A5080965890- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Crystallography and molecular interactions
- Porphyrin and Phthalocyanine Chemistry
- Solid-state spectroscopy and crystallography
- Metal-Catalyzed Oxygenation Mechanisms
- Fullerene Chemistry and Applications
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Synthesis and Properties of Aromatic Compounds
- Molecular Junctions and Nanostructures
- Perovskite Materials and Applications
- Physics of Superconductivity and Magnetism
- Inorganic Fluorides and Related Compounds
- Inorganic Chemistry and Materials
- Graphene research and applications
- Organometallic Complex Synthesis and Catalysis
- Lanthanide and Transition Metal Complexes
- Photochemistry and Electron Transfer Studies
- Advanced Condensed Matter Physics
- Advanced Chemical Physics Studies
- Electron Spin Resonance Studies
- Rare-earth and actinide compounds
- Organic Chemistry Cycloaddition Reactions
Kyoto University
2016-2025
Royal Society of Chemistry
2024
Centre National pour la Recherche Scientifique et Technique (CNRST)
2024
Graduate School USA
2016-2020
Max Planck Institute for the Structure and Dynamics of Matter
2019
Division of Chemistry
2017
Meijo University
2016
Tokyo Metropolitan University
2016
Ehime University
2016
Ricoh (Japan)
2016
Muon-spin-relaxation and bulk measurements of the magnetic-field penetration depth suggest that cuprate high-${\mathit{T}}_{\mathit{c}}$, bismuthate, organic Chevrel-phase, heavy-fermion systems possibly belong to a unique group superconductors characterized by high transition temperatures ${\mathit{T}}_{\mathit{c}}$ relative values ${\mathit{n}}_{\mathit{s}}$/${\mathit{m}}^{\mathrm{*}}$ (carrier density/effective mass). This feature distinguishes these exotic from ordinary BCS superconductors.
Abstract An ambient pressure superconductivity of (BEDT-TTF)2Cu(SCN)2 was observed by d.c. magnetic susceptibility and electrical conductivity measurements. The superconducting critical temperature is the highest (TC=10.4 K) among organic superconductors so far obtained, even though anion has a positional disorder in crystal.
The Shubnikov-de Haas (SdH) effect has been observed in the recently discovered ambient-pressure organic superconductor...
We report that the organic salt (EDO-TTF)2PF6 with 3/4-filled-band (1/4-filled in terms of holes), which forms an metal strong electron and lattice correlation, shows a highly sensitive response to photoexcitation. An ultrafast, photoinduced phase transition from insulator can be induced very weak excitation intensity at near room temperature. This makes material attractive for applications switching devices room-temperature operation. The observed photo-induced spectroscopic change this...
The complex formation of bis(ethylenedioxy)tetrathiafulvalene (BEDO-TTF) with 29 organic electron acceptors and six anions yielded 37 charge-transfer (CT) complexes, about three-quarters which exhibited metallic behavior. BEDO-TTF molecule proves to be an excellent source for stable metals irrespective the structure, shape, size, affinity counter components. crystal structure complexes indicates a strong aggregation donor molecules into two-dimensional (2D) layered by aid both intermolecular...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBis(ethylenedioxy)tetrathiafulvalene: the first oxygen substituted tetrathiafulvaleneT. Suzuki, H. Yamochi, G. Srdanov, K. Hinkelmann, and F. WudlCite this: J. Am. Chem. Soc. 1989, 111, 8, 3108–3109Publication Date (Print):April 1, 1989Publication History Published online1 May 2002Published inissue 1 April 1989https://pubs.acs.org/doi/10.1021/ja00190a079https://doi.org/10.1021/ja00190a079research-articleACS PublicationsRequest reuse...
Abstract The crystal structures of an organic superconductor (BEDT-TTF)2Cu(NCS)2 (Tc=10.4 K) at 298 K and 104 are determined by X-ray analysis. packing pattern donors is nearly analogous to κ-(BEDT-TTF)2I3. counter anion, Cu(NCS)2−, has no positional disorder constructs a peculiar sheet where copper ion coordinated with sulfur two nitrogen atoms form one-dimensional polymer permanent dipole moment.
Hydrogen-bond interaction in donor-acceptor charge-transfer complexes of TTF-imidazole demonstrated the electronic effects terms control component ratio and redox activation. These unprecedented hydrogen bonds renewed criteria giving "a high probability being organic metals" produced a number highly conductive with various acceptors having wide range electron-accepting ability. In p-chloranil complex, both molecules were linked by formed D-A-D triad, regulating composition to be 2:1....
The magnetic-field penetration depth \ensuremath{\lambda} in the organic superconductors \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$ Cu(NCS${)}_{2}$ and Cu[N(CN${)}_{2}$]Br has been measured over a wide temperature region 20 mK\ensuremath{\le}T\ensuremath{\le}15 K via muon-spin-relaxation technique. Linear variation of with T at low temperatures, found both systems, is consistent anisotropic superconducting pairings line nodes energy gap. In latter compound, we observe flux depinning...
An upper critical field measurement in the recently discovered ambient pressure organic superconductor (BEDT-TTF) 2 Cu(NCS) ( T c =10.4K) is reported. Three- to two-dimensional crossover behaviour observed temperature dependence of parallel field. The anisotropy coherence length near , ξ /ξ a * about 19 and (0) smaller than lattice spacing along -axis. unusual perpendicular far below . It confirmed that deuterated salt also an with slightly higher (11 K).
