担当区分：責任著者   掲載種別：研究論文（学術雑誌）  

DOI： 10.1039/d3cc03198e

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1039/d3nj00289f

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担当区分：責任著者   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.20220281

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.20220191

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/acsami.2c09302

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/acs.inorgchem.1c04004

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.220064

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.210218

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.20210115

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.20200399

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Chemical Society of Japan  

DOI： 10.1246/bcsj.20200406

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/ejoc.202100039

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ejoc.202100039

出版者・発行元：Wiley  

DOI： 10.1002/ejoc.202100320

CiNii Research

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.20200357

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.210070

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1055/s-0040-1707177

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3762/bjoc.16.86

PubMed

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/cssc.202000178

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/cssc.202000178

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.tetlet.2020.151724

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.190703

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.190383

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1039/c9dt02377a

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/ejoc.201801877

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/ejoc.201900457

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1002/chem.201901030

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1002/chem.201805994

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.20180157

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/acs.orglett.8b01985

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.180371

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/slct.201700288

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.20160271

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/acs.orglett.6b02944

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.7566/JPSJ.85.094701

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/chem.201601785

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/PhysRevB.93.245136

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掲載種別：研究論文（学術雑誌）  

CiNii Research

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その他リンク： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H03798/

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.20140413

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.141182

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/ejic.201402006

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.140092

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.131231

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijms15034550

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PubMed

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.7566/JPSJ.83.015002

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.130142

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/PhysRevB.87.085117

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.130822

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DOI： 10.5517/ccznjz3

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その他リンク： http://orcid.org/0000-0002-7119-2017

記述言語：英語   掲載種別：研究論文（学術雑誌）  

We report the molecular dipole effect on conduction electrons in the title superconductor. The angular-dependent magnetoresistance has a peak for fields nearly parallel to the conducting layer, and the peak width scales as the field component perpendicular to the layer, indicating incoherent interlayer transport. However, two closed Fermi surfaces are observed in quantum oscillation. Accordingly, crystallographically independent layers have different charge densities in a bulk single crystal. The electric dipole of tetrahydrofuran gives rise to interlayer charge disproportionation. © 2012 American Physical Society.

DOI： 10.1103/PhysRevLett.109.147005

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/ja308471u

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/cryst2031092

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/ja303435n

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Tetrathiafulvalene derivatives condensed with 2-alkylidene-1,3-dithiole moiety, MeDTES (2-isopropylidene-1,3-dithiolo[4,5-d]-4,5-ethylenediselenotetrathiafulvalene), EtDTES (2-(pentan-3-ylidene)-1,3-dithiolo[4,5-d]-4,5-ethylenediselenotetrathiafulvalene), and CPDTES (2-cyclopentanylidene-1,3-dithiolo[4,5-d]-4,5-ethylenediselenotetrathiafulvalene) have been synthesized. Crystal structure analysis of MeDTES salts with Au(CN)(4)(-), ReO4-, and I-3 and a CPDTES salt with I-3 reveals that the donor-anion ratios of all salts are 1:1. Band calculation of (MeDTES)[Au(CN)(4)] suggests a quasi-one-dimensional Fermi surface that could be the result of the uniform stack of donor molecules. In spite of this stacking, the salt is a Mott insulator because of a large on-site Coulomb interaction U. (MeDTES)(ReO4)(H2O)(0.5) possesses Fermi points and exhibits semiconducting behavior with small activation energy (E-a = 0.058 eV). I-3(-) ions form disordered infinite chain in (MeDTES)(I-3)(DCE)(0.25), but those in (CPDTES)(I-3) exist as discrete ions. They show low conductivity (10(-4)-10(-2) S cm(-1)) at room temperature and the band calculation suggests that they are band insulator.

DOI： 10.3390/cryst2020393

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：IOP PUBLISHING LTD  

The temperature and polarization dependence of the optical reflectivity spectra of a quasi-one-dimensional 1/4-filled band system,. DMEDO-EBDT/2PF6, have been investigated. We observed clear anisotropy in the electronic structures corresponding to the anisotropic transport properties. The appearance of a charge gap (E-g > 0.1 eV) and transfer of the spectral weight accompanied by the metal-insulator phase transition were clearly observed. In addition, a split of the intramolecular vibrational modes was observed, which strongly suggested the existence of charge disproportionation in the low temperature phase. We also observed a photoinduced reflectivity change, which implied the occurrence of a photoinduced phase transition from the low temperature insulating phase to the high temperature metallic phase.

