原著論文

• Photoisomerization of “Partially Embedded Dihydropyridazine” with a Helical Structure

  K. Usui, A. Amano, K. Murayama, M. Sasaya, R. Kusumoto, T. Umeno, S. Murase, N. Iizuka, S. Matsumoto, Y. Fuchi, K. Takahashi, M. Kawahata, Y. Kobori, S. Karasawa

  Chem. Eur. J., 29, e202302413 (10 pages) (2023).

• Pressure Effect of Spin Gap Substance Cu₂(C₅H₁₂N₂)₂Cl₄

  T. Sakurai, R. Takehara, N. Nagasawa, H. Takahashi, M. Saga, K. Takahashi, S. Okubo, H. Ohta

  JPS Conf. Proc., 38, 011145 (6 pages) (2023).

• Molecular Structures and Redox Properties of Homoleptic Aluminum(III) Complexes with Azobisphenolate (azp) Ligands

  K. Takahashi, T. Noguchi, K. Ueda, A. Miyawaki, S. Murata

  Inorganics, 10, 84 (15 pages) (2022).

• Spin-Crossover-Triggered Linkage Isomerization by the Pedal-like Motion of the Azobenzene Ligand in a Neutral Heteroleptic Iron(III) Complex

  A. Miyawaki, K. Eda, T. Mochida, T. Sakurai, H. Ohta, T. Nakajima, K. Takahashi

  Inorg. Chem., 60, 12735-12739 (2021).

• The Impact of the Next-Nearest Neighbor Dispersion Interactions on Spin Crossover Transition Enthalpy Evidenced by Experimental and Computational Analyses of Neutral π-Extended Heteroleptic Fe(III) Complexes

  A. Miyawaki, T. Mochida, T. Sakurai, H. Ohta, K. Takahashi

  Inorg. Chem., 59, 12295-12303 (2020).

• Proximity coupling of superconducting nanograins with fractal distributions

  T. Uchino, N. Teramachi, R. Matsuzaki, E. Tsushima, S. Fujii, Y. Seto, K. Takahashi, T. Mori, Y. Adachi, Y. Nagashima, Y. Sakaguchi, K. Ohishi, A. Koda, T. Sakurai, H. Ohta

  Phys. Rev. B, 101, 035146 (12 pages) (2020).

• Ligand Mixed-Valence and Electrical Conductivity in Coordination Complexes Containing a Redox-Active Phenalenol-Substituted Ligand

  S. Dale, N. M. Bonanno, M. Pelaccia, A. J. Lough, A. Miyawaki, K. Takahashi, M. T. Lemaire

  Dalton Trans., 48, 8053-8056 (2019).

• Dynamics of Water Molecules in a 3-Fold Interpenetrated Hydrogen-Bonded Organic Framework Based on Tetrakis(4-pyridyl)methane

  D. Inokuchi, Y. Hirao, K. Takahashi, K. Matsumoto, H. Mori, T. Kubo

  J. Phys. Chem. C, 123, 6599-6606 (2019).

• High-Temperature Cooperative Spin Crossover Transitions and Single-Crystal Reflection Spectra of [Fe^III(qsal)₂](CH₃OSO₃) and Related Compounds

  K. Takahashi, K. Yamamoto, T. Yamamoto, Y. Einaga, Y. Shiota, K. Yoshizawa, H. Mori

  Crystals, 9, 81 (22 pages) (2019).

• Paramagnetic organometallic ionic liquids exhibiting thermochromism based on monomer-dimer equilibrium of cationic half-sandwich complexes

  T. Inagaki, T. Mochida, K. Takahashi, T. Sakurai, H. Ohta

  J. Mol. Liq., 269, 882-885 (2018).

• Photogeneration of Microporous Amorphous Coordination Polymers from Organometallic Ionic Liquids

  T. Ueda, T. Tominaga, T. Mochida, K. Takahashi, S. Kimura

  Chem. Eur. J., 24, 9490-9493 (2018).

• Contribution of Coulomb interactions to a two-step crystal structure phase transformation coupled with a significant change in spin crossover behavior for a series of charged Fe^II complexes from 2,6-bis(2-methylthiazol-4-yl)pyridine

  K. Takahashi, M. Okai, T. Mochida, T. Sakurai, H. Ohta, T. Yamamoto, Y. Einaga, Y. Shiota, K. Yoshizawa, H. Konaka, A. Sasaki

  Inorg. Chem., 57, 1277-1287 (2018).

