All Stories

  1. 2,2′-Azobisphenolate Ligand Bearing Electron-Donating Methoxy Substituents: Spin-Crossover Ligand Field for a Fe(III) Complex and Stabilization of Ligand-Centered Oxidation Species Due to Its Resonance Effect

    Article • Inorganics, August 2026, MDPI AG

    Dr Kazuyuki Takahashi

  2. Elucidating the Transition Kernel and Anharmonic Coupling in the Spin‐crossover Process of a [Fe III (qsal) 2 ] CH 3 ...

    Article • Angewandte Chemie, April 2026, Wiley

    Dr Kazuyuki Takahashi

  3. Quaternary Ammonium Salts with B(CN) 4 or C(CN) 3 Anions: From Ionic Plastic Crystals and Ionic Liquids to Meltable Coordination Polymers

    Article • Crystal Growth & Design, March 2026, American Chemical Society (ACS)

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

  4. Synthesis and structural characterization of the racemic and meso forms of 2,2′′-dibromo-1,1′′-biferrocenes and their mixed-valence salts

    Article • CrystEngComm, January 2025, Royal Society of Chemistry

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

  5. The Relationship Between Spin Crossover (SCO) Behaviors, Cation and Ligand Motions, and Intermolecular Interactions in a Series of Anionic SCO Fe(III) Complexes with Halogen-Substituted Azobisphenolate Ligands

    Article • Molecules, November 2024, MDPI AG

    Dr Kazuyuki Takahashi

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

    Article • Inorganics, June 2022, MDPI AG

    Dr Kazuyuki Takahashi

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

    Article • Inorganic Chemistry, August 2021, American Chemical Society (ACS)

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

  8. 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

    Article • Inorganic Chemistry, August 2020, American Chemical Society (ACS)

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

  9. Proximity coupling of superconducting nanograins with fractal distributions

    Article • Physical Review B, January 2020, American Physical Society (APS)

    Dr Kazuyuki Takahashi

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

    Article • The Journal of Physical Chemistry C, February 2019, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  11. High-Temperature Cooperative Spin Crossover Transitions and Single-Crystal Reflection Spectra of [FeIII(qsal)2](CH3OSO3) and Related Compounds

    Article • Crystals, February 2019, MDPI AG

    Dr Kazuyuki Takahashi

  12. Ligand mixed-valence and electrical conductivity in coordination complexes containing a redox-active phenalenol-substituted ligand

    Article • Dalton Transactions, January 2019, Royal Society of Chemistry

    Dr Kazuyuki Takahashi

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

    Article • Journal of Molecular Liquids, November 2018, Elsevier

    Dr Kazuyuki Takahashi, Tomoyuki Mochida

  14. Photogeneration of Microporous Amorphous Coordination Polymers from Organometallic Ionic Liquids

    Article • Chemistry - A European Journal, June 2018, Wiley

    Dr Kazuyuki Takahashi, Tomoyuki Mochida

  15. Spin-Crossover Complexes

    Article • Inorganics, March 2018, MDPI AG

    Dr Kazuyuki Takahashi

  16. 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 FeII Complexes from 2,6-Bis(2-methylthiazol-4-yl)pyridine

    Article • Inorganic Chemistry, January 2018, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi, Tomoyuki Mochida

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

    Article • Physical Chemistry Chemical Physics, January 2018, Royal Society of Chemistry

    Dr Kazuyuki Takahashi, Tomoyuki Mochida

  18. 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 anion

    Article • Polyhedron, November 2017, Elsevier

    Dr Kazuyuki Takahashi

  19. Spin-Singlet Transition in the Magnetic Hybrid Compound from a Spin-Crossover Fe(III) Cation and π-Radical Anion

    Article • Inorganics, August 2017, MDPI AG

    Dr Kazuyuki Takahashi

  20. Cooperative spin-crossover transition from three-dimensional purely π-stacking interactions in a neutral heteroleptic azobisphenolate FeIII complex with a N3O3 coordination sphere

    Article • Dalton Transactions, January 2017, Royal Society of Chemistry

    Dr Kazuyuki Takahashi, Tomoyuki Mochida

  21. Development of Novel Functional Molecular Crystals by Utilizing Dynamic Hydrogen Bonds

    Article • Journal of Synthetic Organic Chemistry Japan, January 2017, The Society of Synthetic Organic Chemistry, Japan

    Dr Kazuyuki Takahashi

  22. Thermochromic Magnetic Ionic Liquids from Cationic Nickel(II) Complexes Exhibiting Intramolecular Coordination Equilibrium

