Researcher basic information

• 博士(工学), 東京大学

• https://researchmap.jp/11kinnnikumanio?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201401077978836691

• 201401077978836691

• Nanotechnology/Materials, Inorganic/coordination 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

Research activity information

• Feb. 2026, 北海道庁, 北海道科学技術奨励賞
  高色純度の赤色光を強く放つ発光体の開発
• Oct. 2025, 北海道大学, 第11回 北大部局横断シンポジウム奨励賞(金賞)
  次世代の植物工場に向けた円偏光波長変換フィルムの開発
• May 2024, 日本希土類学会, 日本希土類学会奨励賞（足立賞）
  芳香族配位子の電子構造制御に基づく希土類錯体の高機能化
• Oct. 2023, 北海道大学, 第9回北大部局横断シンポジウム 部局横断型若手研究助成事業奨励賞(金賞)
  光波長変換フィルムの実用化に向けて：高耐光性を示す二核希土類錯体の開発
• Feb. 2023, 日本化学会, 日本化学会北海道支部奨励賞
  「π電子構造制御による希土類錯体の機能化」
• Mar. 2022, 北海道大学, 工学研究院 若手教員奨励賞
• Oct. 2021, 北海道大学, 第7回北大部局横断シンポジウム 部局横断型若手研究助成事業奨励賞(銀賞)
  「発光性錯体の社会実装に向けて: 計算科学と実験科学の連携による 高輝度希土類発光体の開発」
  北川裕一
• Sep. 2021, 光化学協会, The Japanese Photochemistry Association Award for Young Scientist
  「π共役分子を用いた光機能ユウロピウム化合物の開拓」
  Yuichi Kitagawa
• Sep. 2012, 2012年光化学討論会, 優秀学生講演賞(ポスター)
  「励起子キラリティーに基づいた磁気キラル二色性」
  北川裕一
• Sep. 2012, 錯体化学会第62回討論会, ポスター賞
  「光合成細菌における光捕集アンテナの磁気キラル二色性」
  北川裕一
• Jul. 2011, IIS PhD Student Live, Best Presentation Award
  「Magneto-Chiral Dichroism of Organic Compounds」
  北川裕一
• Aug. 2010, 第22回配位化合物の光化学討論会, ポスター賞(優秀賞)
  「ポルフィリンJ会合体の磁気キラル二色性」
  北川裕一
• Sep. 2009, 日本化学会第3回関東支部大会, 優秀ポスター賞
  「回転が誘起した有機化合物の磁気キラル二色性」
  北川裕一

• Dynamic Molecular Triplet Excitons in Lanthanide Complex Assemblies for Ultrasensitive Optical Oxygen Sensing
  Takuma Nakai; Mengfei Wang; Sunao Shoji; Koji Fushimi; Yasuchika Hasegawa; Takayuki Nakanishi; Yuichi Kitagawa
  ACS Materials Letters, American Chemical Society (ACS), 08 Jun. 2026, [Last author, Corresponding author]
  Scientific journal
• Molecular design strategy for solution-phase magneto-chiral photochemistry
  Kosuke Itaya; Kaoru Koizumi; Kota Inage; Mengfei Wang; Kazuyuki Ishii; Yasuchika Hasegawa; Shojiro Kimura; Yuichi Kitagawa
  Chemical Communications, Royal Society of Chemistry (RSC), Jun. 2026, [Last author, Corresponding author]
  Scientific journal, Strong magneto-chiral dichroism signals were demonstrated in chiral tetrakis-type Eu( iii ) complexes in the solution phase at room temperature.
• Superacid-resistant macrocyclic BODIPYs
  Keita Watanabe; Gentaro Honda; Yuki Terauchi; Shunsuke Mamiya; Yuya Inaba; Tasuku Nakajima; Jian Ping Gong; Yusaku Yamaguchi; Yuichi Kitagawa; Yasuchika Hasegawa; Yuki Ide; Min Gao; Tomoki Yoneda; Yasuhide Inokuma
  Nature Communications, 17, 1, Springer Science and Business Media LLC, 19 Mar. 2026
  Scientific journal, Abstract
  
