Researcher Database

Yuta Takano
Research Institute for Electronic Science Material and Molecular Sciences
Associate Professor

Researcher Profile and Settings


  • Research Institute for Electronic Science Material and Molecular Sciences

Job Title

  • Associate Professor

J-Global ID

Research Interests

  • photoinduced electron transfer   perovskite nanocrystals   Carbon nanohorns   carbon nanotubes   semiconductor quantum dots   fullerenes (endohedral)   phototherapy   photophysical chemistry   photofunctional molecules   

Research Areas

  • Nanotechnology/Materials / Nanomaterials
  • Life sciences / Bioorganic chemistry
  • Nanotechnology/Materials / Structural/physical organic chemistry
  • Nanotechnology/Materials / Functional solid-state chemistry
  • Nanotechnology/Materials / Biochemistry

Academic & Professional Experience

  • 2017/04 - Today Hokkaido University Research Institute for Electronic Science Assoc. Prof.
  • 2011/10 - 2017/03 Kyoto University Institute for Integrated Cell-Material Sciences (WPI-iCeMS) Program-Specific Research Center Assistant Professor
  • 2010/04 - 2011/09 University of Tsukuba Life Science Center of Tsukuba Advanced Research Alliance Postdoctoral fellow


  • 2005/04 - 2010/03  Univeristy of Tsukuba  Department of Pure and Applied Science
  • 2007/09 - 2008/08  (Exchange student) Complutense University of Madrid  Faculty of chemistry

Association Memberships

  • フラーレン・ナノチューブ・グラフェン学会   JAPANESE SOCIETY FOR CHEMICAL BIOLOGY   The American Chemical Society   THE CHEMICAL SOCIETY OF JAPAN   