The effects of pressure on a quantum spin liquid are investigated in an organic Mott insulator $\ensuremath{\kappa}\text{\ensuremath{-}}(\mathrm{ET}{)}_{2}{\mathrm{Ag}}_{2}(\mathrm{CN}{)}_{3}$ with spin-$1/2$ triangular lattice. application negative chemical to $\ensuremath{\kappa}\text{\ensuremath{-}}(\mathrm{ET}{)}_{2}{\mathrm{Cu}}_{2}(\mathrm{CN}{)}_{3}$, which is well-known sister insulator, allows for extensive tuning antiferromagnetic exchange coupling, $J/{k}_{B}=175--310\text{...
Radical anion salts of metal-containing and metal-free phthalocyanines [MPc(3-)](·-), where M = Cu(II), Ni(II), H2, Sn(II), Pb(II), Ti(IV)O, V(IV)O (1-10) with tetraalkylammonium cations have been obtained as single crystals by phthalocyanine reduction sodium fluorenone ketyl. Their formation is accompanied the Pc ligand affects molecular structure metal radical anions well their optical magnetic properties. are characterized alternation short long C-Nimine bonds in owing to disruption its...
Lower oxidation potentials than for the monomeric starting materials are displayed by diporphyrins obtained one-electron with tris(4-bromophenyl)ammonium hexachloroantimonate [see, example, Eq. (1)]. This and strong red shift observed Soret bands of product indicative extensively delocalized pi-electron systems in fused diporphyrin. Ar=3,5-di-tert-butylphenyl.
(EDO-TTF)2PF6 shows a novel metal–insulator phase transition, which complies with the cooperative features of Peierls charge ordering, and anion ordering.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural aspects of the ambient-pressure BEDT-TTF superconductorsHideki Yamochi, Tokutaro Komatsu, Nozomu Matsukawa, Gunzi Saito, Takehiko Mori, Masami Kusunoki, and Kenichi SakaguchiCite this: J. Am. Chem. Soc. 1993, 115, 24, 11319–11327Publication Date (Print):December 1, 1993Publication History Published online1 May 2002Published inissue 1 December...
Modification of tetrathiafulvalene with an imidazolyl substituent as a hydrogen-bond donor allows the generation hydrogen-bonded 2:1 charge-transfer complex chloranil. This forms three-dimensional network columnar stacking each component and multiple S⋅⋅⋅S interactions (see picture). strongly purely organic conducting material is first to display metallic behavior. Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2004/z460801_s.pdf or...
The quasistable state in the photoinduced phase transition for quasi-one-dimensional quarter-filled organic conductor $(\mathrm{EDO}\mathrm{\text{\ensuremath{-}}}\mathrm{TTF}{)}_{2}{\mathrm{PF}}_{6}$ has been examined by ultrafast reflective measurements and time-dependent model calculations incorporating both electron-electron electron-phonon interactions. transient optical conductivity spectrum over a wide probe photon-energy range revealed that photoexcitation induced new type of...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT(BEDO)2.4I3: the first robust organic metal of BEDO-TTFFred Wudl, H. Yamochi, T. Suzuki, Isotalo, C. Fite, Kasmai, K. Liou, G. Srdanov, P. Coppens, and Cite this: J. Am. Chem. Soc. 1990, 112, 6, 2461–2462Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue 1 March 1990https://pubs.acs.org/doi/10.1021/ja00162a080https://doi.org/10.1021/ja00162a080research-articleACS PublicationsRequest reuse...
We grew large single crystals of the cluster magnet Nb3Cl8 with a magnetic triangular lattice and investigated its properties crystal structure. In Nb3Cl8, [Nb3]8+ has unpaired spin, making it an S = 1/2 anti-ferromagnet. At low temperatures, exhibits magnetic-nonmagnetic phase transition driven by charge disproportionation, in which paramagnetic clusters transform into alternating layers nonmagnetic [Nb3]7+ [Nb3]9+ clusters. The observed exotic phenomenon strong correlation between...
Radical anion salts of metal phthalocyanines (M = Cu<sup>II</sup>, Pb<sup>II</sup>, V<sup>IV</sup>O and Sn<sup>IV</sup>Cl<sub>2</sub>) with the {cryptand(Na<sup>+</sup>)} cations have been obtained studied.
Single-molecule magnets exhibit magnetic bistabililties at the molecular level, making them promising for molecule-based spintronics due to high densities. The incorporation of SMM behavior and electrical conductivity in one compound is rare because these two physical properties often do not operate same temperature range, which further hinders their use practical applications. Here we present an organic–inorganic hybrid, β″-(BEDO-TTF)3[Co(pdms)2]·(MeCN)(H2O)2 (BO3) (BEDO-TTF =...
We present the electronic and vibrational spectra of quasi-one-dimensional $\frac{3}{4}$-filled ${(\mathrm{EDO}\text{\ensuremath{-}}\mathrm{TTF})}_{2}X$ ($\mathrm{EDO}\text{\ensuremath{-}}\mathrm{TTF}=\text{ethylenedioxy-tetrathiafulvalene}$, $X={\mathrm{PF}}_{6}$ ${\mathrm{AsF}}_{6}$) above below metal-insulator phase transition (${T}_{\mathrm{MI}}=280\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for ${\mathrm{PF}}_{6}$ salt $268\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ ${\mathrm{AsF}}_{6}$ salt)....