  Boron-dipyrromethenes (BODIPYs) are versatile fluorophores with intense fluorescence and broad applications in bioimaging and sensing. However, they undergo deboronation under acidic conditions, which causes fluorescence degradation. Herein, we designed exceptionally acid-stable BODIPYs by harnessing the synergistic boron-chelation effect of calix[3]pyrrole-like macrocycles. We show that their characteristic optical properties are retained in strongly acidic media, including superacids, without undergoing deboronation. Macrocyclic BODIPYs exhibit sharp absorption and protonation-induced fluorescence switching, with quantum yields of up to 0.90 and narrow Stokes shifts. Notably, no deboronation was observed even in non-diluted fluorosulfuric acid, and visible fluorescence was sustained for over a day. Beyond their unusual acid resistance, the macrocyclic BODIPYs had higher thermal- and photostability compared with conventional BODIPYs. Peripheral substitution allowed the modulation of absorption and emission wavelengths, and fluorous-tagging through axial ligand exchange enabled fluorescence switching in response to perfluorooctanoic acid in a fluorous solvent. We used superacid-resistant BODIPYs as acid indicators for the fluorescence staining of Nafion beads and sulfonylated gels, which are too acidic to sustain the fluorescence emission of conventional BODIPYs. Our findings expand the scope of BODIPYs into strongly acidic, non-aqueous environments, opening opportunities for fluorescence imaging and sensing in materials and biological systems.
• Asymmetric Eu(III) Coordination Polymers Featuring Coexisting Δ/Λ Chirality and Diverse Coordination Geometries
  Mengfei Wang; Yuki Yamazaki; Sunao Shoji; Koji Fushimi; Yuichi Kitagawa; Yasuchika Hasegawa
  Inorganic Chemistry, 65, 11, 5919, 5926, American Chemical Society (ACS), 06 Mar. 2026
  Scientific journal
• Doublet charge transfer emission of cerium(III) complexes with strong electron-accepting ligands
  Tomikawa, Toranosuke; Saita, Kenichiro; Ono, Yuriko; Akama, Tomoko; Wang, Mengfei; Shoji, Sunao; Kobayashi, Masato; Fushimi, Koji; Nakanishi, Takayuki; Taketsugu, Tetsuya; Hasegawa, Yasuchika; Kitagawa, Yuichi
  The Journal of Physical Chemistry Letters, Dec. 2025, [Last author, Corresponding author]
• Cyclic Porphyrin Dimers with a Slipped Cofacial Arrangement Through Coordination Linkage of Phosphine Oxide Substituents with Yb(III) and Lu(III) Complexes
  Sunao Shoji; Kota Inage; Saki Mori; Yuichi Kitagawa; Yasuchika Hasegawa; Koji Fushimi; Yuji Mikata; Takashi Kitayama
  EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 28, 28, 11 Oct. 2025
  English, Scientific journal
• 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, Sep. 2025, [Last author, Corresponding author]
  Scientific journal
• Dynamic Molecular Triplet Excitons Tune Lanthanide Emission Lifetime
  Takuma Nakai; Kaori Shima; Sunao Shoji; Koji Fushimi; Takayuki Nakanishi; Yasuchika Hasegawa; Yuichi Kitagawa
  Angewandte Chemie-International Edition, e202513236, 26 Aug. 2025, [Last author, Corresponding author]
• 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.
• Charge transfer emission between π- and 4f-orbitals 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
  Communications Chemistry, 8, 1, Springer Science and Business Media LLC, 28 Jan. 2025, [Lead author, Corresponding author]
  Scientific journal
• 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
  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
  Scientific journal
• 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, [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, [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
  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
  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, [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, [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
  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, [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
  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
  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
  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
  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
  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
  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], [Lead author, 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
  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
  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
  Scientific journal
• Luminescent Lanthanide Complexes for Effective Oxygen‐Sensing and Singlet Oxygen Generation
  Yuichi Kitagawa; Takuma Nakai; Shota Hosoya; Sunao Shoji; Yasuchika Hasegawa
  ChemPlusChem, Wiley, 09 Feb. 2023
  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
  Scientific journal
• 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.
• A switchable system between magnetic and natural circularly polarised luminescence via J-aggregation using photosynthetic antenna model compounds
  Toranosuke Tomikawa; Yuichi Kitagawa; Koki Yoshioka; Kei Murata; Tomohiro Miyatake; Yasuchika Hasegawa; Kazuyuki Ishii
  Journal of Materials Chemistry C, 11, 8, 2831, 2835, Royal Society of Chemistry (RSC), 2023
  Scientific journal, Using zinc-chlorin, the switching of MCPL/CPL via J-aggregation has been clearly demonstrated for the first time.
• 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.
• 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
• 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, Springer Science and Business Media LLC, Dec. 2022, [Peer-reviewed]
  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.
• 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
  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, American Chemical Society (ACS), 27 Oct. 2022
  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, Springer Science and Business Media LLC, 26 Oct. 2022
  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.
• Amorphous lanthanide complexes for organic luminescent materials
  Joe Hayashi; Sunao Shoji; Yuichi Kitagawa; Yasuchika Hasegawa
  Coordination Chemistry Reviews, 467, 214607, 214607, Elsevier BV, Sep. 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, Wiley, 13 Jul. 2022
  Scientific journal
• 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
  Scientific journal
• Luminescent Eu(III)-based Coordination Polymers for Photonic Materials
  Yasuchika Hasegawa; Sunao Shoji; Yuichi Kitagawa
  Chemistry Letters, 51, 2, 185, 196, The Chemical Society of Japan, 05 Feb. 2022
  Scientific journal
• Tribo-Excited Chemical Reaction Using an Eu-III Complex with a Stacked Anthracene Framework
  Yuichi Kitagawa; Ayu Naito; Kota Aikawa; Kaori Shima; Sunao Shoji; Koji Fushimi; Yasuchika Hasegawa