    Article • Chemistry - A European Journal, December 2016, Wiley

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

  23. Directional Electron Transfer in Crystals of [CrCo] Dinuclear Complexes Achieved by Chirality-Assisted Preparative Method

    Article • Journal of the American Chemical Society, October 2016, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  24. Above Room Temperature Organic Ferroelectrics: Diprotonated 1,4-Diazabicyclo[2.2.2]octane Shifts between Two 2-Chlorobenzoates

    Article • Journal of the American Chemical Society, September 2016, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  25. Coherent interface structures and intergrain Josephson coupling in dense MgO/Mg2Si/MgB2nanocomposites

    Article • Journal of Applied Physics, July 2016, American Institute of Physics

    Dr Kazuyuki Takahashi

  26. 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

    Article • Crystals, May 2016, MDPI AG

    Dr Kazuyuki Takahashi

  27. A New Family of Anionic FeIII Spin Crossover Complexes Featuring a Weak-Field N2 O4 Coordination Octahedron

    Article • Chemistry - A European Journal, December 2015, Wiley

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

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

    Article • Inorganica Chimica Acta, November 2015, Elsevier

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

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

    Article • Beilstein Journal of Organic Chemistry, September 2015, Beilstein Institut

    Dr Kazuyuki Takahashi

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

    Article • Beilstein Journal of Organic Chemistry, July 2015, Beilstein Institut

    Dr Kazuyuki Takahashi

  31. Antiferromagnetic Transition in a Novel Star-shaped High-spin Fe(III) Tetranuclear Cluster from a Mononuclear Coordination Anion Featuring π-Extended Schiff Base Ligands

    Article • Chemistry Letters, June 2015, The Chemical Society of Japan

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

  32. 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)

    Article • Journal of Materials Chemistry C, January 2015, Royal Society of Chemistry

    Dr Kazuyuki Takahashi

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

    Article • Nature Chemistry, October 2014, Nature

    Dr Kazuyuki Takahashi

  34. Gapless Quantum Spin Liquid in an Organic Spin-1/2 Triangular-Lattice κ − H 3 ( Cat-EDT-TTF ) 2

    Article • Physical Review Letters, April 2014, American Physical Society (APS)

    Dr Akira UEDA, Dr Kazuyuki Takahashi

  35. 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

    Article • Angewandte Chemie, January 2014, Wiley

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

  36. Reversible iodine absorption of nonporous coordination polymer Cu(TCNQ)

    Article • New Journal of Chemistry, January 2014, Royal Society of Chemistry

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

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

    Article • Chemical Communications, January 2014, Royal Society of Chemistry

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

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

    Article • Polyhedron, December 2013, Elsevier

    Dr Kazuyuki Takahashi

  39. Optical Conductivity Measurement of a Dimer Mott-Insulator to Charge-Order Phase Transition in a Two-Dimensional Quarter-Filled Organic Salt Compound

    Article • Physical Review Letters, November 2013, American Physical Society (APS)

    Professor Ichiro Terasaki, Dr Kazuyuki Takahashi

  40. Hydrogen bond-promoted metallic state in a purely organic single-component conductor under pressure

    Article • Nature Communications, January 2013, Nature

    Dr Kazuyuki Takahashi

  41. Preparation of Nanoribbons of Blue Potassium Molybdenum Bronze

    Article • Chemistry Letters, January 2013, Chemical Society of Japan

    Professor M Stanley Whittingham, Dr Kazuyuki Takahashi

  42. A spin-crossover ionic liquid from the cationic iron(iii) Schiff base complex

    Article • Chemical Communications, January 2013, Royal Society of Chemistry

    Dr Kazuyuki Takahashi, Tomoyuki Mochida

  43. Magnetism and Pressure-Induced Superconductivity of Checkerboard-Type Charge-Ordered Molecular Conductor β-(meso-DMBEDT-TTF)2X (X = PF6 and AsF6)

    Article • Crystals, November 2012, MDPI AG

    Dr Akira UEDA, Dr Kazuyuki Takahashi

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

    Article • Chemistry - A European Journal, August 2012, Wiley

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

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

    Article • Tetrahedron Letters, August 2012, Elsevier

    Dr Kazuyuki Takahashi

  46. Development of chiral molecular crystals

    Article • physica status solidi c, March 2012, Wiley

    Dr Kazuyuki Takahashi

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

    Article • Chemical Communications, January 2012, Royal Society of Chemistry

    Dr Akira UEDA, Dr Kazuyuki Takahashi

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

    Article • Journal of Materials Chemistry, January 2012, Royal Society of Chemistry

    Tomoyuki Mochida, Dr Kazuyuki Takahashi

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

    Article • Hyperfine Interactions, December 2011, Springer Science + Business Media

