Akihiro Otsuka 研究室

主宰者：Akihiro Otsuka

京都大学

AI 要約（直近 5 年の研究成果）

本研究室は、金属錯体と有機分子が織り成す化学的相互作用を通じて、新しい磁性物質や電子機能性物質の設計・合成に取り組んでいます。特に、フラーレン（サッカーボール型の炭素分子）、フタロシアニン（有機色素）、スピロピラン（光応答性分子）といった多様な有機化合物と遷移金属やランタノイド金属を組み合わせ、結晶性の固体化合物を創出することに注力しています。研究の中心課題は、電子受け渡しと金属配位によって分子の電子状態や磁気特性がどのように変化するかを明らかにすることです。例えば、フラーレンの一電子還元体を含む錯体系では、ラジカル状態から二量体化、さらには金属原子による架橋構造の形成まで、多段階の変換過程を観察しています。また、ランタノイド金属錯体において、磁場下での磁気弛緩現象や単分子磁石特性を調査し、磁場に応答する機能性物質の開発を進めています。同時に、有機分子の光応答性と磁性を結合させた複合材料も開発しており、光照射により磁気特性を制御できるシステムの実現を目指しています。これらの研究では、結晶構造解析、分光測定、磁化率測定、電子スピン共鳴など多角的な実験手法を駆使し、原子レベルでの構造と巨視的な物性の関連性を追求しています。得られた知見は、将来の磁性デバイスや光機能材料の開発基盤となることが期待されます。

※ AI（Claude）が、公開されている論文要旨から研究の問い・手法・主要な発見を事実情報として抽出・再構成して自動生成しています。誤りを含む可能性があるため、正確性は研究室公式情報でご確認ください。

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研究成果（47 件）

[2026] Singlet–Triplet Transitions in the Dianionic Complex of Fullerene C 60 with Iron Carbonyl: (TBA + ) 2 {[Fe 2 (CO) 6 ]-η 2 ,η 2 -C 60 } 2–
DOI: https://doi.org/10.1021/acs.inorgchem.6c00653
[2026] Coordination-driven assemblies of thioindigo and phthalocyanine chromophores: tuning optical absorption and magnetic interactions
DOI: https://doi.org/10.1016/j.dyepig.2026.113957
[2025] Complex of fullerene C60 with partial charge transfer: {(dppf)CpFe(CO)}+(C60)–⋅C6H4Cl2 (δ = 0.54–0.86), where dppf is bis(diphenylphosphino)ferrocene ligand
DOI: https://doi.org/10.1016/j.inoche.2025.116055
[2025] Formation of Singly Bonded {CpCo(CO)-η 2 -C 60 – } 2 Dimers upon the Dimerization of the CpCo(CO)-η 2 -C 60 •– Radical Anions
DOI: https://doi.org/10.1021/acs.organomet.5c00359
[2025] Salts of Tetraselenatetracene and Bis(ethylenedithio)tetrathiafulvalene with Metal Hexafluoroacetylacetonate Anions: MnII(hfac)3–, CoII(hfac)2Cl–, and PrIII(hfac)4–
DOI: https://doi.org/10.1021/acs.cgd.5c00737
[2025] Effect of the size of the substituents in triptycene (TPC-X) on the magnetic and conducting properties of the layered 2D organic metals (MDABCO+)(C60•−)(TPC-X), where X = H, Br, and I
DOI: https://doi.org/10.1016/j.synthmet.2025.117904
[2025] Complexes (TBA + ){(TMI-NPS) 2 ·Ln III I 4 } − (Ln = Dy, Tb) with two axial photochromic spiropyran ligands: photoswitching and zero-field SIM behaviour with a high magnetization blocking barrier for the Dy complex
DOI: https://doi.org/10.1039/d4qi03198a
[2025] Complexes of d‐ and f‐metal Ions with a Redox‐Active and Highly Symmetric Truxenone Ligand: Effect of Cations and Coordination on Distortions of Radical Anions and Singlet‐Triplet Transitions in Dianions
DOI: https://doi.org/10.1002/ejic.202400760
[2025] Complex of copper( <scp>ii</scp> ) hexafluoroacetylacetonate with photochromic spiropyran in the merocyanine form: field-induced slow magnetic relaxation and quantum coherence for Cu II ( S = 1/2) and photoswitching of spiropyran ligand
DOI: https://doi.org/10.1039/d5dt01129a
[2024] Effect of nuclearity and reduction state of the central ligand on magnetic properties of hexaazatrinaphthylene-based cobalt( <scp>ii</scp> ) and iron( <scp>ii</scp> ) complexes: from extremely weak to record-breaking antiferromagnetic exchange interaction
DOI: https://doi.org/10.1039/d4qi01951b