  Chemistry-A European Journal, 28, 16, 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
• Difluoroboron complexes of peripheral β-diketonates in cyclopheophorbides: Their syntheses and optical properties
  Haruki Ishikawa; Ayaka Demise; Yuichi Kitagawa; Yoshinao Shinozaki; Yusuke Kinoshita; Hitoshi Tamiaki
  Tetrahedron, 104, 132596, 132596, Elsevier BV, Jan. 2022
  Scientific journal
• Charge-transfer excited states of pi- and 4f-orbitals for development of luminescent Eu(iii) complexes
  Yuichi Kitagawa; Pedro Paulo Ferreira da Rosa; Yasuchika Hasegawa
  DALTON TRANSACTIONS, 50, 42, 14978, 14984, Nov. 2021
  English
• Hybrid Eu(III) Coordination luminophore Standing on Silica Nanoparticles By Two Legs for Enhanced Luminescence
  Teng Zhang; Yuichi Kitagawa; Ryoma Moriake; Pedro Paulo Ferreira da Rosa; Md Jahidul Islam; Tomoki Yoneda; Yasuhide Inokuma; Koji Fushimi; Yasuchika Hasegawa
  Chemistry – A European Journal, 27, 58, 14438, 14443, Wiley, 18 Aug. 2021
  Scientific journal
• Isopyrazole‐Masked Tetraketone: Tautomerism and Functionalization for Fluorescent Metal Ligands
  Hayato Shirakura; Yumehiro Manabe; Chika Kasai; Yuya Inaba; Makoto Tsurui; Yuichi Kitagawa; Yasuchika Hasegawa; Tomoki Yoneda; Yuki Ide; Yasuhide Inokuma
  European Journal of Organic Chemistry, 2021, 30, 4345, 4349, Wiley, 13 Aug. 2021
  Scientific journal
• Amide-bridged Eu(III) coordination polymer for stable luminescent glass material
  Joe Hayashi; Sunao Shoji; Yuichi Kitagawa; Koji Fushimi; Yasuchika Hasegawa
  Materials Letters, 297, 130012, 130012, Elsevier BV, Aug. 2021
  Scientific journal
• Long-lived emission beyond 1000 nm: control of excited-state dynamics in a dinuclear Tb(iii)-Nd(iii) complex
  Yuichi Kitagawa; Kenji Matsuda; Pedro Paulo Ferreira da Rosa; Koji Fushimi; Yasuchika Hasegawa
  Chemical Communications, 57, 65, 8047, 8050, Aug. 2021, [Peer-reviewed], [Lead 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
• Strong circularly polarized luminescence of mixed lanthanide coordination polymers with control of 4f electronic structures
  Md Jahidul Islam; Yuichi Kitagawa; Makoto Tsurui; Yasuchika Hasegawa
  Dalton Transactions, 50, 16, 5433, 5436, Royal Society of Chemistry, 28 Apr. 2021
  English, Scientific journal
• Thermo‐Sensitive Eu III Coordination Polymers with Amorphous Networks
  Yasuchika Hasegawa; Natsumi Sato; Joe Hayashi; Yuichi Kitagawa; Koji Fushimi
  ChemistrySelect, 6, 12, 2812, 2816, Wiley, 26 Mar. 2021, [Peer-reviewed]
  Scientific journal
• Synthesis of Highly Fluorescent Cationic Chlorophyll-a Derivatives Possessing a p-Aminopyridinio Group at the 31-Position
  Shin Ogasawara; Tatsuya Takahashi; Yuichi Kitagawa; Hitoshi Tamiaki
  Bulletin of the Chemical Society of Japan, The Chemical Society of Japan, 03 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
• <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
• Rapid Method to Measure Hydrogen Diffusion Coefficient in Metal Using a Multi-sine Wave Signal,
  Yamamoto Yudai; Kitagawa Yuichi; Hasegawa Yasuchika; Fushimi Koji
  ISIJ Int., 61, 4, 1064, 1070, 2021, [Peer-reviewed]
  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 Int., 61, 4, 1112, 1119, 2021, [Peer-reviewed]
  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), 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), 2021, [Lead author, Corresponding author]
  Scientific journal
• Chiral lanthanide lumino-glass for a circularly polarized light security device
  Yuichi Kitagawa; Satoshi Wada; M. D. Jahidul Islam; Kenichiro Saita; Masayuki Gon; Koji Fushimi; Kazuo Tanaka; Satoshi Maeda; Yasuchika Hasegawa
  Communications Chemistry, 3, 1, Springer Science and Business Media LLC, Dec. 2020, [Peer-reviewed], [Lead author, Corresponding author]
  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, 09 Nov. 2020, [Peer-reviewed], [Lead author, Corresponding author]
  Scientific journal
• First Tribo‐excited Chemical Reaction of a Stacked Lanthanide Coordination Polymer with in Situ Reaction Monitor
  Yuichi Kitagawa; Ayu Naito; Koji Fushimi; Yasuchika Hasegawa
  Chemistry – A European Journal, 27, 7, 2279, 2283, Wiley, 22 Oct. 2020, [Peer-reviewed], [Lead author, Corresponding author]
  Scientific journal
• Circularly Polarized Absorption and Luminescence of Semiconductor Eu‐OCN Nanocrystals in the Blue Region of the Electromagnetic Spectrum
  Yasuchika Hasegawa; Katsumasa Koide; Makoto Tsurui; Yuichi Kitagawa; Takayuki Nakanishi; Yoshihiro Doi; Yukio Hinatsu; Koji Fushimi
  ChemPhysChem, 21, 17, 2019, 2024, Wiley, 02 Sep. 2020, [Peer-reviewed]
  Scientific journal
• An Europium (III) Luminophore with Pressure‐Sensing Units: Effective Back Energy Transfer in Coordination Polymers with Hexadentate Porous Stable Networks
  Yasuchika Hasegawa; Takuya Sawanobori; Yuichi Kitagawa; Sunao Shoji; Koji Fushimi; Yuta Nakasaka; Takao Masuda; Ichiro Hisaki
  ChemPlusChem, 85, 9, 1989, 1993, Wiley, Sep. 2020, [Peer-reviewed], [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.
• Dual Energy Transfer Pathways from an Antenna Ligand to Lanthanide Ion in Trivalent Europium Complexes with Phosphine-Oxide Bridges
  Shiori Miyazaki; Kiyoshi Miyata; Haruna Sakamoto; Fumiya Suzue; Yuichi Kitagawa; Yasuchika Hasegawa; Ken Onda
  The Journal of Physical Chemistry A, 124, 33, 6601, 6606, American Chemical Society (ACS), 20 Aug. 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
  European Journal of Organic Chemistry, 2020, 26, 3965, 3970, 15 Jul. 2020, [Peer-reviewed]
  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
  Scientific journal
• Aggregation-induced emission of a Eu(III) complex via ligand-to-metal charge transfer
  Yuichi Kitagawa; Marina Kumagai; Koji Fushimi; Yasuchika Hasegawa
  Chemical Physics Letters, 749, 137437, 137437, Jun. 2020, [Peer-reviewed], [Lead author, Corresponding author]
  English, 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 transactions (Cambridge, England : 2003), 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], [Lead author, Corresponding author], [International Magazine]
  English, Scientific journal
• 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, 9, 5865, 5871, 06 Mar. 2020, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
  English, Scientific journal
• 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], [Lead author, Corresponding author], [International Magazine]
  English, 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], [Lead author, Corresponding author], [International Magazine]
  English, Scientific journal
• Synthesis of N-methylated unsymmetric porphyrinoids with restricted N-centered chirality from chlorophyll-a
  Yuki Kawamoto; Yasunobu Nagano; Yuichi Kitagawa; Hitoshi Tamiaki
  Organic & Biomolecular Chemistry, 18, 48, 9800, 9804, Royal Society of Chemistry (RSC), 2020
  Scientific journal,