Research Activities

Published Papers

  • Yukari Maeda, Eri Hirata, Yuta Takano, Norihito Sakaguchi, Natsumi Ushijima, Ayumi Saeki, Sadahito Kimura, Ken-ichiro Shibata, Masako Yudasaka, Atsuro Yokoyama
    CARBON 166 36 - 45 0008-6223 2020/09 [Refereed][Not invited]
  • Devika Sasikumar, Yuta Takano, Vasudevanpillai Biju
    Chemistry – A European Journal 2020/02/11 [Refereed][Not invited]
  • Sankaramangalam Balachandran Bhagyalakshmi, Sushant Ghimire, Kiyonari Takahashi, Ken-ichi Yuyama, Yuta Takano, Takayoshi Nakamura, Vasudevanpillai Biju
    CHEMISTRY-A EUROPEAN JOURNAL 26 (10) 2133 - 2137 0947-6539 2020/02 [Refereed][Not invited]
    Repeated absorption of emitted photons, also called photon recycling, in large crystals and thick films of perovskites leads to delayed photoluminescence (PL) and decrease of PL intensity. The role of distinct band gaps, which act as donors and acceptors of energy, and nonradiative energy transfer on such delayed, low intensity emission is yet to be rationalized. Here we report delayed emission by nonradiative energy transfer across a distribution of energy states in close-packed crystallites of cesium lead bromide CsPbBr3, formamidinium lead bromide FAPbBr(3), or the mixed halide FAPb(BrI)(3) perovskite synthesized in the form of thick pellets by the piezochemical method. The PL lifetime of the bromide-rich domain in the mixed halide pellet is considerably decreased when compared with a pure FAPbBr(3) pellet. Here the domains with higher bromide composition act as the energy donor, whereas the iodide-rich domains are the acceptors. Time-resolved PL measurements of CsPbBr3, FAPbBr(3), and the mixed halide FAPb(BrI)(3) perovskite pellets help us to clarify the role of nonradiative energy transfer on photon recycling.
  • Yuta Takano, Kazuaki Miyake, Jeladhara Sobhanan, Vasudevanpillai Biju, Nikolai V. Tkachenko, Hiroshi Imahori
    Chemical Communications 2020 [Refereed][Not invited]
  • Jeladhara Sobhanan, Philip Jones, Reiko Kohara, Sakiko Sugino, Martin Vacha, Challapally Subrahmanyam, Yuta Takano, Fred Lacy, Vasudevanpillai Biju
    Nanoscale 2020 [Refereed][Not invited]
  • Yuma Yamada, Yuta Takano, Satrialdi, Jiro Abe, Mitsue Hibino, Hideyoshi Harashima
    BIOMOLECULES 10 (1) 2020/01 [Refereed][Not invited]
    There have been many reports on the relationship between mitochondrial oxidative stress and various types of diseases. This review covers mitochondrial targeting photodynamic therapy and photothermal therapy as a therapeutic strategy for inducing mitochondrial oxidative stress. We also discuss other mitochondrial targeting phototherapeutic methods. In addition, we discuss anti-oxidant therapy by a mitochondrial drug delivery system (DDS) as a therapeutic strategy for suppressing oxidative stress. We also describe cell therapy for reducing oxidative stress in mitochondria. Finally, we discuss the possibilities and problems associated with clinical applications of mitochondrial DDS to regulate mitochondrial oxidative stress.
  • Satrialdi, Reina Munechika, Vasudevanpillai Biju, Yuta Takano, Hideyoshi Harashima, Yuma Yamada
    Chemical Communications 56 (7) 1145 - 1148 2020 [Refereed][Not invited]
    The uncontrolled production of reactive oxygen species during photodynamic therapy (PDT) induces oxidative stress. The full potential of PDT is accomplished by delivery of a pi-extended porphyrin-type photosensitizer into mitochondria of tumor cells using a MITO-Porter, a mitochondrial targeting nanodevice. This strategy can be implemented for innovative cancer therapy.
  • Tomokazu Umeyama, Takuma Hanaoka, Hiroki Yamada, Yuki Namura, Satoshi Mizuno, Tomoya Ohara, Jinseok Baek, JaeHong Park, Yuta Takano, Kati Stranius, Nikolai V. Tkachenko, Hiroshi Imahori
    Chemical Science Royal Society of Chemistry ({RSC}) 10 (27) 6642 - 6650 2019/06 [Refereed][Not invited]
  • Sushant Ghimire, Kiyonori Takahashi, Yuta Takano, Takayoshi Nakamura, Vasudevanpillai Biju
    Journal of Physical Chemistry C 123 (45) 27752 - 27758 2019 [Refereed][Not invited]
  • Sushant Ghimire, Lata Chouhan, Yuta Takano, Kiyonori Takahashi, Takayoshi Nakamura, Ken-ichi Yuyama, Vasudevanpillai Biju
    ACS Energy Letters American Chemical Society ({ACS}) 4 (1) 133 - 141 2019/01 [Refereed][Not invited]
  • Devika Sasikumar, Reiko Kohara, Yuta Takano, Ken-ichi Yuyama, Vasudevanpillai Biju
    Journal of Chemical Science 131 (5) 2019/01 [Refereed][Not invited]
  • Elizabeth Mariam Thomas, Sushant Ghimire, Reiko Kohara, Ajith Nair Anil, Ken-ichi Yuyama, Yuta Takano, K George Thomas, Vasudevan Pillai Biju
    ACS Nano American Chemical Society ({ACS}) 12 (9) 9060 - 9069 2018/08 [Refereed][Not invited]
  • Anisotropic magnetic properties of an endohedral metallofullerene for molecular location sensing
    Yuta Takano, Ryo Tashita, Mitsuaki Suzuki, Hiroshi Imahori, Takeshi Akasaka
  • Sushant Ghimire, Anjaly Sivadas, Ken-ichi Yuyama, Yuta Takano, Raju Francis, Vasudevanpillai Biju
    Nanoscale Royal Society of Chemistry ({RSC}) 10 13368 - 13374 2018/04 [Refereed][Not invited]
  • Yuta Takano, Erina Hanai, Hiroshi Imahori
    NANOSCALE 9 (45) 17909 - 17913 2040-3364 2017/12 [Refereed][Not invited]
    Donor-acceptor-linked molecules have been synthesized and utilized to induce the rapid and site-selective lipid-oxidation in mitochondria by utilizing a photoinduced intermolecular electron transfer reaction. Two water-soluble donor-acceptor molecules (1 and 2) were designed and synthesized for this purpose. 2 was prepared to modulate its affinity to cell membrane in mitochondria. Confocal laser microscopy experiments revealed that 1 and 2 possess high localization abilities in mitochondria. By the photoinduced electron transfer, 2 exhibited the remarkable oxidation ability of lipids, mainly cardiolipin. In HeLa cells, 2 triggered mitochondrial lipid oxidation, which was followed by apoptotic cell death, under illumination within a few seconds. These results show that the present molecular system is highly promising to utilize the photoinduced intermolecular electron transfer reaction in a precise spatiotemporal manner in a cell by using light.
  • Yuta Takano, Reina Munechika, Vasudevanpillai Biju, Hideyoshi Harashima, Hiroshi Imahori, Yuma Yamada
    NANOSCALE Royal Society of Chemistry ({RSC}) 9 (47) 18690 - 18698 2040-3364 2017/12 [Refereed][Not invited]