• Paramagnetic ionic plastic crystals containing the octamethylferrocenium cation: counteranion dependence of phase transitions and crystal structures

  T. Mochida, M. Ishida, T. Tominaga, K. Takahashi, T. Sakurai, H. Ohta

  Phys. Chem. Chem. Phys., 20, 3019-3028 (2018).

• Spin-singlet transition in the magnetic hybrid compound from a spin-crossover Fe(III) cation and π-radical anion

  K. Takahashi, T. Sakurai, W.M. Zhang, S. Okubo, H. Ohta, T. Yamamoto, Y. Einaga, H. Mori

  Inorganics, 5, 54 (14 pages) (2017).

• Cooperative spin-crossover transition from three-dimensional purely π-stacking interactions in a neutral heteroleptic azobisphenolate Fe^III complex with N₃O₃ coordination sphere

  S. Murata, K. Takahashi, T. Mochida, T. Sakurai, H. Ohta, T. Yamamoto, Y. Einaga

  Dalton Trans., 46, 5786-5789 (2017).

• Single-crystal-to-single-crystal transformation in hydrogen-bond-induced high-spin pseudopolymorphs from protonated cation salts with a π-extended spin crossover Fe(III) complex

  S. Murata, K. Takahashi, T. Sakurai, H. Ohta

  Polyhedron, 136, 170-175 (2017).

• Thermochromic magnetic ionic liquids from cationic nickel(II) complexes exhibiting intramolecular coordination equilibrium

  X. Lan, T. Mochida, Y. Funasako, K. Takahashi, T. Sakurai, H. Ohta

  Chem. Eur. J., 23, 823-831 (2017).

• Directional electron transfer in crystals of [CrCo] dinuclear complexes achieved by chirality-assisted preparative method

  S. Kanegawa, Y. Shiota, S. Kang, K. Takahashi, H. Okajima, A. Sakamoto, T. Iwata, H. Kandori, K. Yoshizawa, O. Sato

  J. Am. Chem. Soc., 138, 14170-14173 (2016).

• Above room temperature organic ferroelectrics: diprotonated 1,4-diazabicyclo[2.2.2]octane shifts between two 2-chlorobenzoates

  Z.-S. Yao, K. Yamamoto, H.-L. Cai, K. Takahashi, O. Sato

  J. Am. Chem. Soc., 138, 12005-12008 (2016).

• Coherent interface structures and intergrain Josephson coupling in dense MgO/Mg₂Si/MgB₂ nanocomposites

  K. Ueno, Y. Nagashima, Y. Seto, M. Matsumoto, T. Sakurai, H. Ohta, K. Takahashi, T. Uchino

  J. Appl. Phys., 120, 015102 (10 pages) (2016).

• The role of Coulomb interactions for spin crossover behaviors and crystal structural transformation in novel anionic Fe(III) complexes from a π-extended ONO ligand

  S. Murata, K. Takahashi, T. Sakurai, H. Ohta, T. Yamamoto, Y. Einaga, Y. Shiota, K. Yoshizawa

  Crystals, 6, 49 (16 pages) (2016).

• A new family of anionic Fe^III spin crossover complexes featuring a weak-field N₂O₄ coordination octahedron

  K. Takahashi, K. Kawamukai, M. Okai, T. Mochida, T. Sakurai, H. Ohta, T. Yamamoto, Y. Einaga, Y. Shiota, K. Yoshizawa

  Chem. Eur. J., 22, 1253-1257 (2016).

• Organometallic ionic liquids from half-sandwich Ru(II) complexes with various chelating ligands

  T. Inagaki, K. Abe, K. Takahashi, T. Mochida

  Inorg. Chim. Acta, 438, 112-117 (2015).

• Synthesis of racemic and chiral BEDT-TTF derivatives possessing hydroxy groups and their achiral and chiral charge transfer complexes

  S. J. Krivickas, C. Hashimoto, J. Yoshida, A. Ueda, K. Takahashi, J. D. Wallis, H. Mori

  Beilstein J. Org. Chem., 11, 1561-1569 (2015).