  
  N-Centered chiral stereoisomers of regioselectively N-methylated chlorophyll-a derivatives with a cationic distorted π-skeleton were successfully separated.

• 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, 3, Jan. 2020, [Peer-reviewed], [Lead author, Corresponding author]
• 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
• Chiral Supramolecular Nanoarchitectures from Macroscopic Mechanical Rotations: Effects on Enantioselective Aggregation Behavior of Phthalocyanines
  Mizuki Kuroha; Shohei Nambu; Shingo Hattori; Yuichi Kitagawa; Kazuhiro Niimura; Yuki Mizuno; Fujihiro Hamba; Kazuyuki Ishii
  Angewandte Chemie, 131, 51, 18625, 18630, Wiley, 16 Dec. 2019
  Scientific journal
• Recent advances in studies on the magneto-chiral dichroism of organic compounds.
  Ishii K; Hattori S; Kitagawa Y
  Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 19, 1, 8, 19, Springer Science and Business Media LLC, Dec. 2019, [Peer-reviewed]
  Scientific journal,

  Magneto-chiral dichroism is described in terms of devices and synthesis, and is a clue to explain the homochirality of life.

• Lifetimes of Lanthanide(III) Triboluminescence Excited by Aerodynamic Shock Waves
  Yuichi Hirai; Akira Kotani; Hirotaka Sakaue; Yuichi Kitagawa; Yasuchika Hasegawa
  The Journal of Physical Chemistry C, 123, 44, 27251, 27256, American Chemical Society ({ACS}), 07 Nov. 2019, [Peer-reviewed], ［Internationally co-authored］
  Scientific journal
• Evaluation of Zn2+ Coordination Structures in Chiral Zn2+ Complexes Based on Shape Measurement Factors: Relationships between Activity and the Coordination Structure
  Shin Aoki; Chiharu Kikuchi; Yuichi Kitagawa; Yasuchika Hasegawa; Shotaro Sonoike; Yutaka Saga; Miho Hatanaka
  European Journal of Inorganic Chemistry, 2019, 44, in press, in press, Wiley, Nov. 2019, [Peer-reviewed]
  English, Scientific journal
• Thermal and crystallographic investigation of luminescent Eu(III) coordination polymers with dithiane and dioxane hexyl rings
  Hirai, Y.; Da Rosa, P.P.F.; Kitagawa, Y.; Hasegawa, Y.
  Chemistry Letters, 48, 12, 1544, 1546, 25 Oct. 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]
  Scientific journal
• Chiral Supramolecular Nanoarchitectures from Macroscopic Mechanical Rotations: Effects on Enantioselective Aggregation Behavior of Phthalocyanines.
  Kuroha M; Nambu S; Hattori S; Kitagawa Y; Niimura K; Mizuno Y; Hamba F; Ishii K
  Angewandte Chemie (International ed. in English), 58, 51, 18454, 18459, Wiley, Sep. 2019, [Peer-reviewed]
  Scientific journal
• Thermo-sensitive luminescence of lanthanide complexes, clusters, coordination polymers and metal-organic frameworks with organic photosensitizers
  Yasuchika Hasegawa; Yuichi Kitagawa
  JOURNAL OF MATERIALS CHEMISTRY C, 7, 25, 7494, 7511, 07 Jul. 2019, [Peer-reviewed]
  English, Scientific journal
• Highly luminescent tetranuclear Eu(III) complex with characteristic cavity space
  Toru Koizuka; Yuichi Kitagawa; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
  Inorganica Chimica Acta, 486, 240, 244, 24 Feb. 2019, [Peer-reviewed]
  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
• 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
• Structural Manipulation of Triboluminescent Lanthanide Coordination Polymers by Side-Group Alteration
  Yuichi Hirai; Pedro Paulo Ferreira da Rosa; Takayuki Nakanishi; Yuichi Kitagawa; Koji Fushimi; Tomohiro Seki; Hajime Ito; Yasuchika Hasegawa
  Inorganic Chemistry, 57, 23, 14653, 14659, American Chemical Society ({ACS}), 03 Dec. 2018, [Peer-reviewed]
  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
  Satoshi Wada; Yuichi Kitagawa; Takayuki Nakanishi, Masayuki Gon; Kazuo Tanaka; Koji Fushimi, Chujo Yoshiki; Yasuchika Hasegawa
  Scientific Reports, 8, 16395, Nov. 2018, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Asymmetric Color-Changeable Luminophore with Donor–Acceptor–Donor Structure for Solvent and Temperature Sensitive Properties
  Yuichi Kitagawa; Ryuto Yachi; Takayuki Nakanishi; Koji Fushimi; Yasuchika Hasegawa
  ChemistrySelect, 3, 39, 10905, 10908, 24 Oct. 2018, [Peer-reviewed], [Lead author, Corresponding author]
  Scientific journal
• Time-Dependent Measurement of Hydrogen Penetration into Iron Sheets from a Borate Buffer Solution Using FFT Analysis
  Yamamoto Yudai; Kitagawa Yuichi; Hasegawa Yasuchika; Fushimi Koji
  JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 165, 13, S900, S906, 05 Oct. 2018, [Peer-reviewed]
  English, Scientific journal
• Chiral α-hydroxy acid-coadsorbed TiO₂ photocatalysts for asymmetric induction in hydrogenation of aromatic ketones.
  Kohtani S; Kawashima A; Masuda F; Sumi M; Kitagawa Y; Yoshioka E; Hasegawa Y; Miyabe H
  Chemical communications (Cambridge, England), Oct. 2018, [Peer-reviewed]
• Spiral Eu(iii) coordination polymers with circularly polarized luminescence.
  Hasegawa Y; Miura Y; Kitagawa Y; Wada S; Nakanishi T; Fushimi K; Seki T; Ito H; Iwasa T; Taketsugu T; Gon M; Tanaka K; Chujo Y; Hattori S; Karasawa M; Ishii K
  Chemical communications (Cambridge, England), Sep. 2018, [Peer-reviewed]
• 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]
  Scientific journal
• Covalently linked dimer of chlorophyll-a derivative with an amide bond and its folded conformer
  Tamiaki Hitoshi; Tatebe Tomohiro; Kitagawa Yuichi
  TETRAHEDRON LETTERS, 59, 32, 3120, 3123, 08 Aug. 2018, [Peer-reviewed]
• 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, 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, 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]
  Scientific journal
• Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes /639/638/439/943 /639/638/911 review-article
  Yasuchika Hasegawa; Yuichi Kitagawa; Takayuki Nakanishi
  NPG Asia Materials, 10, 4, 52, 70, 01 Apr. 2018, [Peer-reviewed]
  English
• 20-(N-Methylpyridiniumyl)ethynylated chlorophyll-a derivative with an intense Qx absorption band at a green to orange region
  Yusuke Kamatani; Yuichi Kitagawa; Hitoshi Tamiaki
  Tetrahedron Letters, 59, 11, 978, 981, 14 Mar. 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, 07 Mar. 2018, [Peer-reviewed], [Lead author, Corresponding author]
  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, 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, 2018, [Peer-reviewed]
  English, Scientific journal
• Cyclic triad of chlorophyll-α derivative and its folded conformer
  Hitoshi Tamiaki; Kazuya Nishihara; Tomohiro Tatebe; Yuichi Kitagawa
  Chemistry Letters, 47, 3, 326, 328, 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, 2018, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Liquid-Phase Ion Gun for Local Acidification of Na2S Aqueous Solution and Local Sulfidation of Fe-Cr Alloy Surface
  Fushimi Koji; Nakatsuji Satoshi; Lee Jun-Seob; Kitagawa Yuichi; Nakanishi Takayuki; Hasegawa Yasuchika; Baba Kazuhiko; Tsuri Shiro
  JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 165, 10, C618, C623, 2018, [Peer-reviewed]
• 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
• 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
• 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], [Lead author, Corresponding author]
  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], [Lead author, Corresponding author]
  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
• 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
• 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
• Grain Dependency of a Passive Film Formed on Polycrystalline Iron in pH 8.4 Borate Solution
  Takabatake, Y.; Kitagawa, Y.; Nakanishi, T.; Hasegawa, Y.; Fushimi, K.
  Journal of the Electrochemical Society, 164, 7, C349, C355, 2017, [Peer-reviewed]
  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, 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
• Enhancement of Light Absorption Ability of Synthetic Chlorophyll Derivatives by Conjugation with a Difluoroboron Diketonate Group
  Yusuke Kinoshita; Yuichi Kitagawa; Hitoshi Tamiaki
  CHEMISTRY-A EUROPEAN JOURNAL, 22, 29, 9996, 10001, Jul. 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, Apr. 2016, [Peer-reviewed]
  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, [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], [Lead author, Corresponding author]
  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, Mar. 2016, [Peer-reviewed]
  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, [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
• 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, [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, [Peer-reviewed]
  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, [Peer-reviewed]
  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, [Peer-reviewed]
  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, [Peer-reviewed]
  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, [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
• 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, Electrochemical Society Inc., 2016, [Peer-reviewed]
  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
• Unique photophysical properties of chlorophyll derivatives linked with CO2-reducing moiety along the Qy axis
  Yuichi Kitagawa; Shin Ogasawara; Daisuke Kosumi; Hideki Hashimoto; Hitoshi Tamiaki
  JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 311, 104, 111, Oct. 2015, [Peer-reviewed], [Lead author, Corresponding author]
  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, 28, 4769, 4774, Oct. 2015, [Peer-reviewed]
  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, [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, [Peer-reviewed]
  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
• 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, [Peer-reviewed]
  English, Scientific journal
• 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, 14 Feb. 2015, [Peer-reviewed]
  English, International conference proceedings
• 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, 14 Feb. 2015, [Peer-reviewed]
  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, 07 Feb. 2015, [Peer-reviewed]
  English, International conference proceedings
• Photophysical Properties of Chlorophyll Derivatives Linked with Rhenium Bipyridine Complexes
  Yuichi Kitagawa; Shin Ogasawara; Daisuke Kosumi; Hideki Hashimoto; Hitoshi Tamiaki
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 88, 2, 346, 351, Feb. 2015, [Peer-reviewed], [Lead author, Corresponding author]
  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
• 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, [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, [Peer-reviewed]
  English, Scientific journal
• Photochemical Reduction of CO2 with Red Light Using Synthetic Chlorophyll-Rhenium Bipyridine Dyad
  Yuichi Kitagawa; Hiroyuki Takeda; Kenji Ohashi; Tsuyoshi Asatani; Daisuke Kosumi; Hideki Hashimoto; Osamu Ishitani; Hitoshi Tamiaki
  CHEMISTRY LETTERS, 43, 8, 1383, 1385, Aug. 2014, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Helicity transfer in rotary evaporator flow
  Fujihiro Hamba; Kazuhiro Niimura; Yuichi Kitagawa; Kazuyuki Ishii
  PHYSICS OF FLUIDS, 26, 1, Jan. 2014
  English, Scientific journal
• Rotation and Anisotropic Molecular Orbital Effect in a Single H2TPP Molecule Transistor
  Shuichi Sakata; Kenji Yoshida; Yuichi Kitagawa; Kazuyuki Ishii; Kazuhiko Hirakawa
  PHYSICAL REVIEW LETTERS, 111, 24, Dec. 2013, [Peer-reviewed]
  English, Scientific journal
• Electronic absorption, MCD, and luminescence properties of porphyrin J-aggregates
  Yuichi Kitagawa; Junji Hiromoto; Kazuyuki Ishii
  JOURNAL OF PORPHYRINS AND PHTHALOCYANINES, 17, 8-9, 703, 711, Aug. 2013, [Peer-reviewed], [Lead author]
  English, Scientific journal
• Magneto-chiral dichroism of artificial light-harvesting antenna
  Yuichi Kitagawa; Tomohiro Miyatake; Kazuyuki Ishii
  CHEMICAL COMMUNICATIONS, 48, 42, 5091, 5093, 2012, [Peer-reviewed], [Lead author]
  English, Scientific journal
• Magneto-Chiral Dichroism of Organic Compounds
  Yuichi Kitagawa; Hiroshi Segawa; Kazuyuki Ishii
  Angewandte Chemie-International Edition, 50, 39, 9133, 9136, 2011, [Peer-reviewed], [Lead author]
  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
• Charge-transfer excited states of π- and 4f-orbitals for development of luminescent Eu(iii) complexes
  北川裕一・鶴井真・長谷川靖哉, PHOTOCHEMISTRY, 53, 2, 74, 81, Aug. 2022
• 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
• 高色純度・高輝度・高耐久性の分子性赤色発光体
  北川裕一, 月刊OPTRONICS, Jul. 2020
• Luminescent lanthanide complex with seven-coordination geometry
  Pedro Paulo Ferreira da Rosa; Yuichi Kitagawa; Yasuchika Hasegawa, Coordination Chemistry Reviews, 406, 01 Mar. 2020
  Elsevier B.V., English, Book review
• 希土類錯体の光機能に関する研究の動向 光学活性の材料&解析ツールとしての利用を考える
  北川裕一, 化学と工業, 72, 3, 232‐233, 01 Mar. 2019
  Japanese
• スピン禁制遷移に基づく磁気円偏光二色性の観測
  北川裕一, ぶんせき, 33, Jan. 2019
• 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
• 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
• Inside Cover: Enhancement of Light Absorption Ability of Synthetic Chlorophyll Derivatives by Conjugation with a Difluoroboron Diketonate Group (Chem. Eur. J. 29/2016)
  Yusuke Kinoshita; Yuichi Kitagawa; Hitoshi Tamiaki, Chemistry - A European Journal, 22, 29, 9846, 11 Jul. 2016
  Wiley-VCH Verlag, English, Report scientific journal
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 光合成細菌における光捕集アンテナの磁気キラル二色性
  北川裕一, Bulletin of Japan Society of Coordination Chemistry (BJSCC), 63, 2014
• Magneto-Chiral Dichroism of Organic Compounds
  ISHII Kazuyuki; KITAGAWA Yuichi, 高分子, 61, 10, 781, 782, 01 Oct. 2012
  Japanese