    It has been known for decades that intracellular redox reactions control various vital functions in living systems, which include the synthesis of biomolecules, the modulation of protein functions, and cell signaling. Although there have been several reports on the control of such functions using DNA and RNA, the non-invasive optical control of biological functions is an important ongoing challenge. In this study, a hybrid of an electron donor-acceptor linked molecule based on a ferrocene(Fc)-porphyrin(ZnP)-fullerene-(C-60) analogue and an elaborately designed nano-carrier, referred to herein as a MITO-Porter, resulted in a successful photoinduced intermolecular electron transfer reaction via the long-lived intramolecular charge separation, leading to site-specific reductive reactions in the mitochondria of living HeLa cells. A Fc-ZnP-C-60 linked molecule, 1-Oct, was designed and prepared for taking advantage of the unique photophysical properties with excellent efficiency (i.e. a long lifetime and a high quantum yield) for photoinduced charge separation. The targeted delivery of 1-Oct to mitochondria was accomplished by using a combination of the Fc-ZnP-C-60 molecule and a drug delivery nano-carrier, MITO-Porter, that was recently established by our group for intracellular cargo delivery. The successful delivery of 1-Oct by the MITO-Porter permitted the optically-controlled generation of O-2(-) in the mitochondria of HeLa cells and the following induction of apoptosis as a cell signalling response was observed in confocal laser microscopy experiments. The obtained results indicate the use of an electron donor-acceptor system such as this can be a promising tool for the non-invasive triggering of redox-coupled cellular activities in living systems.
  • Ning Cai, Yuta Takano, Tomohiro Numata, Ryuji Inoue, Yasuo Mori, Tatsuya Murakami, Hiroshi Imahori
    JOURNAL OF PHYSICAL CHEMISTRY C 121 (32) 17457 - 17465 1932-7447 2017/08 [Refereed][Not invited]
    A series of ferrocene-porphyrin-fullerene linked triads (TC1, TC2, and TC4) possessing different numbers of cationic moieties were designed and prepared to achieve a high photoinduced charge-separation (CS) yield in a biological environment. In a solution, TC1, TC2, and TC4 demonstrated the formation of their nanoaggregates. Among the new triads, TC4 possessing the four cationic moieties exhibited the formation of a long-lived charge-separated state with the highest CS yield (86%) ever reported in cell membrane-like lipid bilayers, which is consistent with the largest change in the cell membrane potential of PC12 cells via the photoinduced CS under green light illumination. The highest CS yield in the biological environment can be rationalized by the well-tailored balance in hydrophobicity and hydrophilicity of TC4. This finding provides a strategy to improve greatly the photoinduced charge-separation yield of donor-acceptor linked molecules in the biological environment and also will be informative for extracting the full potential of the photoinduced charge-separated state toward biological applications.
  • Mitsuaki Suzuki, Michio Yamada, Yutaka Maeda, Satoru Sato, Yuta Takano, Filip Uhlik, Zdenek Slanina, Yongfu Lian, Xing Lu, Shigeru Nagase, Marilyn M. Olmstead, Alan L. Balch, Takeshi Akasaka
    CHEMISTRY-A EUROPEAN JOURNAL 22 (50) 18115 - 18122 0947-6539 2016/12 [Refereed][Not invited]
    We report that Ce@C-2v(9)-C-82 forms a centrosymmetric dimer when co-crystallized with Ni(OEP) (OEP = octaethylporphyrin dianion). The crystal structure of {Ce@C-2v(9)-C-82}(2)center dot 2[Ni(OEP)]center dot 4C(6)H(6) shows that a new C-C bond with a bond length of 1.605(5) angstrom connects the two cages. The high spin density of the singly occupied molecular orbital (SOMO) on the cage and the pyramidalization of the cage are factors that favor dimerization. In contrast, the treatment of Ni(OEP) with M@C-2v(9)-C-82 (M = La, Sc, and Y) results in crystallization of monomeric endohedral fullerenes. A systematic comparison of the X-ray structures of M@C-2v(9)-C-82 (M = Sc, Y, La, Ce, Gd, Yb, and Sm) reveals that the major metal site in each case is located at an off-center position adjacent to a hexagonal ring along the C-2 axis of the C-2v(9)-C-82 cage. DFT calculations at the M06-2X level revealed that the positions of the metal centers in these metallofullerenes M@C-2v(9)-C-82 (M = Sc, Y, and Ce), as determined by single-crystal X-ray structure studies, correspond to an energy minimum for each compound.
  • Yuta Takano, Ryo Tashita, Mitsuaki Suzuki, Shigeru Nagase, Hiroshi Imahori, Takeshi Akasaka
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138 (25) 8000 - 8006 0002-7863 2016/06 [Refereed][Not invited]
    Location recognition at the molecular scale provides valuable information about the nature of functional molecular materials. This study presents a novel location sensing approach based on an endohedral metallofullerene, Ce@C-82, using its anisotropic magnetic properties, which lead to temperature-dependent paramagnetic shifts in H-1 NMR spectra. Five site-isomers of Ce@C82CH2-3,5-C6H3Me2 were synthesized to demonstrate the spatial sensing ability of Ce@C-82. Single-crystal structures, absorption spectra, and density functional theory calculations were used to select the plausible addition positions in the radical coupling reaction, which preferentially happens on the carbon atoms with high electron density of the singly occupied molecular orbital (SOMO) and positive charge. Temperature dependent NMR measurements demonstrated unique paramagnetic shifts of the H-1 peaks, which were derived from the anisotropic magnetism of the f-electron in the Ce atom of the isomers. It was found that the magnetic anisotropy axes can be easily predicted by theoretical calculations using the Gaussian 09 package. Further analysis revealed that the temperature-dependent trend in the shifts is clearly predictable from the distance and relative position of the proton from the Ce atom. Hence, the Ce-encapsulated metallofullerene Ce@C-82 can provide spatial location information about nearby atoms through the temperature-dependent paramagnetic shifts of its NMR signals. It can act as a molecular probe for location sensing by utilizing the anisotropic magnetism of the encapsulated Ce atom. The potentially low toxicity and stability of the endohedral fullerene would make Ce@C-82 suitable for applications in biology and material science.
  • Yuta Takano, Tomohiro Numata, Kazuto Fujishima, Kazuaki Miyake, Kazuya Nakao, Wesley David Grove, Ryuji Inoue, Mineko Kengaku, Shigeyoshi Sakaki, Yasuo Mori, Tatsuya Murakami, Hiroshi Imahori
    CHEMICAL SCIENCE 7 (5) 3331 - 3337 2041-6520 2016 [Refereed][Not invited]
    A series of porphyrin-fullerene linked molecules has been synthesized to evaluate the effects of substituents and molecular structures on their charge-separation yield and the lifetime of a final charge-separated state in various hydrophilic environments. The selected high-performance molecule effectively achieved depolarization in a plasma cell membrane by visible light as well as two-photon excitation using a near-infrared light laser. Moreover, it was revealed that the depolarization can trigger neuronal firing in rat hippocampal neurons, demonstrating the potential and versatility for controlling cell functions using light.
  • Michio Yamada, Satoru Sato, Yuta Takano, Lai Feng, Shigeru Nagase, Takeshi Akasaka
    Chemical Science of Electron Systems 133 - 153 2015/01/01 [Refereed][Not invited]