• Novel Fe(II) spin crossover complexes involving a chalcogen-bond and π-stacking interactions with a paramagnetic and nonmagnetic M(dmit)₂ anion (M = Ni, Au; dmit = 4,5-dithiolato-1,3-dithiole-2- thione)

  M. Okai, K. Takahashi, T. Sakurai, H. Ohta, T. Yamamoto, Y. Einaga

  J. Mater. Chem. C, 3, 7858-7864 (2015).

• New tris- and pentakis-fused donors containing extended tetrathiafulvalenes: New positive electrode materials for rechargeable batteries

  S. Iwamoto, Y. Inatomi, D. Ogi, S. Shibayama, Y. Murakami, M. Kato, K. Takahashi, K. Tanaka, N. Hojo, Y. Misaki

  Beilstein J. Org. Chem., 11, 1136-1147 (2015).

• Antiferromagnetic transition in a novel star-shaped high spin Fe(III) tetranuclear cluster from a mononuclear coordination anion featuring π-extended Schiff base ligands

  K. Takahashi, K. Kawamukai, T. Mochida, T. Sakurai, H. Ohta, T. Yamamoto, Y. Einaga, H. Mori, Y. Shimura, T. Sakakibara, T. Fujisawa, A. Yamaguchi, A. Sumiyama

  Chem. Lett., 44, 840-842 (2015).

• A biferrocenium salt containing paramagnetic tetracyanoquinodimethane hexamers: charge disproportionation via donor–acceptor interactions

  T. Mochida, Y. Funasako, K. Takahashi, M. Inokuchi, T. Sakurai, S. Ikeda, H. Ohta, H. Mori, M. Uruichi

  Chem. Commun., 50, 13370-13372 (2014).

• Molecular motor-driven abrupt anisotropic shape change in a single crystal of a Ni complex

  Z.-S. Yao, M. Mito, T. Kamachi, Y. Shiota, K. Yoshizawa, N. Azuma, Y. Miyazaki, K. Takahashi, K. Zhang, T. Nakanishi, S. Kang, S. Kanegawa, O. Sato

  Nat. Chem., 6, 1079-1083 (2014).

• Gapless quantum spin liquid in an organic spin-1/2 triangular-lattice κ-H₃(Cat-EDT-TTF)₂

  T. Isono, H. Kamo, A. Ueda, K. Takahashi, M. Kimata, H. Tajima, S. Tsuchiya, T. Terashima, S. Uji, H. Mori

  Phys. Rev. Lett., 112, 177201(5pages) (2014).

• Synergistic spin transition between spin crossover and spin-Peierls-like singlet formation in the halogen-bonded molecular hybrid system: [Fe(Iqsal)₂][Ni(dmit)₂]·CH₃CN·H₂O

  K. Fukuroi, K. Takahashi, T. Mochida, T. Sakurai, H. Ohta, T. Yamamoto, Y. Einaga, H. Mori

  Angew. Chem. Int. Ed., 53, 1983-1986 (2014).

• Reversible iodine absorption of nonporous coordination polymer Cu(TCNQ)

  K. Miyao, A. Funabiki, K. Takahashi, T. Mochida, M. Uruichi

  New J. Chem., 38, 739-743 (2014).

• A less common spin-crossover process observed in the six-coordinated model heme complexes

  Y. Ohgo, M. Takahashi, S. Neya, M. Nakamura, K. Takahashi, Y. Namatame, H. Konaka, H. Mori, D. Hashizume

  Polyhedron, 66, 60-64 (2013).

• Preparation of the nanoribbons of blue potassium molybdenum bronze

  T. Nishida, K. Eda, K. Takahashi, T. Sakurai, H. Ohta, M. S. Whittingham

  Chem. Lett., 42, 1514-1516 (2013).

• Optical conductivity measurement of a dimer Mott-insulator to charge-order phase transition in a two-dimensional quarter-filled organic salt compound

  R. Okazaki, Y. Ikemoto, T. Moriwaki, T. Shikama, K. Takahashi, H. Mori, H. Nakaya, T. Sasaki, Y. Yasui, I. Terasaki

  Phys. Rev. Lett., 111, 217801(5pages) (2013).

• A spin-crossover ionic liquid from the cationic iron(III) Schiff base complex

  M. Okuhata, Y. Funasako, K. Takahashi, T. Mochida

  Chem. Commun., 49, 7662-7664 (2013).