• 応用物質化学（先端材料化学), 2024年, 修士課程, 総合化学院
• 総合化学特論Ⅰ (Modern Trends in Physical and Material Chemistry), 2024年, 修士課程, 工学院
• 総合化学特論Ⅰ(Modern Trends in Physical and Material Chemistry), 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
• 先端総合化学特論Ⅰ, 2024年, 博士後期課程, 総合化学院
• 総合化学特論Ⅰ (Modern Trends in Physical and Material Chemistry), 2024年, 博士後期課程, 工学院
• 化学結合論, 2024年, 学士課程, 工学部
• 量子化学Ⅰ, 2024年, 学士課程, 工学部
• 応用化学学生実験Ⅰ, 2024年, 学士課程, 工学部

• 高スピン偏極を伴う光波長変換材料の創製
  創発的研究支援事業
  Aug. 2026 - Mar. 2033
  北川裕一
  国立研究開発法人科学技術振興機構, Principal investigator
• 紫外線を効率的に近赤外線に変換するフィルム
  倉田奨励金
  Apr. 2026 - Mar. 2028
  北川裕一
  日立財団, Principal investigator
• α汚染可視化ハンドフットモニタ、可搬型ダストモニタ等の開発
  令和7年度 英知を結集した原子力科学技術・人材育成推進事業 課題解決型廃炉研究プログラム
  Sep. 2025 - Mar. 2028
  北川裕一; 金子純一; 樋口幹雄; 山石直也; 松井浩明; 明渡純; 相馬貢; 佐川直貴; 森下祐樹; 山崎巧; 平戸未彩紀; 木村伸太朗
  文部科学省, Principal investigator
• 紫外線を効率的に赤色円偏光に変換できる高耐久型ユウロピウムガラス
  Apr. 2025 - Mar. 2028
  北川裕一
  公益財団法人 日本板硝子材料工学助成会, Principal investigator
• 1000 T化学反応の探索と解明
  学術変革領域研究（Ａ）
  Aug. 2023 - Mar. 2028
  木村 尚次郎; 永田 崇; 若狭 雅信; 草本 哲郎; 北川裕一
  文部科学省, Coinvestigator
• メカノケミカル反応を利用した多色蓄光粉末
  Apr. 2026 - Mar. 2027
  北川裕一
  ホソカワ粉体工学振興財団, Principal investigator
• 静電気により光エネルギーを蓄えることができる金属錯体の開発
  挑戦的研究（萌芽）
  Sep. 2024 - Mar. 2027
  北川裕一
  日本学術振興会, 北海道大学, Principal investigator, 24K21774
• 次世代の植物工場に向けた円偏光波長変換フィルムの開発
  第11回部局横断型若手研究助成
  Oct. 2025 - Mar. 2026
  北川裕一
  北海道大学, Principal investigator
• 希土類発光体を用いたナノ物質の多次元光コード化
  Apr. 2025 - Mar. 2026
  北川裕一
  公益財団法人 池谷科学技術振興財団, Principal investigator
• 希土類錯体を用いた磁気キラル二色性に基づく発光色変化と不斉反応
  令和7年度共同利用研究課題
  Apr. 2025 - Mar. 2026
  北川裕一; 木村尚次郎
  東北大学 金属材料研究所 附属強磁場超伝導材料研究センター, Principal investigator, 202411-HMKPD-0004
• 高色純度の強い赤色発光を示す高光耐久性ユウロピウム錯体の開発
  Oct. 2023 - Mar. 2026
  北川裕一
  国立研究開発法人科学技術振興機構, A-STEP「産学共同（育成型）」, Principal investigator
• ミセル反応場で合成する希土類配位ナノ粒子の構造制御と光機能材料化
  科学研究費助成事業 基盤研究(B)
  Apr. 2022 - Mar. 2026
  長谷川靖哉; 北川裕一; 庄司淳
  日本学術振興会, Coinvestigator
• 秘密保持のため非公開
  E社 学術コンサルティング
  Apr. 2024 - Mar. 2025
  北川裕一; 長谷川靖哉
  Principal investigator
• 希土類錯体を用いた強い磁気キラル二色性の観測
  共同研究利用課題
  Apr. 2024 - Mar. 2025
  北川裕一; 木村尚次郎
  東北大学 金属材料研究所 附属強磁場超伝導材料研究センター, Principal investigator, 202312-HMKPD-0044
• α汚染可視化ハンドフットクロスモニタの要素技術開発
  令和４年度 英知を結集した原子力科学技術・人材育成推進事業 課題解決型廃炉研究プログラム
  Sep. 2022 - Mar. 2025
  北川裕一; 樋口幹雄; 金子純一; 明渡純; 相馬貢; 森下祐樹
  文部科学省, 北海道大学, Principal investigator
• 若手教員奨励費
  若手教員奨励費
  Apr. 2022 - Mar. 2025
  北川裕一
  北海道大学, 北海道大学, Principal investigator
• 秘密保持のためタイトル非公開
  Apr. 2024 - Oct. 2024
  長谷川靖哉; 北川裕一
  F社 学術コンサルティング
• 希土類錯体を用いた強い磁気キラル二色性の観測
  共同利用研究課題
  Oct. 2023 - Sep. 2024
  東北大学 金属材料研究所附属強磁場超伝導材料研究センター, Principal investigator, 202308-HMKPD-0064
• 秘密保持のためタイトル非公開
  Oct. 2023 - Sep. 2024
  長谷川靖哉; 北川裕一
  D社 学術コンサルティング, Coinvestigator
• 秘密保持のためタイトル非公開
  Oct. 2020 - Sep. 2024
  北川裕一
  A社 寄附金, Principal investigator
• 高効率で太陽光の紫外線を緑色光に変換できるフィルム素材の開発
  2023年度北海道ガス大学研究支援制度
  Aug. 2023 - Jul. 2024
  北川裕一
  北海道ガス, Principal investigator
• 光波長変換フィルムの実用化に向けて：高耐光性を示す二核希土類錯体の開発
  第9回部局横断型若手研究助成
  Oct. 2023 - Mar. 2024
  北川裕一
  北海道大学, Principal investigator
• 挑戦的研究(萌芽)
  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
  Jul. 2021 - Mar. 2024
  北川 裕一
  トリボルミネッセンスとは機械的刺激により結晶が発光する現象である。本現象が発見されたのは約400年前であり、これまでに様々なトリボルミネッセンスを示す有機化合物・無機化合物が報告されてきた。本現象は高エネルギー励起源を用いず力学的刺激で発光エネルギーを獲得することができるため材料化学の観点から注目を集めている。申請者は希土類錯体を用いた強いトリボルミネッセンスの発現に成功している。本研究では力学的刺激により蓄光を示す錯体の創成を目的とした。本年度はそのために光励起で蓄光特性を示す希土類錯体の創成を検討した。
  (i)フェナントレン骨格を導入した二核希土類錯体の合成：フェナントレン骨格を導入した二座ホスフィンオキシド配位子を2,7-ジブロモフェナントレン原料から、二段階反応で合成した。得られた配位子と2 2 6 6-テトラメチル-3 5-ヘプタンジオナートが配位したルテチウム錯体と錯形成反応を行った。単結晶を得ることに成功し、単結晶X線構造解析を行ったところ七配位の錯体が連結した二核構造を形成していることが分かった。このルテチウム錯体は室温条件において紫外光励起により黄色の蓄光を示すことが明らかとなった。
  (ii)ビフェニル骨格を導入した二核希土類錯体の合成：ビフェニル骨格を導入した二座ホスフィンオキシド配位子を4,4'-ジブロモビフェニル原料から、二段階反応で合成した。得られた配位子と2 2 6 6-テトラメチル-3 5-ヘプタンジオナートが配位したルテチウム錯体と錯形成反応を行った。単結晶を得ることに成功し、単結晶X線構造解析を行ったところ七配位の錯体が連結した二核構造を形成していることが分かった。このルテチウム錯体は低温条件において紫外光励起により緑色の蓄光を示すことが明らかとなった。
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 21K18969
• 力学的な刺激により励起反応を誘起できる希土類錯体の構築
  科学研究費助成事業 基盤研究(B)
  Apr. 2020 - Mar. 2024
  北川裕一
  日本学術振興会, Principal investigator
• 音波照射により蓄光する希土類錯体の開発
  野口遵研究助成金
  Apr. 2023
  北川裕一
  公益財団法人野口研究所, Principal investigator
• 電荷移動発光特性を示す希土類(III)錯体の設計法構築
  NIMS連携拠点推進制度
  Sep. 2022 - Mar. 2023
  国立研究開発法人物質・材料研究機構, Principal investigator
