配位部位の非対称構造」が優れた発光特性を可能にしていると結論づけた。本研究は、強発光特性を示す希土類錯体を材料へ展開する上で興味深い成果である。また、以上の考え方を応用することにより、強発光テルビウム錯体の合成にも成功した。このテ...
文部科学省, 若手研究(B), 大阪大学->奈良先端科学技術大学院大学, Principal investigator, Competitive research funding, 15750155

ナノサイズ酸化ユーロピウム(II)の合成および光磁気特性
科学研究費補助金(奨励研究(A), 若手研究(B))
2001 - 2002
長谷川 靖哉
概要高強度エキシマーレーザー照射によるEuOナノ結晶の合成に成功した。本系においては繰り返し周波数1Hz、レーザー強度130mJに設定し、レーザー光を1000回サンプル(硝酸ユーロピウム(III)、尿素、メタノール)に照射することにより、結晶性の高い、平均粒径4.7nmのナノサイズEuOが得られた。得られたEuOナノ結晶は青色領域に強発光を示すことが発光スペクトル測定より明らかとなった。合成時間は約15分であり、これまでの水銀ランプによる光還元法(72時間光照射)に較べて極めて速い時間でEuOの合成が可能になった。さらに、レーザー照射回数毎の発光スペクトルおよび吸収スペクトルを測定したところ、EuOナノ結晶の結晶成長に重要なEu(II)の前駆体の存在が明らかとなった。本研究はEuOナノ結晶の結晶成長のメカニズム解明に重要な知見を与えた。一方、前年度報告した液体アンモニア法によるEuOナノ結晶合成を応用して、EuS(硫化ユーロピウム(II))ナノ結晶の合成に成功した。本合成法は液体アンモニアに硫化水素を吹き込むことにより合成ができ、平均粒径20nmのEuSが得られた。このEuSナノ結晶は磁化率測定(SQUID)により強磁性を示すことが明らかとなった。世界初のEuSナノ結晶の合成および磁気特性を本研究により明らかとした。
文部科学省, 奨励研究(A), 若手研究(B), 大阪大学, Principal investigator, Competitive research funding, 13740397

Nanohybrid for Emission Constructed with Nanozone and Molecules
Grants-in-Aid for Scientific Research(基盤研究(B))
2000 - 2002
Yuji WADA; 長谷川 靖哉; 北村 隆之; 柳田 祥三
Absorption of Nd(III) is weak due to forbidden f-f transition. We have employed 8-quinolinol with strong absorption as a photosensitizer and succeeded in photoluminescence in near-infrared region through energy transfer from the excited state to Nd(III) encapsulated in a zeolite cavity. Nd(III) was ligated by bis-perfluoromethylsulfoarride for providing a low-vibration condition. 8-Quinolinol was introduced into the zeolite cavity, resulting in photosensitized emission of Nd(III).Ruthenium tris-bipyridyl complex formed in the zeolite cavity was successfully employed as a photosensitizer for...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 大阪大学, Coinvestigator not use grants, Competitive research funding, 12450345

Research for Practical Applications of Dye-sensitized Solar Cells
Grants-in-Aid for Scientific Research(基盤研究(A))
1999 - 2001
Shozo YANAGIDA; 村澤 貞夫; 北村 隆之; 和田 雄二; 長谷川 靖哉
(1) Electron transfer mechanism in quasjsoldstate electrolyte which was solidified by using lowmolecular weight gelater in dyesensitized solar cells was examined, It is revealed that not only ion diffusion but also electron hopping.including bond exchange in iodide (Grotthusstype diffusion) contributed to the electron transfer. High performance dye sensitized solar cells based on ionic liquid which is the liquid at room temperature, low volatility and no flammability, were successfully fabricated. They showed good stability at higher temperature (80℃, 1, 000 hours).(2) It was reveled that t...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(A), 大阪大学, Coinvestigator not use grants, Competitive research funding, 11358006

無機ナノゼオライトホストによる導電性高分子の高秩序配列化と新物性
科学研究費補助金(特定領域研究(A))
2000 - 2000
和田 雄二; 長谷川 靖哉; 北村 隆之; 柳田 祥三
概要1)ナノサイズホージャサイト型ゼオライトの合成を文献に基づきその手法を確立した。そのナノゼオライトをネオジム交換し、さらにフッ素アルキル基を含むスルホニルアミド(PMS)を配位子として、ネオジム錯体をゼオライト細孔内に合成した。このゼオライトは、(Nd(PMS)-n-FAU)は、ジメチルスルホキシド中に安定に分散することが、DLS測定ならびに吸収スペクトルから明らかとなった。吸収スペクトルには、ネオジムに起因のf-f遷移がみられた。未処理のものはほとんど分散しないことことから、PMSはn-FAU粒子の外表面を化学的に修飾することにより、分散を促進していることがわかった。吸収スペクトルから、均一に溶解したと仮定したジメチルスルホキシド中のネオジム濃度は8.7mMと計算された。発光スペクトルには、ネオジムの遷移に帰属される近赤外領域の発光が観測された。寿命は22msで一次減衰であった。吸収スペクトルの形状からネオジムは、対称性の高い環境に存在しすることがわかった。重水素化ジメチルスルホキシド中の発光量子収率は有機媒体中における最高値9.5%と、錯体溶液の値、3.3%の3倍にも向上したことから、ゼオライトは低振動ホストとして優れていると結論できる。この値は、有機溶媒中におけるネオジムからの発光として最高値である。2)ナノサイズホージャサイト型ゼオライトをユーロピウムで交換し、か...
文部科学省, 特定領域研究(A), 大阪大学, Coinvestigator not use grants, Competitive research funding, 12020232