続きを表示（残り 37 件）

[2024] Coordination vs . oxidative rearrangement of photochromic spiropyrans upon reacting with Fe III Cl 3 and Fe III Br 3
DOI: https://doi.org/10.1039/d4nj02371d
[2024] Macrocycle- and metal-centered reduction of cobalt trithiadodecaazahexaphyrin (Hhp). Metal-to-ligand charge transfer in {(CoI2Co II O)(Hhp˙ 4− )} 2−
DOI: https://doi.org/10.1039/d4nj04896b
[2024] Binuclear Coordination Assemblies of Metal Tetraphenylporphyrins (M = Mn, Fe, and In) with Anionic Thioindigo Bridges as Promising Magnetic Systems with Tunable Properties
DOI: https://doi.org/10.1021/acs.inorgchem.4c02477
[2024] Single-Ion Magnetism of the [DyIII(hfac)4]− Anions in the Crystalline Semiconductor {TSeT1.5}●+[DyIII(hfac)4]− Containing Weakly Dimerized Stacks of Tetraselenatetracene
DOI: https://doi.org/10.3390/ijms25158068
[2024] Coordination complexes of reduced organic dye isoviolanthrone with transition metals and lanthanides [Mn(II), Dy(III), Gd(III), Nd(III)]
DOI: https://doi.org/10.1016/j.poly.2024.116930
[2024] Bis(ethylenedithio)tetrathiafulvalene and dibenzotetrathiafulvalene salts with dicyanoiron(III) phthalocyanine anions
DOI: https://doi.org/10.1016/j.ica.2024.121933
[2024] Slow magnetic relaxation in a complex of photochromic spiropyran in a merocyanine form and cobalt( <scp>ii</scp> ) hexafluoroacetylacetonate
DOI: https://doi.org/10.1039/d3dt04253g
[2024] Monomers and dimers of fullerenes in the radical anion salts with dyes, (astrophloxine + ) 2 (C 60 ˙ − ) 2 and (astrophloxine + ) 2 (C 70 − ) 2 : suppression of the C 60 ˙ − dimerization by π-stacking
DOI: https://doi.org/10.1039/d4nj01402b
[2023] A dimer of the negatively charged carbonyl cluster {Ir4(CO)11−}2 bonded by a single Ir−Ir bond, and comparison with the singly bonded (C60−)2 dimer.
DOI: https://doi.org/10.1002/zaac.202200368
[2023] Bimetallic neutral and anionic complexes of transition metal (Co, Mn) carbonyls with indium( <scp>iii</scp> ) phthalocyanine
DOI: https://doi.org/10.1039/d3dt01498c
[2023] Tuning the magnetic coupling between manganese porphyrins in the 2MnIITPP⋅L assemblies, where L is 6,13-pentacenequinone, isoviolanthrone2− and {MnII(triazole−)2Pc}2−. Key role of a linker (L) in magnetic exchange
DOI: https://doi.org/10.1016/j.dyepig.2023.111926
[2023] Manganese( <scp>ii</scp> ) complexes of hexaazatrinaphthylene and hexaazatrianthracene: synthesis, structure and properties
DOI: https://doi.org/10.1039/d3nj04615j
[2023] Binuclear coordination complex of open merocyanine form of photochromic spiropyran with Mn II (hfac) 2 having high spin ( S = 5) ground state
DOI: https://doi.org/10.1039/d3nj00058c
[2023] Heterotrimetallic paramagnetic complex of ring reduced tin( <scp>ii</scp> ) hexadecachlorophthalocyanine
DOI: https://doi.org/10.1039/d3nj00506b
[2023] Paramagnetic {[Fe(CO)2]2-μ2-η2:η2-η2:η2-(C60)2}2– Dimer Bridged by Iron Atoms and C–C Bonds: Effect of Starting Iron Carbonyls on Structures and Properties of Negatively Charged Iron-Bridged Fullerene Dimers
DOI: https://doi.org/10.1021/acs.inorgchem.3c02432
[2023] Crystalline Rhodium‐Tin Complexes with Radical Trianion and Tetraanion Phthalocyanine Ligands: Observation of Nimine(Pc)−Rh Coordination Bond
DOI: https://doi.org/10.1002/ejic.202300407
[2023] Synthesis, X-ray Structures, and Optical and Magnetic Properties of Cu(II) Octafluoro-octakisperfluoro(isopropyl)phthalocyanine: The Effects of Electron Addition and Fluorine Accretion
DOI: https://doi.org/10.1021/acs.inorgchem.3c00887
[2023] Molecular structure, as well as optical and magnetic properties, of coordination complexes comprising the organic dye flavanthrone with transition metals (MnII, CrIII, CrIV) and lanthanides (DyIII, GdIII)
DOI: https://doi.org/10.1016/j.dyepig.2023.111471