    Endohedral metallofullerenes (EMFs) are hybrids of fullerenes and metal atoms or metal-containing clusters. The curved π-electron systems of the fullerene cages in EMFs are influenced strongly by the encaged metal species. The π-electron systems of EMFs, which stem from the electron transfer from the encaged metallic species, differ entirely from those of empty fullerenes. Accordingly, EMFs exhibit unique chemical reactivities and electronic properties that empty fullerenes never have. This chapter exclusively addresses the most recent achievements of our EMF research, ranging from basic chemical reactivity to material performance. This chapter includes four major parts. The first deals with the fascinating chemical reactivity of EMFs encountered very recently in our lab. The second part is devoted to EMF-based donor–acceptor conjugates, in which EMFs can display electron acceptor characters as well as electron donor characters, corresponding to the counterparts. In the third part, carrier transport properties of EMFs are summarized. The fourth part briefly describes the preparation and property of surface-grafted EMFs. Throughout, we hope that this chapter will stimulate readers to familiarize themselves with these fascinating molecules.
  • Yuta Takano, Zdenek Slanina, Jaime Mateos, Takayoshi Tsuchiya, Hirold Kurihara, Filip Uhlik, Maria Angeles Herranz, Nazario Martin, Shigeru Nagase, Takeshi Akasaka
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 136 (50) 17537 - 17546 0002-7863 2014/12 [Refereed][Not invited]
    Synthesizing unprecedented diamagnetic adducts of an endohedral metallofullerene was achieved by using 1,3-dipolar cycloaddition reaction of paramagnetic La@C-5-C-82 with a simultaneous hydrogen addition. The selective formation of two main products, La@C-5-C82HCMe2NMeCHPh (2a and 2b), was first detected by HPLC analysis and MALDI-TOF mass spectrometry. 2a and 2b-O, which was readily formed by the oxidation of 2b, were isolated by multistep HPLC separation and were fully characterized by spectroscopic methods, including 1D and 2D-NMR, UVvis-NIR measurements and electrochemistry. The hydrogen atom was found to be connected to the fullerene cage directly in the case of 2a, and the redox behavior indicated that the CH bond can still be readily oxidized. The reaction mechanism and the molecular structures of 2a and 2b were reasonably proposed by the interplay between experimental observations and DFT calculations. The feasible order of the reaction process would involve a 1,3-dipolar cycloaddition followed by the hydrogen addition through a radical pathway. It is concluded that the characteristic electronic properties and molecular structure of La@C-5-C-82 resulted in a site-selective reaction, which afforded a unique chemical derivative of an endohedral metallofullerene in high yields. Derivative 2a constitutes the first endohedral metallofullerene where the direct linking of a hydrogen atom has been structurally proven.
  • Yuta Takano, Yuki Nagashima, M. Angeles Herranz, Nazario Martin, Takeshi Akasaka
    BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY 10 714 - 721 1860-5397 2014/03 [Refereed][Not invited]
    The [4 + 2] cycloaddition of o-quinodimethanes, generated in situ from the sultine 4,5-benzo-3,6-dihydro-1,2-oxathiin 2-oxide and its derivative, to La metal-encapsulated fullerenes, La-2@C-80 or La@C-82, afforded the novel derivatives of endohedral metallofullerenes (3a,b, 4a,b and 5b). Molecular structures of the resulting compounds were elucidated using spectroscopic methods such as MALDI-TOF mass, optical absorption, and NMR spectroscopy. The [4 + 2] adducts of La-2@C-80 (3a,b, and 4a,b) and La@C-82 (5b), respectively, retain diamagnetic and paramagnetic properties, as confirmed by EPR spectroscopy. Dynamic NMR measurements of 4a at various temperatures demonstrated the boat-to-boat inversions of the addend. In addition, 5b revealed remarkable thermal stability in comparison with the reported [4 + 2] cycloadduct of pentamethylcyclopentadiene and La@C-82 (6). These findings demonstrate the utility of sultines to afford thermodynamically stable endohedral metallofullerene derivatives for the use in material science.
  • Yuta Takano
    FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES 22 (1-3) 243 - 249 1536-383X 2014/01 [Refereed][Not invited]
    Chemical syntheses and intramolecular electron transferring behaviors in the electron donor/acceptor conjugates based on endohedral metallofullerenes, La-2@C-80 and La@C-82, are overviewed. A study on the photo-induced excited states of a La-2@C-80 derivative connected with an electron donor revealed the formation of a distinct radical ion pair state. A La@C-82 derivative linked with an electron donor demonstrated an unprecedented ion/anion pair state, and La-2@C-80 tethered with an acceptor showed a fullerene donor system, in which the fullerene acts as an electron donor. Using endohedral lanthanide metallofullerenes for intramolecular electron transferring systems opens a new door for developing novel molecular materials.
  • Masanori Yamamoto, Yuta Takano, Yoshihiro Matano, Kati Stranius, Nikolai V. Tkachenko, Helge Lemmetyinen, Hiroshi Imahori
    JOURNAL OF PHYSICAL CHEMISTRY C 118 (4) 1808 - 1820 1932-7447 2014/01 [Refereed][Not invited]
    Diazaporphyrin-C-60 linked dyad has been prepared to assess intrinsic electron transfer properties of diazaporphyrins for the first time. The dyad exhibited the efficient formation of a charge-separated state which has a lifetime 4x longer than that of the corresponding porphyrin-C-60 linked dyad with the same spacer. In accordance with this elongation, a SnO2 nanostructured electrode modified with the diazaporphyrin-C-60 dyad also revealed enhanced photocurrent generation in the visible region in comparison with that with the porphyrin-C-60 dyad. These results show that diazaporphyrins are highly promising building blocks for the construction of artificial photosynthesis and solar energy conversion.
  • Christina Schubert, Marc Rudolf, Dirk M. Guldi, Yuta Takano, Naomi Mizorogi, M. Ángeles Herranz, Nazario Martín, Shigeru Nagase, Takeshi Akasaka
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 371 (1998) 1364-503X 2013/09/13 [Refereed][Not invited]
    In this paper, we report on the design, redox potentials, excited state energies and radical ion pair state energies in electron donor-acceptor conjugates comprising the electron-donating π-extended tetrathiafulvalene and several electron-accepting fullerenes. To this end, we contrast an empty fullerene, that is, C60, with two endohedral metallofullerenes, that is, open-shell La@C82 and closed-shell La2@C80, in terms of charge separation and charge recombination dynamics. © 2013 The Author(s) Published by the Royal Society. All rights reserved.
  • Takeshi Akasaka, Takahiro Tsuchiya, Lai Feng, Yuta Takano, Shigeru Nagase
    PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS 188 (4) 317 - 321 1042-6507 2013/04 [Refereed][Not invited]