• 秘密保持のためタイトル非公開
  学術コンサルティング
  Jan. 2022 - Apr. 2022
  北川裕一
  C社, Principal investigator
• 発光性錯体の社会実装に向けて: 計算科学と実験科学の連携による 高輝度希土類発光体の開発
  第7回部局横断型若手研究助成
  Oct. 2021 - Mar. 2022
  北川裕一
  北海道大学, Principal investigator
• Sensing techniques usign lanthanide emission as Information medium
  JST A-STEPトライアウトタイプ
  May 2021 - Mar. 2022
  北川裕一
  Japan Science and Technology Agency, JST A-STEPトライアウトタイプ, Principal investigator
• Elucidation of crystal plane-selective photoasymmetric hydrogenation reaction on shape-controlled titanium oxide nanocrystals
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
  Apr. 2019 - 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, Coinvestigator, 19K05681
• Asymmetric reaction based on mechanical force using assembled asymmetric coordination field
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
  Apr. 2019 - Mar. 2021
  北川 裕一
  力学的刺激によって引き起こされる化学反応は有機溶媒を必要としないだけでなく、特異的な反応選択性を示すことも報告されており、近年注目を集めている。これまで力学的刺激によって主に「基底状態」における化学反応が報告されてきた。本研究では力学的な刺激により「励起状態」を形成する希土類錯体に着目した。この希土類錯体は八配位構造を形成し、有機配位子を密に集積させることができる。この有機配位子として反応性が高いアントラセン骨格を導入した希土類錯体を用いて、力学励起反応特性およびそれにより生じる結晶場変化について検討した。
  アントラセン骨格を導入したユウロピウム配位高分子の単結晶を作成した。X線構造解析の結果、この配位高分子ユニットは反転中心対称をもたない八配位スクエア・アンチプリズム構造を有していることがわかった。この結晶を力学的な刺激を与えて粉砕した。粉砕後の試料についてESI-MS測定を行ったところ、アントラセン酸化体に由来する信号が観測された。これより、力学的な刺激によってアントラセンの酸化反応が進行したことが示唆された。光照射した試料についても酸化体の生成がESI-MS測定により確認された。反応前試料の発光スペクトルにおいてアントラセンに由来するブロードな発光帯が観測された。粉砕後の試料では、ユウロピウム由来のシャープな発光帯(610nm付近)が観測された。これは、酸化によってアントラセン配位子の励起エネルギー準位がユウロピウムの発光準位より高くなるためと考えられる。また、ユウロピウムの発光スペクトル形状が粉砕試料と光照射試料で異なっており、ユウロピウムイオンに働く結晶場に違いが生じていることが分かった。それぞれの発光寿命も異なっており、力学的な刺激と光励起で異なった生成物が生じていることが明らかとなった。
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Hokkaido University, Principal investigator, 19H04556
• Preparation and photo-functional properties of lanthanide coordination nanoparticles
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
  Apr. 2018 - Mar. 2021
  HASEGAWA Yasuchika
  In this study, preparations and three-dimensional structural control of luminescent lanthanide coordination nanoparticles have been demonstrated for creation of new molecular materials. Mono-nuclear lanthanide complexes were attached using surface-modified linker ligands on the nanoparticles. Eu(III) complexes fixed on the CaS and SiO2 nanoparrticles show bright red-luminescence. Lanthanide coordination polymers were also fixed on the nanoparticles. The three-dimensional structural control of luminescent lanthanide coordination polymers successfully promoted increase of their emission quantum yields.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Coinvestigator, 18H02041
• 秘密保持のためタイトル非公開
  学術コンサルティング
  Feb. 2020 - May 2020
  北川裕一
  B社, Principal investigator
• 紫外光を赤色円偏光に変換するフィルムの開発
  ノースタレント補助金
  Aug. 2019 - Mar. 2020
  北川 裕一
  ノーステック財団, Principal investigator, Competitive research funding
• 酸素濃度をモニタリングできるEu錯体の開発
  若手フィージビリテ ィ・スタディ支援事業
  Jun. 2019 - Mar. 2020
  北川 裕一
  北海道大学, Principal investigator, Competitive research funding
• Synthesis and photophysical properties of supramolecules composed of lanthanide complexes
  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
  Apr. 2017 - Mar. 2019
  Kitagawa Yuichi
  Luminescent lanthanide complexes are organic-inorganic hybrid material composed of lanthanide ion and organic compounds, which have attracted considerable attention because of their emissions with high color purity. We produced results of luminescent Eu complexes with supramolecular-type interactions as follows. (1) We synthesized luminescent Eu complex with high brightness, high thermostability, and high solubility in an organic solvent.(2)We obtained design guideline for Eu complexes with excellent circularly polarized emission properties. (3)We constructed analysis method of 4f-5d transitions of lanthanide complexes.
  Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Hokkaido University, Principal investigator, 17K14467
• 強発光を示す希土類分子材料のナノサイズ化
  研究成果展開事業 マッチングプランナープログラム「企業ニーズ解決試験」
  Jun. 2016 - Mar. 2017
  北川 裕一
  国立研究開発法人 科学技術振興機構, Principal investigator, Competitive research funding
• 可視－近赤外領域の光を効率的に利用できる二酸化炭素還元光触媒系の構築
  特別研究員奨励費
  Apr. 2013 - Mar. 2015
  北川 裕一
  日本学術振興会, Principal investigator, Competitive research funding