超高圧下での有機光化学反応
科学研究費補助金(萌芽的研究)
1999 - 2000
柳田 祥三; 北村 隆之; 和田 雄二; 長谷川 靖哉
基底状態のオリゴパラフェニレンは,気相中や溶液中では隣り合う芳香環同士が互いにおよそ20度程度捻れた構造を取り,光励起状態では共平面状態になるという構造変化を引き起こす。さまざまなオリゴフェニレン誘導体の光物性を高圧条件下に測定し,吸収,蛍光スペクトルの長波長シフトと,吸光度の増加,蛍光量子収率の減少が観測された。これらの変化は,圧力の増加に伴う溶媒の誘電率が上昇したために起こる基底状態分子への作用と,溶媒の粘度が上昇したことに伴う,励起状態での構造緩和過程への作用とによることが明らかとなった。一方部分フッ素化パラフェニレン類は,基底状態で会合体を形成するが,圧力の上昇に伴い会合体の形成が促進されることが明らかとなった。また励起状態では,構造の緩和過程が促進されるため,発光量子収率の増加が観測された。パラフェニレン類のこれらの光物性の変化は,圧力の印可に伴う溶質分子,あるいは溶媒分子との間の分子間相互作用の増強によることを明らかにした。アゾベンゼンとソのぺルフルオロ体の光異性化反応を希薄溶液中高圧条件下に測定し,異性化の速度,および定常状態でのcis-trans比を求めた。圧力が高い場合にはtrans体の生成比が増大し,励起中間体から基底状態のtrans体への失活過程の活性化体積が小さいことが判明した。一方,これら両化合物の1:1混合溶液の場合,逆に圧力の印可に伴いcis体の...
文部科学省, 萌芽的研究, 大阪大学, Coinvestigator not use grants, Competitive research funding, 11875188

発光材料、酸素センサー、及び塗料
Patent right, 北川裕一; 中井拓真; 島かおり; 庄司淳; 長谷川靖哉; 伏見公志
特願2022-03353, 04 Mar. 2022

希土類錯体、発光材料、発光体、及び、ホスフィンオキシド基を有する化合物
Patent right, 長谷川靖哉; 林嬢; 北川裕一; 伏見公志
特願2021-074135, 26 Apr. 2021

発光材料;発光インク;発光体及び発光デバイス
Patent right, 長谷川靖哉; ツァンテン; 北川裕一
特願2020-119391, 10 Jul. 2020

ビスホスフィンオキシド希土類錯体及び光学機能性材料
Patent right, 長谷川靖哉、北川裕一、鶴井真、田村健、佐野夏博
特願2019-132858, 18 Jul. 2019

希土類錯体, 希土類錯体溶液、発光性成形体、発光性物品を製造する方法
Patent right, 北川裕一、島かおり、和田智志、長谷川靖哉、伏見公志
特願2019-085626, 26 Apr. 2019

希土類化合物、ホスフィンオキシド化合物及び発光体
Patent right, 北川裕一; 鈴江郁哉; 長谷川靖哉; 伏見公志
特願2018-241307, 25 Dec. 2018

希土類錯体、発光体及び発光デバイス
Patent right, 長谷川靖哉; フェレイラダダローサペドロパウロ; 北川裕一; 伏見公志
特願2018-158240, 27 Aug. 2018

希土類錯体、放射線治療用光学イメージング剤、中性子線検出用シンチレーター及びカルボラン誘導体
Patent right, 長谷川靖哉、齋藤康樹、北川裕一、中西貴之、伏見公志
特願特願2019-30678, 28 Jun. 2018

希土類錯体ポリマー及び発光体
Patent right, 中西貴之; 松田賢司; 沢登拓矢; 北川裕一; 伏見公志; 長谷川靖哉
特願2018-011508, 2018

希土類錯体及び発光材料
Patent right, 北川裕一; 鈴江郁哉; 中西貴之; 伏見公志; 長谷川靖哉
特願2017-035043, 27 Feb. 2017

ホスフィンオキシド化合物、希土類錯体及び発光材料
Patent right, 長谷川靖哉; フェレイラ ダ; ローサ; ペドロ パウロ; 中西貴之; 北川裕一; 伏見公志
特願2017-035041, 27 Feb. 2017

希土類化合物、発光体、発光デバイス、波長変換材料及びセキュリティ材料
Patent right, 中西貴之; 袴田翔; 北川裕一; 伏見公志; 長谷川靖
特願2017-221678, 2017