    Introducing organosulfur moieties into EMFs is a successful approach for the elucidation of electron transfer behavior of EMFs because the introduced sulfur atoms promote active redox properties in the fullerene molecules. Complexation of La@C-82 and unsaturated thiacrown ether, for instance, shows remarkable host-guest interaction and electron transfer to the fullerene. In contrast to these intermolecular electron-accepting properties of EMFs, intramolecular properties were revealed through studies of covalently bonded La-2@C-80 or La@C-82 and -extended tetrathiafulvalene (exTTF) dyads. These first milestones on the electron transfer behavior have inspired us to ascertain and then expand our knowledge of the unique characteristics of EMFs. These findings suggest potential applications of EMFs based on their unique molecular structure and electronic and magnetic properties as novel carbon nanomaterials.
  • Nuria Crivillers, Yuta Takano, Yuya Matsumoto, Javier Casado-Montenegro, Marta Mas-Torrent, Concepcio Rovira, Takeshi Akasaka, Jaume Veciana
    CHEMICAL COMMUNICATIONS 49 (74) 8145 - 8147 1359-7345 2013 [Refereed][Not invited]
    A novel endohedral metallofullerene (EMF) has been designed and synthesised for its grafting on gold. The functionalization of the substrate resulted in a multifunctional surface displaying the properties of the EMF in solution.
  • Yuta Takano, Christina Schubert, Naomi Mizorogi, Lai Feng, Azusa Iwano, Mikimasa Katayama, M. Angeles Herranz, Dirk M. Guldi, Nazario Martin, Shigeru Nagase, Takeshi Akasaka
    CHEMICAL SCIENCE 4 (8) 3166 - 3171 2041-6520 2013 [Refereed][Not invited]
    Intramolecular and intermolecular electronic interactions are important concepts for fabricating fullerene-based nanostructures such as bulk heterojunction (BHJ) solar cells and supramolecular assemblies. To ascertain differences of the molecular interactions depending on the electronic characteristics of the fullerene adducts, we have synthesized and investigated the [5,6]-open and [6,6]-closed adducts of C-60, which are covalently linked to pi-extended tetrathiafulvalene (exTTF) by a flexible sigma-bond chain. The two adducts were synthesized by means of cycloaddition reactions and were characterized using spectroscopic methods such as MALDI-TOF mass spectrometry and NMR spectroscopy. Electronic properties of the [5,6]-open and [6,6]-closed adducts were investigated in the ground and excited states using steady-state absorption spectroscopy, cyclic and differential pulse voltammetry (CV and DPV), fluorescence spectroscopy, and femtosecond time-resolved absorption spectroscopy. DFT calculations of the two adducts predict that the flexible bridge between C-60 and exTTF enables a closer proximity than the interlayer distance of graphite (3.35 angstrom), which dictates considerable pi-pi interactions. In comparing the [5,6]- and [6,6]-adducts, it is noteworthy to mention that the [6,6]-adduct revealed longer lifetimes of the photochemically formed radical ion pair states than that of the [5,6]-adduct, which is in contrast to results of recent investigations related to the photodynamics of [5,6]- and [6,6]-adducts of C-60. Titration experiments using references, namely [5,6]- and [6,6]-PC61BM, inferred that the [6,6]-adduct gives rise to stronger electronic interactions with exTTF than the [5,6]-adduct. Comprehensive understanding of the different molecular properties, which the [5,6]- and [6,6]-adducts exhibit, provides valuable information regarding the morphology and/or the electronic properties of C-60-based nanocomposites, such as C-60-based BHJ solar cells or supramolecular assemblies.
  • Yuta Takano, Shota Obuchi, Naomi Mizorogi, Raul Garcia, M. Angeles Herranz, Marc Rudolf, Dirk M. Guldi, Nazario Martin, Shigeru Nagase, Takeshi Akasaka
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 134 (47) 19401 - 19408 0002-7863 2012/11 [Refereed][Not invited]
    An endohedral metallofullerene, La-2@C-80, is covalently linked to the strong electron acceptor 11,11,12,12-tetracyano-9,10-antha-p- quinodimethane (TCAQ) by means of the Prato reaction, affording two different [5,6]-metallofulleropyrrolidines namely 1a and 2a, 1a and 2a were isolated and fully characterized by means of MALDI-TOF mass, UV-Vis-NIR absorption and NMR spectroscopies. In addition, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) corroborated the unique redox character of 2a, that is the presence of the electron donating La-2@C-80 and the electron accepting TCAQ, Although a weak electronic coupling 'dictates the interactions between La-2@C-80 and TCAQ in the ground state, time resolved transient absorption experiments reveal that in the excited (i.e., pi-pi* centered at La-2@C-80) the unprecedented formation of the (La-2@C-80)(center dot+)-(TCAQ)(center dot-) radical ion pair state eevolves in nonpolar and polar media with a quantum efficiency of 33%.
  • Yuta Takano, Shota Obuchi, Naomi Mizorogi, Raul Garcia, M. Angeles Herranz, Marc Rudolf, Silke Wolfrum, Dirk M. Guldi, Nazario Martin, Shigeru Nagase, Takeshi Akasaka
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 134 (39) 16103 - 16106 0002-7863 2012/10 [Refereed][Not invited]
    Electron donor-acceptor conjugates of paramagnetic endohedral metallofullerenes and pi-extended tetrathiafulvalene (exTTF) were synthesized, characterized, and probed with respect to intramolecular electron transfer involving paramagnetic fullerenes. UV-vis-NIR absorption spectroscopy complemented by electrochemical measurements attested to weak electronic interactions between the electron donor, exTTF, and the electron acceptor, La@C-82, in the ground state. In the excited state, photoexcitation powers a fast intramolecular electron transfer to yield an ion and radical ion pair state consisting of one-electron-reduced La@C82 and of one-electron-oxidized exTTF.
  • Tomohiro Numata, Tatsuya Murakami, Fumiaki Kawashima, Nobuhiro Morone, John E. Heuser, Yuta Takano, Kei Ohkubo, Shunichi Fukuzumi, Yasuo Mori, Hiroshi Imahori
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 134 (14) 6092 - 6095 0002-7863 2012/04 [Refereed][Not invited]
    The control of ion transport across cell membranes by light is an attractive strategy that allows targeted, fast control of precisely defined events in the biological membrane, Here we report a novel general strategy for the control of membrane potential and ion transport by using charge-separation molecules and light. Delivery of charge-separation molecules to the plasma membrane of PC12 cells by a membranous nanocarrier and subsequent light irradiation led to depolarization of the membrane potential as well as inhibition of the potassium ion flow across the membrane. Photoregulation of the cell membrane potential and ion transport by using charge-separation molecules is highly promising for control of cell functions.
  • Shinji Kitaura, Kei Kurotobi, Maki Sato, Yuta Takano, Tomokazu Umeyama, Hiroshi Imahori
    CHEMICAL COMMUNICATIONS 48 (68) 8550 - 8552 1359-7345 2012 [Refereed][Not invited]