• 希土類錯体、発光材料、液状組成物、及びフェナレノン化合物
  Patent right, 北川裕一; 岡田京平; 村井勇太; 田崎芹夏; 稲毛康太; 長谷川靖哉; ワ; ンメンフィ
  特願PCT/JP2026/027467, 29 Jul. 2026
• 円偏光発光を示す発光体を含む組成物
  Patent right, 北川裕一; 小泉薫; 滝沢諒平
  特願PCT/JP2026/018797, 19 May 2026
• 希土類錯体
  Patent right, 北川裕一; 内藤亜侑; 長谷川靖哉; 伏見公志
  特願17/788530, 23 Dec. 2020
  特許US12606738
• シンチレータ材料、放射線検出装置及びハンドフットクロスモニタ
  Patent right, 北川 裕一; 稲毛 康太; 森下 祐樹; 菅野 満里奈
  特願2026-42255, 16 Mar. 2026
• 希土類錯体並びにこれを含む成形材料、成形品及びインク
  Patent right, 北川裕一; 小泉薫; ワンメンフィ; 長谷川靖哉
  特願PCT/JP2026/009472, 11 Mar. 2026
• 希土類錯体、発光材料、発光体、発光デバイス、合わせガラス用中間膜、合わせガラス、車両用フロントガラス、波長変換材料及びセキュリティ材料
  Patent right, 北川裕一; 熊谷まりな; 長谷川靖哉; 中西貴之; 伏見公志
  特願19835116.5
  特許(EP)3822277
• 希土類錯体、発光材料、液状組成物、及びフェナレノン化合物
  Patent right, 北川裕一; 岡田京平; 村井勇太; 田﨑芹夏; 稲毛康太; 長谷川靖哉; ワンメンフィ
  特願2025-128766, 31 Jul. 2025
• 円偏光発光を示す発光体を含む組成物
  Patent right, 北川裕一; 滝沢諒平
  特願2025-105687, 23 Jun. 2025
• 希土類錯体
  Patent right, 北川裕一; 内藤亜侑; 長谷川靖哉; 伏見公志, 北海道大学
  特願2019-234712, 26 Dec. 2019
  特許第7688398号
• RARE-EARTH COMPLEX, LIGHT-EMITTING MATERIAL, LIGHT-EMITTING OBJECT, LIGHT-EMITTING DEVICE, INTERLAYER FOR LAMINATED GLASS, LAMINATED GLASS, WINDSHIELD FOR VEHICLE, WAVELENGTH CONVERSION MATERIAL, AND SECURITY MATERIAL
  Patent right, Yuichi Kitagawa; Marina Kumagai; Yasuchika Hasegawa; Takayuki Nakanishi; Koji Fushimi
  特願17/258320, 04 Jul. 2019
  特許U.S.12312369
  Yuichi Kitagawa, Marina Kumagai, Yasuchika Hasegawa, Takayuki Nakanishi, Koji Fushimi
• 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、発光性シート、及び農業用ビニー ルハウス
  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12291545, 23 Apr. 2020
  特許U.S.12291545
  北川裕一, 島かおり, 和田智志, 長谷川靖哉, 伏見公志
• 希土類錯体並びにこれを含む成形材料、成形品及びインク
  Patent right, 北川裕一; 小泉薫; 長谷川靖哉; ワンメンフィ
  特願2025-038328, 11 Mar. 2025
• 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、発光性シート、及び農業用ビニールハウス
  Patent right, 北川裕一; 島かおり; 和田智志; 長谷川靖哉; 伏見公志, 北海道大学
  特願2019-085626, 26 Apr. 2019
  特許第7621652号
• セリウム錯体、発光性固体、樹脂成形体、及びシンチレーター材料
  Patent right, 北川 裕一; 富川 虎乃輔; 稲毛 康太; 森下 祐樹, 国立大学法人北海道大学; 国立研究開発法人日本原子力研究開発機構
  特願2024-134914, 13 Aug. 2024
• 発光材料、塗料、印刷物、及び樹脂成形体
  Patent right, 北川裕一; 田﨑芹夏; 中井拓真; 長谷川靖哉; 王夢菲
  特願2024-059143, 01 Apr. 2024
• Rare-Earth Complex, Light-Emitting Material, Light-Emitting Object, Light-Emitting Device, Interlayer for Laminated Glass, Laminated Glass, Windshield for Vehicle, Wavelength Conversion Material, and Security Material
  Patent right, 北川裕一; 熊谷まりな; 中西貴之; 伏見公志; 長谷川靖哉
  特願ZL201980045748.4, 04 Jul. 2019
  特許201980045748.4
• Rare Earth Complex, Rare Earth Complex Solution, Luminescent Molded Article, Method for Producing Luminescent Product, Luminescent Sheet, and Vinyl Greenhouse for Agriculture
  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202080031047.8, 23 Apr. 2020
  特許ZL202080031047.8
• 希土類錯体、発光材料、発光体、発光デバイス、合わせガラス用中間膜、合わせガラス、車両用フロントガラス、波長変換材料及びセキュリティ材料
  Patent right, 北川裕一; 熊谷まりな; 中西貴之; 伏見公志; 長谷川靖哉
  特願2018-130925, 05 Jul. 2018
  特許7317376号
• 円偏光発光性希土類錯体
  Patent right, 北川裕一; 和田智志; 伏見公志; 長谷川靖哉, 北海道大学
  特願2019-12904, 29 Jan. 2019
  特開2020-121928, 13 Aug. 2020
  特許7269621号
• Rare earth complex and light emitting element
  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16/488.784, 27 Feb. 2018
  特許11,499,033(USA)
• Rare earth complex and light emitting element
  Patent right, 北川裕一; 鈴江郁哉; 中西貴之; 伏見公志; 長谷川靖哉, 国立大学法人北海道大学
  特願201880013290.3, 22 Feb. 2018
  特許ZL201880013290.3(中国)
• 希土類錯体及び発光素子
  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2019-501414, 22 Feb. 2018
  WO2018/155557, 30 Aug. 2016
  特許第7063484号
• 新規Ce系青色発光材料
  Patent right, 北川裕一; 富川虎乃輔; 庄司淳; 長谷川靖哉; 伏見公志; 赤間知子; 小林正人; 武次徹也, 国立大学法人北海道大学
  特願2022-035630, 08 Mar. 2022
• がん細胞の診断/治療が同時に可能なポルフィリン配位子錯体
  Patent right, 庄司 淳; 細谷祥太; 長谷川靖哉; 北川裕一; 伏見公志
  特願2022-035633, 08 Mar. 2022
• 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, 国立大学法人北海道大学
  特願2022-033536, 04 Mar. 2022
• アモルファス希土類配位高分子
  Patent right, 長谷川靖哉; 林譲; 北川裕一; 庄司淳; 伏見公志
  特願2021-074135, 26 Apr. 2021
• 希土類錯体、発光材料及びその製造方法、並びに発光シート及びその製造方法
  Patent right, 中西 貴之; 岡井 翼; 長谷川 靖哉; 北川 裕一; 伏見 公志, 国立大学法人北海道大学
  特願2017-504981, 26 Feb. 2016
  WO2016-143562, 15 Sep. 2016
  特許6799761
  201803011575529728
• 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, 国立大学法人北海道大学, スタンレー電気株式会社, 公立大学法人大阪府立大学
  特願2016-170553, 01 Sep. 2016
  特開2018-035101, 08 Mar. 2018
  特許6749816
  201803016503747528
• 高分子錯体及びその製造方法
  Patent right, 長谷川 靖哉; 中島 綾子; 中西 貴之; 北川 裕一; 伏見 公志, 国立大学法人北海道大学
  特願JP2016055906, 26 Feb. 2016
  特開WO2016-143561, 15 Sep. 2016
  特許6666009
  201803003233279255
• 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, 国立大学法人北海道大学, 日亜化学工業株式会社
  特願2015-003282, 09 Jan. 2015
  特開2016-128392, 14 Jul. 2016
  特許6643804
  201603020123777915
• 希土類錯体ポリマー及び発光体
  Patent right, 中西 貴之; 長谷川 靖哉; 北川 裕一; 伏見 公志; 沢登 拓矢; 松田 賢司, 国立大学法人北海道大学, 学校法人東京理科大学
  特願2018-011508, 26 Jan. 2018
  特開2019-127560, 01 Aug. 2019
  201903005458146211
• 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, 北海道大学
  特願2019-132858, 18 Jul. 2019
• 希土類ナノ粒子、及びその製造方法
  Patent right, 長谷川 靖哉; 小出 克将; 中西 貴之; 北川 裕一; 伏見 公志; 日夏 幸雄; 土井 貴弘; 金子 明仁; 井上 裕樹, 株式会社三徳, 国立大学法人北海道大学
  特願2017-167293, 31 Aug. 2017
  特開2019-043870, 22 Mar. 2019
  201903001505284827
• 希土類化合物、ホスフィンオキシド化合物及び発光体
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