    Dr Kazuyuki Takahashi

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

    Article • Hyperfine Interactions, December 2011, Springer Science + Business Media

    Dr Kazuyuki Takahashi

  51. One-dimensional antiferromagnetic behavior of a chiral molecular crystal, α′-(S,S-DMBEDT-TTF)2PF6

    Article • Synthetic Metals, August 2011, Elsevier

    Dr Kazuyuki Takahashi

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

    Article • Crystal Growth & Design, January 2011, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

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

    Article • Bulletin of the Chemical Society of Japan, December 2010, Oxford University Press (OUP)

    Dr Kazuyuki Takahashi

  54. Correlation between the magnetic behaviors and dimensionality of intermolecular interactions in Fe(III) spin crossover compounds

    Article • Physica B Condensed Matter, June 2010, Elsevier

    Dr Kazuyuki Takahashi

  55. Dielectric response of novel one-dimensional hydrogen-bonded molecular crystal [4,6-dmpH][Hca]

    Article • Physica B Condensed Matter, June 2010, Elsevier

    Dr Kazuyuki Takahashi

  56. Peculiar electric-field-induced metastable state of charge-ordered molecular conductor β-(meso-DMBEDT-TTF)2PF6

    Article • Physica B Condensed Matter, June 2010, Elsevier

    Dr Kazuyuki Takahashi

  57. Metallic coordination supramolecule, [Cu(i)Cl0.2Br1.3(pyra-TTF)0.5+]

    Article • Journal of Materials Chemistry, January 2010, Royal Society of Chemistry

    Dr Kazuyuki Takahashi

  58. Superconductivity competitive with checkerboard-type charge ordering in the organic conductorβ−

    Article • Physical Review B, September 2009, American Physical Society (APS)

    Dr Kazuyuki Takahashi

  59. Mechanism of reversible spin transition with a thermal hysteresis loop in [FeIII(qsal)2][Ni(dmise)2] · 2CH3CN: Selenium analogue of the precursor of an Fe(III) spin-crossover molecular conducting system

    Article • Polyhedron, June 2009, Elsevier

    Dr Kazuyuki Takahashi

  60. Syntheses, crystal structures, and physical properties of copper complexes with dimethylthio-pyrazino-selenathiafulvalene (=Dmt-Pyra-STF) as ligand: trans-[CuCl2(Dmt-Pyra-STF)2] and [Cu2Br2.5(Dmt-Pyra-STF)]

    Article • Solid State Sciences, December 2008, Elsevier

    Dr Kazuyuki Takahashi

  61. Dielectric Response and Electric-Field-Induced Metastable State in an Organic Conductor β-(meso-DMBEDT-TTF)2PF6

    Article • Journal of the Physical Society of Japan, July 2008, Physical Society of Japan

    Dr Kazuyuki Takahashi

  62. Evidence of the Chemical Uniaxial Strain Effect on Electrical Conductivity in the Spin-Crossover Conducting Molecular System: [FeIII(qnal)2][Pd(dmit)2]5·Acetone

    Article • Journal of the American Chemical Society, May 2008, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  63. Intrinsic Carrier Doping in Antiferromagnetically Interacted Supramolecular Copper Complexes with (Pyrazino)tetrathiafulvalene (Pyra-TTF) as the Ligand, [CuIICl2(pyra-TTF)] and (Pyra-TTF)2[CuI3Cl

    Article • Inorganic Chemistry, April 2008, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  64. Metal−Organic Frameworks from Copper Dimers withcis- andtrans-1,4-Cyclohexanedicarboxylate andcis,cis-1,3,5-Cyclohexanetricarboxylate

    Article • Inorganic Chemistry, June 2007, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi, Hitoshi Kumagai

  65. (nBu4N)[Ni(dmstfdt)2]:  A Planar Nickel Coordination Complex with an Extended-TTF Ligand Exhibiting Metallic Conduction, Metal−Insulator Transition, and Weak Ferromagnetism

    Article • Chemistry of Materials, January 2007, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  66. Ferroelectric Porous Molecular Crystal, [Mn3(HCOO)6](C2H5OH), Exhibiting Ferrimagnetic Transition

    Article • Journal of the American Chemical Society, November 2006, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  67. Electrical Conductivity Modulation Coupled to a High-Spin−Low-Spin Conversion in the Molecular System [FeIII(qsal)2][Ni(dmit)2]3·CH3CN·H2O

    Article • Inorganic Chemistry, June 2006, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  68. Hybrid Organic−Inorganic Conductor with a Magnetic Chain Anion:  κ-BETS2[FeIII(C2O4)Cl2] [BETS = Bis(ethylenedithio)tetraselenafulvalene]