Eu錯体及び有機EL素子
Patent right, 長谷川靖哉; 名取詩織; 中西貴之; 北川裕一; 伏見公志; 赤木努; 内藤裕義; 福留淳
特願2016-170553, 01 Sep. 2016

近赤外線発光を示すポルフィリンガラス
Patent right, 森末光彦; 佐々木園; 中西貴之; 長谷川靖哉
特願2016-161750, 22 Aug. 2016

キラル型希土類錯体ポリマーおよびそれを用いた光学機能材料
Patent right, 長谷川靖哉; 北川裕一; 中西貴之; 伏見公志; 小礒尚之
特願2016-135217, 07 Jul. 2016

希土類錯体ポリマー
Patent right, 中西貴之; 平井悠一; 北川裕一; 伏見公志; 長谷川靖哉
特願2016-092667, 2016

蛍光材料、蛍光材料の発光スペクトルを制御する方法及び蛍光システム
Patent right, 中西貴之; 松井貴文; 北川裕一; 伏見公志; 長谷川靖哉
特願2016-122896, 2016

発光材料、インク、及び発光デバイス
Patent right, 中西貴之; 岡井翼; 北川裕一; 伏見公志; 長谷川靖哉; 田中一生; 権正行; 中條善樹
特願2016-176913, 2016

キラル型希土類錯体ポリマーおよびそれを用いた光学機能材料
Patent right, 長谷川靖哉; 三浦由衣; 北川裕一; 中西貴之; 伏見公志; 小礒尚之
特願2016-019164, 2016

高分子錯体及びその製造方法,長谷川靖哉
Patent right, 中島綾子; 中西貴之; 北川裕一; 伏見公志
特願2015-45416, 2015
特許第6666009号

希土類錯体及びその製造方法、並びにプラスチック成形体
Patent right, 長谷川靖哉; 小野寺宏光
特願2015-046001, 2015

希土類錯体および発光素子
Patent right, 北川裕一; 大野良輔; 長谷川靖哉; 伏見公志; 中西貴之
特願2015-045930, 2015

希土類錯体、発光材料及びその製造方法、並びに発光シート
Patent right, 中西貴之; 岡井翼; 長谷川靖哉; 北川裕一; 伏見公志
特願2015-046202, 2015

希土類金属錯体及びそれを用いる発光装置
Patent right, 長谷川靖哉; 柳澤慧; 中西貴之; 北川裕一; 伏見公志; 小飯塚徹
特願2015-003282, 2015
特許第6643804号

三光子励起により発光する発光性組成物
Patent right, 川俣純; 鈴木康孝; 守友博紀; 藤井旺成; 長谷川靖哉; 山本昌紀
特願2014-205115, 2014

配位子、高分子錯体及びその製造方法
Patent right, 長谷川靖哉; 山本昌紀; 中西貴之; 伏見公志
特願2014- 023813, 2014

有機ELデバイス用薄膜及びその製造方法
Patent right, 長谷川靖哉; 菅原猛司; 赤木努; 砂糖正典; 上野一彦
特願2013-183620, 2013

希土類錯体ポリマーとその製造方法、及びプラスチック成形体
Patent right, 小野寺宏光; 長谷川靖哉
特願2013-183142, 2013

配位子および希土類錯体
Patent right, 長谷川靖哉; 平井悠一; 中西貴之; 伏見公志
特願2013-141994, 2013

シート集積型希土類錯体及びその用途
Patent right, 長谷川靖哉; 立野栞; 中西貴之; 伏見公志
特願2013-141995, 2013

発光性複合材料および発光体ナノ結晶
Patent right, 小野寺宏光; 長谷川靖哉
特願2012-245490, 2012

機能性材料の構造体及び機能性材料の構造体の製造方法
Patent right, 中西貴之; 長谷川靖哉; 前田将司; 川島祥; 伏見公志
特願2011-264892, 2011

希土類錯体ポリマー
Patent right, 長谷川靖哉; 宮田康平; 伏見公志; 加藤昌子; 小林厚志
特願2011-103136, 2011

金属イオンドープEu(II)化合物のナノ結晶及び薄膜
Patent right, 長谷川靖哉; 前田将司; 熊谷美那; 伏見公志
特願2011-047623, 2011

Eu(II)化合物及び金属を含有する複合ナノ結晶及び複合薄膜
Patent right, 長谷川靖哉; 川島祥; 熊谷美那; 伏見公志
特願2011-047595, 2011

円偏光発光性希土類錯体
Patent right, 湯浅順平; 宮田康平; 妻鳥紘之; 原田聖; 長谷川靖哉; 河合壯
特願2012-504424, 2011
特許第5713360号

希土類錯体及びその利用
Patent right, 長谷川靖哉; 河合壯; 中嶋琢也; 中川哲也; 宮田康平
特願2009-176558, 2009
US 8,975,385 B2

金属錯体およびその利用
Patent right, 河合壯; 長谷川靖哉; 中川哲也
特願2009-120950, 2009

希土類錯体およびその利用
Patent right, 長谷川靖哉; 河合壯; 原田聖
特願2009-503899, 2009
特許第5371009号