[2023] Synthesis, structure and properties of coordination complexes of tin( <scp>ii</scp> ) phthalocyanine and naphthalocyanine with transition metal fragments
DOI: https://doi.org/10.1039/d3ce00564j
[2023] Single-Molecule Magnets Based on Heteroleptic Terbium(III) Trisphthalocyaninate in Solvent-Free and Solvent-Containing Forms
DOI: https://doi.org/10.3390/magnetochemistry9020036
[2023] Magnetic behavior and ground spin states for coordination {L·[M II (Hal) 2 ] 3 } 3− assemblies (Hal = Cl or I) of radical trianion hexacyanohexaazatriphenylenes (L) with three coordinated high-spin Fe II ( S = 2) or Co II ( S = 3/2) centers
DOI: https://doi.org/10.1039/d3dt01571h
[2022] Negatively Charged Iron-Bridged Fullerene Dimer {Fe(CO)2-μ2-η2,η2-C60}22–
DOI: https://doi.org/10.1021/acs.inorgchem.2c03595
[2022] New HATNA(CN)6 ligand in the design of dianion magnetic assemblies with lanthanides {Cryptand(K+)}2{HATNA(CN)6·3LnIII(TMHD)3}2− (Ln = Gd, Tb and Dy)
DOI: https://doi.org/10.1016/j.poly.2022.116186
[2022] Heterospin frustration in a metal-fullerene-bonded semiconductive antiferromagnet
DOI: https://doi.org/10.1038/s41467-022-28134-w
[2022] Weak Antiferromagnetic Exchange and Ferromagnetic Alignment of FeII (S=2) Spins in Differently Charged {HAT ⋅ (FeIICl2)3}n (n=2‐ and 3‐) Assemblies of Hexaazatriphenylenes (HAT)
DOI: https://doi.org/10.1002/chem.202104165
[2022] Trinuclear coordination assemblies of low-spin dicyano manganese( <scp>ii</scp> ) ( S = 1/2) and iron( <scp>ii</scp> ) ( S = 0) phthalocyanines with manganese( <scp>ii</scp> ) acetylacetonate, tris(cyclopentadienyl)gadolinium( <scp>iii</scp> ) and neodymium( <scp>iii</scp> )
DOI: https://doi.org/10.1039/d2dt01052f
[2022] Crystalline paramagnetic supramolecular 2D-polymer of the tetra(4-pyridyl)porphyrin and terbium( <scp>iii</scp> ) complex
DOI: https://doi.org/10.1039/d2dt03170a
[2022] New Hatna(Cn)6 Ligand in the Design of Dianion Magnetic Assemblies with Lanthanides {Cryptand(K+)}2{Hatna(Cn)6⋅3lniii(Tmhd)3}2− (Ln = Gd, Tb and Dy)
DOI: https://doi.org/10.2139/ssrn.4227278
[2022] Dimerization of Negatively Charged Carbonyl Clusters. Experimental and Theoretical Investigation
DOI: https://doi.org/10.2139/ssrn.4226720
[2022] Dimerization of Negatively Charged Carbonyl Clusters. Experimental and Theoretical Investigation
DOI: https://doi.org/10.2139/ssrn.4265315
[2021] Complexes of transition metal carbonyl clusters with tin( <scp>ii</scp> ) phthalocyanine in neutral and radical anion states: methods of synthesis, structures and properties
DOI: https://doi.org/10.1039/d1dt04061h
[2021] Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid Crystals
DOI: https://doi.org/10.3390/cryst12010023
[2021] Dianionic States of Trithiadodecaazahexaphyrin Complexes with Homotrinuclear MII3O Clusters (M = Ni and Cu): Crystal Structures, Metal- Or Macrocycle-Centered Reduction, and Doublet–Quartet Transitions in the Dianions
DOI: https://doi.org/10.1021/acs.inorgchem.1c01132
[2021] Emergence of Metallic Conduction and Cobalt(II)-Based Single-Molecule Magnetism in the Same Temperature Range
DOI: https://doi.org/10.1021/jacs.1c00455
[2021] Cyclen-Containing Cylindrical Cryptand/Silver Complexes for Controlling Inclusion Ability to Alkyl Diamines
[2021] Mole-Ratio-Dependent Reversible Transformation between 2:2 and Cyclic 3:6 Silver(I) Complexes with an Argentivorous Molecule
DOI: https://doi.org/10.1021/acs.inorgchem.0c03222
[2021] Macrocycle- and metal-centered reduction of metal tetraphenylporphyrins where the metal is copper( <scp>ii</scp> ), nickel( <scp>ii</scp> ) and iron( <scp>ii</scp> )
DOI: https://doi.org/10.1039/d1dt02573b

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AI 要約（直近 5 年の研究成果）

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研究成果（47 件）

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