    Article • Inorganic Chemistry, March 2006, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  69. Magnetic Transitions of Single-Component Molecular Metal [Au(tmdt)2] and Its Alloy Systems

    Article • Journal of the American Chemical Society, March 2006, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  70. A Magnetic Organic Conductor Based on a π Donor with a Stable Radical and a Magnetic Anion—A Step to Magnetic Organic Metals with Two Kinds of Localized Spin Systems

    Article • Chemistry Letters, December 2005, Oxford University Press (OUP)

    Dr Kazuyuki Takahashi

  71. Organic Metals Based on an Asymmetric π Donor PEDT-TSF, (PEDT-TSF)2FeX4 (PEDT-TSF = Pyrazinoethylenedithiotetraselenafulvalene; X = Cl, Br)

    Article • Chemistry Letters, October 2005, Oxford University Press (OUP)

    Dr Kazuyuki Takahashi

  72. Dielectric Properties of Porous Molecular Crystals That Contain Polar Molecules

    Article • Angewandte Chemie, October 2005, Wiley

    Dr Kazuyuki Takahashi

  73. Control of the Optical Properties of Liquid Crystal-Infiltrated Inverse Opal Structures Using Photo Irradiation and/or an Electric Field

    Article • Chemistry of Materials, April 2005, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  74. Mechanism and relaxation kinetics of photo-induced valence tautomerism of [Co(phen)(3,5-DBSQ)2]·C6H5Cl

    Article • Journal of Photochemistry and Photobiology A Chemistry, October 2004, Elsevier

    Dr Kazuyuki Takahashi

  75. Tetrathiapentalene-type donors containing (thio)pyran-4-ylidene as a promising π-electron framework for multi-dimensional molecular conductors

    Article • Le Journal de Physique Colloques, April 2004, EDP Sciences

    Dr Kazuyuki Takahashi

  76. Novel Co complex with high transformation temperature of valence tautomerism

    Article • Journal of Photochemistry and Photobiology A Chemistry, January 2004, Elsevier

    Dr Kazuyuki Takahashi

  77. Metastable photoinduced phase of Cu(II) ethylenediamine complexes studied by x-ray-absorption fine-structure spectroscopy

    Article • Physical Review B, May 2003, American Physical Society (APS)

    Dr Kazuyuki Takahashi

  78. Reversible Valence Tautomerism Induced by a Single-Shot Laser Pulse in a Cobalt-Iron Prussian Blue Analog

    Article • Physical Review Letters, April 2003, American Physical Society (APS)

    Dr Kazuyuki Takahashi

  79. Synthesis and properties of dimeric BDT-TTP derivatives

    Article • Synthetic Metals, April 2003, Elsevier

    Dr Kazuyuki Takahashi

  80. Synthesis and properties of new extended TTP analogs

    Article • Synthetic Metals, April 2003, Elsevier

    Dr Kazuyuki Takahashi

  81. Fabrication of an Efficient Solid-State Dye-Sensitized Solar Cell

    Article • Langmuir, March 2003, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  82. An abrupt spin transition based on short S⋯S contacts in a novel Fe( ii ) complex whose ligand contains a 1,3-dithiole ring

    Article • Chemical Communications, January 2003, Royal Society of Chemistry

    Dr Kazuyuki Takahashi

  83. Control of the Optical Band Structure of Liquid Crystal Infiltrated Inverse Opal by a Photoinduced Nematic−Isotropic Phase Transition

    Article • Journal of the American Chemical Society, August 2002, American Chemical Society (ACS)

    Dr Kazuyuki Takahashi

  84. Unusually long-lived light-induced metastable state in a thermochromic copper(ii) complex

    Article • Chemical Communications, June 2002, Royal Society of Chemistry

    Dr Kazuyuki Takahashi

  85. Photo-reversible Valence Tautomerism in a Co Compound

    Article • Phase Transitions, January 2002, Taylor & Francis

    Dr Kazuyuki Takahashi

  86. Preparation and Properties of Metal Complexes with TTP-Dithiolate Ligands

    Article • Molecular Crystals and Liquid Crystals, January 2002, Taylor & Francis

    Dr Kazuyuki Takahashi

  87. Synthesis and properties of TTP analog with a cyclohexene ring inserted

    Article • Molecular Crystals and Liquid Crystals, January 2002, Taylor & Francis

    Dr Kazuyuki Takahashi

  88. Thiophene-fused DCNQI Derivatives: Their Copper Iodide Complexes as a New Family of Molecular Conductors

    Article • Phosphorus Sulfur and Silicon and the Related Elements, January 1997, Taylor & Francis

    Dr Kazuyuki Takahashi