• Hydrogen Bond-promoted Metallic State in a purely Organic Single-component Conductor under Pressure

  T. Isono, H. Kamo, A. Ueda, K. Takahashi, A. Nakao, R. Kumai, H. Nakao, K. Kobayashi, Y. Murakami, H. Mori

  Nat. Commun., 4, 1334 (6 pages) (2013).

• Magnetism and Pressure-induced Superconductivity of Checkerboard-type Charge-ordered Molecular Conductor β-(meso-DMBEDT-TTF)₂X (X = PF₆ and AsF₆)

  T. Shikama, T. Shimokawa, S. Lee, T. Isono, A. Ueda, K. Takahashi, A. Nakao, R. Kumai, H. Nakao, K. Kobayashi, Y. Murakami, M. Kimata, H. Tajima, K. Matsubayashi, Y. Uwatoko, Y. Nishio, K. Kajita, H. Mori

  Crystals, 2, 1502-1513 (2012).

• Charge-order driven proton arrangement in a hydrogen-bonded charge-transfer complex based on a pyridyl-substituted TTF derivative

  S. C. Lee, A. Ueda, H. Kamo, K. Takahashi, M. Uruichi, K. Yamamoto, K. Yakushi, A. Nakao, R. Kumai, K. Kobayashi, H. Nakao, Y. Murakami, H. Mori

  Chem. Commun., 48, 8673-8675 (2012).

• Vapochromic Ionic Liquids from Metal-Chelate Complexes Exhibiting Reversible Changes in Color, Thermal, and Magnetic Properties

  Y. Funasako, T. Mochida, K. Takahashi, T. Sakurai, H. Ohta

  Chem. Eur. J., 18, 11929-11936 (2012).

• Synthesis and properties of catechol-fused tetrathiafulvalene derivatives and their hydrogen-bonded conductive charge-transfer salts

  H. Kamo, A. Ueda, T. Isono, K. Takahashi, H. Mori

  Tetrahedron Lett., 53, 4385-4388 (2012).

• Development of chiral molecular crystals

  S. J. Krivickas, C. Hashimoto, K. Takahashi, J. D. Wallis, H. Mori

  Phys. Status Solidi C, 9, 1146-1148 (2012).

• Reversible iodine absorption by alkali-TCNQ salts with associated changes in physical properties

  A. Funabiki, T. Mochida, K. Takahashi, H. Mori, T. Sakurai, H. Ohta, M. Uruichi

  J. Mater. Chem., 22, 8361-8366 (2012).

• Manipulation of the heme electronic structure by external stimuli and ligand field

  Y. Ohgo, M. Takahashi, K. Takahashi, Y. Namatame, H. Konaka, H. Mori, S. Neya, S. Hayami, D. Hashizume, M. Nakamura

  Hyperfine interact., 206, 23-33 (2012).

• Cooperative spin transition and thermally quenched high-spin state in new polymorph of [Fe(qsal)₂]I₃

  K. Takahashi, T. Sato, H. Mori, H. Tajima, Y. Einaga, O. Sato

  Hyperfine interact., 206, 1-5 (2012).

• One-dimensional antiferromagnetic behavior of a chiral molecular crystal, α' -(S,S-DMBEDT-TTF)₂PF₆

  S. J. Krivickas, A. Ichikawa, K. Takahashi, H. Tajima, J. D. Wallis, H. Mori

  Synth. Met., 161, 1563-1565 (2011).

• Structural and Magnetic Studies on Two-Dimensional Square Planar Lattice Magnets Composed of Organic Radical Action Salts (Benzo[1,2-d:4,5-d'] Bis[1,3,2]dithiazolyl-2-zolium)X (X = TlBr₄, TlI₄, and InI₄)

  W. Fujita, K. Takahashi, H. Kobayashi

  Cryst. Growth Des., 11, 575-582 (2011).

• Structures and Electrical Properties of (BTM-TS-TTP)₄PF₆

  M. Yasuda, E. Fujiwara, S. Aonuma, H. Fujiwara, T. Sugimoto, T. Nakayashiki, K. Tanaka, K. Takahashi, H. Kobayashi, Y. Misaki

  Bull. Chem. Soc. Jpn., 84, 79-81 (2011).