    The effects of fullerene bisadduct regioisomers on solar cell performance have been examined for the first time and the two substituent positions on C-60 have been found to have a large impact on the solar cell performance.
  • Hiroshi Imahori, Tomokazu Umeyama, Kei Kurotobi, Yuta Takano
    CHEMICAL COMMUNICATIONS 48 (34) 4032 - 4045 1359-7345 2012 [Refereed][Not invited]
    Large pi-conjugated compounds are promising building blocks for organic thin-film electronics such as organic light-emitting diodes, organic field-effect transistors, and organic photovoltaics. Utilization of porphyrins and phthalocyanines for this purpose is highly fascinating because of their excellent electric, photophysical, and electrochemical properties as well as intense self-assembling abilities arising from pi-pi stacking interactions. This paper focuses on fundamental aspects of self-assembled structures that have been obtained from porphyrin and phthalocyanine building blocks and more complex composites for photoinduced charge separation and charge transport toward the potential applications to organic thin-film electronics.
  • Koji Sawai, Yuta Takano, Marta Izquierdo, Salvatore Filippone, Nazario Martin, Zdenek Slanina, Naomi Mizorogi, Markus Waelchli, Takahiro Tsuchiya, Takeshi Akasaka, Shigeru Nagase
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 133 (44) 17746 - 17752 0002-7863 2011/11 [Refereed][Not invited]
    Endohedral metallofullerenes are promising materials in biomedical and material sciences. In particular, they are of interest as agents for magnetic resonance imaging (MRI), photovoltaic devices, and semimetallic components. The synthesis of chiral endofullerenes represents one step further in the potential use of these carbon allotropes; however, this step has not been addressed so far. In this regard, enantiopure endofullerenes are expected to open new, avenues in fields in which chirality is a key issue Here, the synthesis and characterization of the first chiral endohedral metallofullerenes, namely, chiral bis-adducts of La@C(72), are reported: Eight optically active isomers were obtained by enantioselective 1,3-dipolar cycloaddition of a N-metalated azomethine ylide onto a non-isolated-pentagon rule metallofullerene derivative, La@C(72)(C(6)H(3)Cl(2)), catalyzed by a copper chiral complex. The chiral bis-adducts of La@C(72), isolated by nonchiral HPLC, showed optical purities as high as 98% as revealed by the remarkable positive or negative Cotton effects observed in the circular dichroic spectra.
  • Yutaka Maeda, Takahiro Tsuchiya, Xing Lu, Yuta Takano, Takeshi Akasaka, Shigeru Nagase
    NANOSCALE 3 (6) 2421 - 2429 2040-3364 2011 [Refereed][Not invited]
    Since the first discovery of fullerenes in 1985, the insertion of one or more atoms into a hollow fullerene cage has been attempted. Furthermore, synthesis and extraction of metallofullerene, La@C-n, were reported in 1991. Recent successful isolation and purification of metallofullerenes have facilitated the investigation of their chemical properties. This mini-review presents a summary of the recent progress of chemical functionalization and supramolecular chemistry of M@C-82. Selective functionalization and successful structural analysis of derivatives have revealed their chemical features arising from endohedral metal doping.
  • Tsukasa Nakahodo, Midori O. Ishitsuka, Yuta Takano, Takahiro Tsuchiya, Takeshi Akasaka, M. Angeles Herranz, Nazario Martin, Dirk M. Guldi, Shigeru Nagase
    PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS 186 (5) 1308 - 1311 1042-6507 2011 [Refereed][Not invited]
    Chemical functionalizations of an endohedral metallofullerene, La(2)@I(h)-C(80), and an empty fullerene, C(60), are demonstrated using organosulfur compounds. A novel donor-acceptor system of La(2)@I(h)-C(80)-exTTF (3) synthesized using the Prato reaction shows photo-induced intramolecular charge separation. On the other hand, the photoreaction of C(60) with N-p-toluenesulfonyl sulfilimine affords N-tosyl-1,2-aziridinofullerene (5). The first reversible interconversion of 1,2-aziridinofullerene and 1,6-azafulleroid was found for mono-substituted fullerenes by thermal rearrangement of 5 to 6. S,S-Diphenylsulfilimines (7) with an electron-donating group on the N atom reacts with C(60) to afford corresponding aziridinofullerenes (8-10) regioselectively. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.
  • Nobuaki Ueda, Hidefumi Nikawa, Yuta Takano, Midori O. Ishitsuka, Takahiro Tsuchiya, Takeshi Akasaka
    HETEROATOM CHEMISTRY 22 (3-4) 426 - 431 1042-7163 2011 [Refereed][Not invited]
    The azacyclobutane structure is introduced into C-60 fullerene using a photochemical reaction with formamidines. Three azetidinofullerenes (2c-2e) were synthesized,. their molecular structures were characterized using H-1, C-13, and 2D NMR, matrix-assisted laser desorption ionization (MALDI) mass spectrometry, visible spectroscopy, and electro-chemistry. Single crystal X-ray crystallographic analysis of 2e reveals a unique strained four-membered ring including nitrogen atom attached on the fullerene cage. (C) 2011 Wiley Periodicals, Inc. Heteroatom Chem 22:426-431, 2011; View this article online at DOI 10.1002/hc.20703
  • Yuta Takano, M. Angeles Herranz, Nazario Martin, Shankara Gayathri Radhakrishnan, Dirk M. Guldi, Takahiro Tsuchiya, Shigeru Nagase, Takeshi Akasaka
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 132 (23) 8048 - 8055 0002-7863 2010/06 [Refereed][Not invited]
    Stable donor acceptor conjugates (2, 3) involving an endohedral metallofullerene, La(2) @ l(h)-C(80), and pi-extended tetrathiafulvalene (exTTF) have been synthesized by highly regioselective 1,3-dipolar cycloadditions of exTTF-containing azomethine ylides to the endofullerene, yielding exclusively [5,6] metallofulleropyrrolidines with C(1) symmetry in high yields (68-77%). The cyclic voltammograms (CVs) of the conjugates reveal the redox active character of the system due to the presence of both donor and acceptor groups, that is, exTTF and La(2) @ l(h)-C(80), respectively. Furthermore, the electrochemically reversible character of the endofullerene confirms the presence of the [5,6] adduct. Despite the relatively close proximity between the exTTF and the endohedral metallofullerene (EMF), only a weak electronic interaction was observed in the ground state, as evidenced by absorption spectroscopy and CV measurements of 2 and 3. On the other hand, in the excited state the fast formation of a radical ion-pair state (i.e., 6.0 x 10(10) s(-1)), that is, the reduction of the electron accepting La(2)@C(80) and the oxidation of exTTF, evolves with lifetimes as long as several ns (3.0 x 10(8) s(-1)) in toluene. Transient absorption spectroscopy experiments confirmed these observations.
  • Yuta Takano, Midori O. Ishitsuka, Takahiro Tsuchiya, Takeshi Akasaka, Tatsuhisa Kato, Shigeru Nagase
    CHEMICAL COMMUNICATIONS 46 (42) 8035 - 8036 1359-7345 2010 [Refereed][Not invited]
    Retro-reaction of radical monoadducts of a paramagnetic endohedral metallofullerene, La@C-2v-C-82, is shown using thermal reaction in the presence of a radical trapping reagent, affording pristine La@C-2v-C-82 in high yield (96%).
  • Yuta Takano, M. Angeles Herranz, Nazario Martin, Gustavo de Miguel Rojas, Dirk M. Guldi, Ivan E. Kareev, Steven H. Strauss, Olga V. Boltalina, Takahiro Tsuchiya, Takeshi Akasaka
    CHEMISTRY-A EUROPEAN JOURNAL 16 (18) 5343 - 5353 0947-6539 2010 [Refereed][Not invited]
    The decakis(trifluoromethyl)fullerene C-1-C-70(CF3)(10), in which the CF3 groups are arranged on a para(7)-meta-para ribbon of C-6(CF3)(2) edge-sharing hexagons, and which has now been prepared in quantities of hundreds of milligrams, was reacted under standard Bingel-Hirsch conditions with a bis-pi-extended tetrathiafulvalene (exTTF) malonate derivative to afford a single exTTF(2)-C-70(CF3)(10) regioisomer in 80% yield based on consumed starting material. The highly soluble hybrid was thoroughly characterized by using 1D H-1, C-13, and F-19 NMR, 2D NMR, and UV/Vis spectroscopy; matrix-assisted laser desorpdon ionization (MALDI) mass spectrometry; and electrochemistry. The cyclic voltammogram of the exTTF(2)- C-70(CF3)(10) dyad revealed an irreversible second reduction process, which is indicative of a typical retro-Bingel reaction; whereas the usual phenomenon of exTTF inverted potentials (E-ox(1)>E-ox(2)). resulting in a single, two-electron oxidation process, was also observed. Steady-state and time-resolved photolytic techniques demonstrated that the C-1-C-70(CF3)(10) singlet excited state is subject to a rapid electron-transfer quenching. The resulting charge-separated states were identified by transient absorption spectroscopy, and radical pair lifetimes of the order of 300 ps in toluene were determined. The exTTF(2)- C-70(CF3)(10) dyad represents the first example of exploitation of the highly soluble trifluoromethylated fullerenes for the construction of systems able to mimic the photosynthetic process, and is therefore of interest in the search for new materials for photovoltaic applications.
  • Yuta Takano, M. Angeles Herranz, Ivan E. Kareev, Steven H. Strauss, Olga V. Boltalina, Takeshi Akasaka, Nazario Martin
    JOURNAL OF ORGANIC CHEMISTRY 74 (17) 6902 - 6905 0022-3263 2009/09 [Refereed][Not invited]
    The Diels-Alder reaction of C-1-C-70(CF3)(10) and 3,6-dimethoxy-1,2-quinodimethane leads regioselectively to the fort-nation of a new cycloadduct that has been fully characterized by spectroscopic and electrochemical methods as well its by X-ray diffraction.
  • Yuta Takano, Motoki Aoyagi, Michio Yamada, Hidefumi Nikawa, Zdenek Slanina, Naomi Mizorogi, Midori O. Ishitsuka, Takahiro Tsuchiya, Yutaka Maeda, Takeshi Akasaka, Tatsuhisa Kato, Shigeru Nagase
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 131 (26) 9340 - 9346 0002-7863 2009/07 [Refereed][Not invited]
    Derivatives of Ce@C-82(C-2v) have been synthesized and fully characterized, and their anisotropic magnetism has been observed as paramagnetic shifts in NMR measurements. Carbene addition by photochemical reaction afforded two isomers of Ce@C-82(C-2v)Ad (Ad = adamantylidene), 2a and 2b, demonstrating high regioselectivity. The two isomers were characterized using MALDI-TOF mass spectrometry, vis-NIR absorption spectroscopy, H-1 and C-13 NMR spectroscopy, and electrochemistry. The structure of the minor isomer (2b) was elucidated by single-crystal X-ray structural analysis. C-13 and H-1 NMR measurements revealed the characteristic anisotropic interaction between the f electron on the Ce atom and nuclear spins of the carbon atoms of the cage and the protons of the Ad group, respectively.
  • Yuta Takano, Akinori Yomogida, Hidefumi Nikawa, Michio Yamada, Takatsugu Wakahara, Takahiro Tsuchiya, Midori O. Ishitsuka, Yutaka Maeda, Takeshi Akasaka, Tatsuhisa Kato, Zdenek Slanina, Naomi Mizorogi, Shigeru Nagase
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 130 (48) 16224 - 16230 0002-7863 2008/12 [Refereed][Not invited]
    The thermal reaction of La@C-82(C-82) with 3-triphenylmethyl-5-oxazolidinone (1) in toluene affords benzyl monoadducts La@C-82(C-2v)(CH2C6H5) (2a-2d). The same monoadducts are also obtained by the photoirradiation of La@C-82(C-2v) in toluene without the existence of 1. These reactions are applicable to paramagnetic metallofullerenes, such as La@C-82(C-s) and Ce@C-82(C-2v). The photoirradiation of La@C-82(C-2v) in 1,2-dichlorobenzene in the presence of alpha,alpha,2,4-tetrachlorotoluene also affords the monoadducts La@C-82(C-2v)(CHClC6H3Cl2) (3a-3d). The monoadducts are fully characterized by spectroscopic analyses. Single-crystal X-ray structure analysis for 3d reveals the unique structure. Theoretical calculations show that the cage carbons having high,spin densities are selectively attacked by radical species to form the monoadducts linked by a carbon-carbon single bond. The thermal reaction of La@C-82(C-2v) with 1 in benzene affords metallofulleropyrrolidine La@C-82(C-2v)(C2H4NCPh3) (5), unlike the reaction in toluene.
  • Yutaka Maeda, Yuta Takano, Akiko Sagara, Masahiro Hashimoto, Makoto Kanda, Shin-ichi Kimura, Yongfu Lian, Tsukasa Nakahodo, Takahiro Tsuchiya, Takatsugu Wakahara, Takeshi Akasaka, Tadashi Hasegawa, Said Kazaoui, Nobutsugu Minami, Jing Lu, Shigeru Nagase
    CARBON 46 (12) 1563 - 1569 0008-6223 2008/10 [Refereed][Not invited]
    Purified single-walled carbon nanotubes (SWCNTs) were produced using the arc-discharge method with a combination of air oxidation and dispersion-centrifugation processes in a tetrahydrofuran solution containing an amine as a dispersant. Subsequently, SWCNT samples were analyzed using thermo gravimetric analysis, vis-near infrared absorption spectroscopy, scanning electron microscopy, and Raman spectroscopy. Results revealed that metallic SWCNTs were enriched in a supernatant through the dispersion-centrifugation process. (C) 2008 Elsevier Ltd. All rights reserved.
  • Takahiro Tsuchiya, Ryotaro Kumashiro, Katsumi Tanigaki, Yoichiro Matsunaga, Midori O. Ishitsuka, Takatsugu Wakahara, Yutaka Maeda, Yuta Takano, Motoki Aoyagi, Takeshi Akasaka, Michael T. H. Liu, Tatsuhisa Kato, Kazutomo Suenaga, Jong S. Jeong, Sumio Iijima, Fumiko Kimura, Tsunehisa Kimura, Shigeru Nagase
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 130 (2) 450 - + 0002-7863 2008/01 [Refereed][Not invited]
    Nanorods of La@C-82(Ad) (Ad = adamantylidene) were prepared via the liquid-liquid interfacial precipitation method. From the SEM, HRTEM, EELS, and SADEP analyses, it was revealed that the nanorods consist of a single crystal of La@C-82(Ad). The field-effect transistor (FET) measurement of the La@C-82(Ad) nanorods shows a p-type action. The magnetic orientation of the nanorods was observed; that is, the nanorods of La@C-82(Ad) oriented with the nanorod axis perpendicular to the magnetic field.

Books etc

  • Chemical Science of pi-Electron Systems Part II. Curved pi-Electron Systems
    M. Yamada, S. Sato, Y. Takano, L. Feng, S. Nagase, T. Akasaka (ContributorEndohedral Metallofullerenes: From Chemical Reactivity to Material Performance)
    Springer, Berlin, Germany 2015
  • Organic Nanomaterials -Synthesis, Characterization, and Device Applications-
    M. Yamada, X. Lu, L. Feng, S. Sato, Y. Takano, S. Nagase, T. Akasaka (ContributorFundamental and Applied Aspects of Endohedral Metallofullerenes as Promising Carbon Nanomaterials)
    Wiley, London, U.K. 2013

Conference Activities & Talks

  • Delayed Red-Shifted Emission by Energy Transfer-Induced Photon Recycling in Pressed Lead Halide Perovskites  [Not invited]
    S. Bhagya Lakshmi, S. Ghimire, Y. Takano, K. Yuyama, V. P. Biju
    2019年光化学討論会  2019/09
  • The Activated Reaction of Singlet Oxygen Trapped in an Electron Donor-Acceptor Molecular Sensor  [Not invited]
    D. Sasikumar, Y. Takano, M. Hamada, K. Yuyama, Y. Kobori, V. P. Biju
    2019年光化学討論会  2019/09
  • Mitochondrial targeting phototherapy by near-infrared light and pi-extended porphyrin/drug delivery carrier conjugate  [Invited]
    Yuta Takano
    7th International conference for young chemists  2019/08
  • 有機分子の特異な光励起状態を利用したミトコンドリア内酸化・還元反応の誘起  [Invited]
    髙野 勇太
    第72回日本酸化ストレス学会  2019/06
  • Steady-state Spectroscopic Studies of the Kinetics of Singlet Oxygen Sensing by 9-Substituted Anthracene Derivatives  [Not invited]
    D. Sasikumar, Y. Takano, K. Yuyama, V. P. Biju
    日本化学会第99春季年会  2019/03
  • Conjugate of pi-extended porphyrin/drug delivery carrier for near-infrared cancer phototherapy  [Not invited]
    Yuta Takano, Satrialdi, Reina Munechika, Hideyoshi Harashima, Yuma Yamada, Vasudevan Pillai Biju
    日本化学会第99春季年会  2019/03
  • Anisotropic magnetic properties of an endohedral metallofullerene for molecular location sensing  [Not invited]
    Y. Takano, R. Tashita, M. Suzuki, H. Imahori, T. Akasaka
    56th The American Chemical Society meeting  2018/08
  • Extended Diffusion of Charge Carriers in Perovskite Nanocrystal Assembly  [Not invited]
    S. Ghimire, L. Chouhan, K. Yuyama, Y. Takano, V. P. Biju
    日本化学会第98春季年会  2018/03
  • Photoinduced reductive reaction in mitochondria by electron donor/acceptor linked molecules  [Not invited]
    Y. Takano, R. Munechika, V. P. Biju, H. Harashima, H. Imahori, Y. Yamada
    日本化学会第98春季年会  2018/03
  • Development of Electron Donor-Acceptor Conjugates for Utilizing Photoinduced Charge Separated State in Cell Environment  [Not invited]
    Y. Takano, T. Numata, K. Fujishima, T. Murakami, M. Kengaku, S. Sakaki, Y. Mori, H. Imahori
    iCeMS International Symposium Hierarchical Dynamics in Soft Materials and Biological Matter  2015/09
  • Unprecedented Chemical Reactivities and Potential Utilities of Paramagnetic Endohedral Metallofullerenes  [Invited]
    Y. Takano, T. Akasaka
    The 227th the Electrochemical Society (ECS) meeting, Chicago, U.S.A.  2015/05
  • Development of Porphyrin-Fullerene Based Donor-Acceptor Conjugates for Utilizing Photoinduced Charge Separated State in Cell Environment  [Not invited]
    Y. Takano, H. Imahori
    2nd symposium on Nanocarbon bio symposium, Tokyo, Japan  2015/02
  • Development of Porphyrin-Fullerene Based Donor-Acceptor Conjugates for Utilizing Photoinduced Charge Separated State in Cell Environment  [Invited]
    Yuta Takano
    International SPIRITS Symposium “Creation of Bio-Inspired, Non-Biological Mesoscale Hybrid Materials”, Kyoto, Japan  2014/11
  • Regulation of cell membrane potential and ion transport by utilizing photo-induced charge separation in organic molecules  [Invited]
    Yuta Takano
    iCeMS International Symposium “Light Control in Cell Biology”, Kyoto, Japan  2014/06
  • Synthesis and Photophysical and Photoelectrochemical Properties of Diazaporphyrin-Fullerene Linked Dyad  [Not invited]
    M. Yamamoto, Y. Takano, Y. Matano, K. Stranius, N. V. Tkachenko, H. Lemmetyinen, H. Imahori
    225th the Electrochemical Society (ECS) meeting  2014/05
  • Unique Molecular Properties of a Paramagnetic Endohedral Metallofullerene La@C82: Its Chemical Reactivities, and Electronic and Magnetic Properties  [Invited]
    Y. Takano, J. Veciana, D. M. Guldi, N. Martin, T. Akasaka
    The 225th the Electrochemical Society (ECS) meeting, Orlando, U.S.A.  2014/05
  • Photoinduced depolarization in membrane of PC12 by fullerene-porphyrin linked molecules  [Not invited]
    Y. Takano, T. Numata, K. Miyake, T. Murakami, Y. Mori, H. Imahori
    The 36th annual meeting of the Molecular Biology Society of Japan, Kobe, Japan  2013/12
  • Unprecedented Chemical, Electronic and Magnetic Properties of a Paramagnetic Endohedral Metallofullerene La@C82  [Invited]
    Y. Takano, J. Veciana, D. S. Guldi, N. Martin, T. Akasaka
    3th Symposium on Carbon Nanoforms, Madrid, Spain  2013/09
  • Intra-molecular electron accepting and donating systems based on endohedral metallofullerenes  [Not invited]
    Y. Takano, M. A. Herranz, N. Martin, D. M. Guldi, S. Nagas, T. Akasaka
    The 15th International Symposium on Novel Aromatic Compounds (ISNA)  2013/07
  • Photoregulation of Mammalian Cell Membrane Potential by Porphyrin/Fullerene based Donor/Acceptor Linked Molecules  [Not invited]
    Y. Takano, T. Numata, T. Murakami, F. Kawashima, N. Morone, J. E. Heuser, Y. Mori, H. Imahori
    The 15th International Symposium on Novel Aromatic Compounds (ISNA)  2013/07
  • Inhibition of potassium channels and control of cell membrane potentials by photo-induced charge separated molecules  [Not invited]
    Y. Takano, T. Numata, T. Murakami, F, Kawashima, N. Morone, J. E. Heuser, Y. Mori, H. Imahori
    第93回日本化学会春季年会  2013/03
  • Establishment of intra-molecular electron accepting and donating systems based on endohedral metallofullerenes  [Not invited]
    Y. Takano, N. Mizorogi, M. A. Herranz, N. Martin, D. M. Guldi, S. Nagase, T. Akasaka
    第43回フラーレン•ナノチューブ・グラフェン総合シンポジウム, Miyagi, Japan  2012/09
  • Establishment of intra-molecular electron accepting and donating systems based on endohedral metallofullerenes  [Not invited]
    Y. Takano, S. Obuchi, N. Mizorogi, M. A. Herranz, N. Martin, S. Wolfrum, D. M. Guldi, S. Nagase, T. Akasaka
    10th International Conference on Heteroatom Chemistry (ICHAC), Kyoto, Japan  2012/05
  • Donor-Acceptor Conjugates of Lanthanum Endohedral Metallofullerene, La2@C80, and π-Extended Tetrathiafulvalene  [Invited]
    Y. Takano, M. A. Herranz, N, Martin, S. G. Radhakrishnan, D. M. Guldi, T. Tsuchiya, T. Akasaka
    PACIFICHEM 2010, Honolulu, U.S.A.  2010/12
  • Development of Porphyrin-Fullerene Based Amphiphilic Donor-Acceptor Conjugates for Photocontrol on Cell Membrane Potential  [Not invited]
    Y. Takano, T. Numata, M. Kengaku, T. Murakami, Y. Mori, H. Imahori
    The 95st Annual Meeting of the Chemical Society of Japan, Chiba, Japan
  • Porphyrin-Fullerene Based Donor-Acceptor Conjugates for Photocontrol of Cell Membrane Potentials  [Not invited]
    Y. Takano, T. Numata, K. Fujishima, T. Murakami, M. Kengaku, Y. Mori, H. Imahori
    The 227th the Electrochemical Society (ECS) meeting, Chicago, U.S.A.


  • 金属有機構造体(MOF)の光エネルギーのリレーを利用したイメージング
    髙野 勇太  日本薬学会誌 ファルマシア  55-  (3)  253  -253  2019/03  [Not refereed][Invited]
  • 光機能性フラーレンを用いた細胞機能の光制御アプローチ
    髙野 勇太  生物工学会誌  95-  (12)  705  -707  2017/12  [Not refereed][Invited]

Awards & Honors

  • 2016/10 フラーレン・ナノチューブ・グラフェン学会 第13回大澤賞
    受賞者: 髙野 勇太
  • 2011/08 日本化学会第4回関東支部大会 優秀講演賞
    受賞者: 髙野 勇太

Educational Activities

Teaching Experience

  • Course in Materials Science II
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 環境科学院
    キーワード : 化学熱力学、ギブズ自由エネルギー、化学平衡、反応速度論、電気化学 Chemical Thermodynamics, Gibbs Free Energy, Chemical Equilibrium, Reaction Kinetics, Electrochemistry
  • Advanced Course in Molecular Photonics and Electronics Science I
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 環境科学院
    キーワード : Blackbody radiation, Maxwell’s equations, Wave equations, Light-matter interactions, the Frank-Condon Principle, Beer-Lambert law, molecular optical absorption, Jablonski diagram, Fluorescence lifetime and quantum yield, Fluorescence quenching, Quantum confinement, Heterojunctions and Superlattices, Light emitting devices, and Solar cell
  • Inter-Graduate School Classes(General Subject):Natural and Applied Sciences
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 大学院共通科目
  • English Seminar
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : The history of earth, atmospheric gases,the evolution of life, photosynthesis, deforestation, pollution, environmental foot print, radiation hazard, energy and environment
  • Arts and Science Courses in English 2
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 国際本部
    キーワード : The history of earth, atmospheric gases,the evolution of life, photosynthesis, deforestation, pollution, environmental foot print, radiation hazard, energy and environment

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