DOI： 10.1088/0953-8984/24/19/195501

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

A new 2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene (BDT-TTP) type donor, 2-(4,5-dimethoxy-1,3-dithiol-2-ylidene)-5-(4,5-ethylenedithio-1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene (MOET-TTP) was synthesized and its magnetic and non-magnetic anion salts (MOET-TTP)2MCl4 (M=Fe and Ga), were prepared. These salts are isostructural and belong to the space group of P1. They show metal-like behavior down to 200K for the FeCl4 salt and 20K for the GaCl4 salt. The band structures of these salts are two-dimensional. The MCl4 anions are located between the donor columns and close to the ethylenedithio and methoxy groups of the donor molecules. The magnetic susceptibilities of the FeCl4 salts follow the CurieWeiss law with Curie constant of 4.3emuKmol-1 and Weiss temperature of =-1.8K, revealing a weak antiferromagnetic interaction of 3d spins of the FeCl4 anions. The Fe center dot Fe (6.508(3) angstrom) and Cl center dot Cl (3.784.69 angstrom) distances in the crystal structure of the salt are significantly long. Therefore, the direct magnetic interaction between the 3d spins of the nearest neighboring Fe3+ ions does not seem readily accessible.

DOI： 10.1002/pssb.201100674

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

We have systematically investigated the resistive superconducting transition in the layered organic superconductor κ H-(DMEDO- TSeF) 2[Au(CN) 4](THF) [where DMEDO-TSeF is dimethyl(ethylenedioxy)tetraselenafulvalene and THF is tetrahydrofuran], which consists of two crystallographically independent conducting layers and one independent thick dielectric insulating layer. Applying a slight pressure of up to 0.35 GPa suppresses the superconducting phase. The angular dependence of the upper critical field and the short interlayer coherence length indicate that the present compound is a highly two-dimensional superconductor. The upper critical field parallel to the conducting layers exceeds the Pauli paramagnetic limit. These superconducting properties are consistent with the crystal structure in which the superconducting layers are well separated by a thick anion insulating layer. © 2012 American Physical Society.

DOI： 10.1103/PhysRevB.85.014504

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：WILEY-V C H VERLAG GMBH  

The title salt, where BSM-TTP is 2-[4,5-bis(methylseleno)-1,3-dithiol-2-ylidene]-5-(1,3-dithiol-2ylidene)-1,3,4,6-tetrathiapentalene, was prepared. The X-ray structure analysis reveals that the donors form teramerized columns, each of which is connected through an edge-to-edge chalcogen interaction. A tight-binding band calculation suggests that this salt is a semi-metal with small Fermi surfaces. Indeed, this salt exhibited high conductivity of sigma(rt) = 25 S cm(-1) at room temperature, and showed metallic conducting behaviour down to T-MI = 170 K. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.201100690

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Several derivatives of a new donor-acceptor diad 1 composed of DT-TTF and dicyanomethylidene group were synthesized. The IR spectra of 1 demonstrated considerable contribution of a polarized structure. Electronic spectra and molecular orbital calculation suggested that the absorption maximum of 1 was due to NHOMO-LUMO transition. Cyclic voltammetry revealed that the compound 1 exhibited three-stage of oxidation and one-stage of reduction processes. The bis(methylthio)-substitudted derivative 1a exhibited conductivity of 10(-6) S cm(-1) in spite of a single-component material.

DOI： 10.3987/COM-11-12277

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

Trimeric and tetrameric TTFs 1 and 2 linked alternately by methylenedithio groups were synthesized. Cyclic voltammetry and spectroelectrochemistry indicated that the dicationic state of tetrameric TTF 2 exhibited the mixed-valence state constructed not by the tetrameric TTF units but by two dimeric mutually independent TTF units.

DOI： 10.1246/cl.2011.883

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

New dimeric and trimeric TTF derivatives with methylenedithio spacers (1ab, 2a, and 2b) have been synthesized. X-ray structure analysis revealed that TTF units of the dimer 1b adopted distorted face-to-face overlapping arrangement both in intra- and intermolecular stacking. Cyclic voltammetric study indicated that trimeric 2a was in favor of taking di- and tetracationic states, while the dimeric la was in favor of taking a monocation. The absorption spectroscopic study suggested an existence of the strong face-to-face interaction particularly in di-, tri-, and tetracationic state of the trimeric TTF derivatives.

DOI： 10.1021/ol201025g

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

Novel 1,3-dithiole[4]dendralene derivatives 3 with two thiophene spacers were synthesized. Cyclic voltammetry and spectroelectrochemistry suggested the dications of most derivatives of 3 have dimeric thiophene quinoid radical cation structures, while tetramethyltetrakis(methoxycarbonyl) derivative 3Bd adopts a vinylogous TTF dication structure.

DOI： 10.1246/cl.2011.467

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The anisotropy of superconducting coherence lengths of the layered organic superconductor κL-(DMEDO-TSeF)2[Au(CN)4](THF) with domain structures has been investigated, where DMEDO-TSeF is dimethyl(ethylene-dioxy)tetraselenafulvalene and THF is tetrahydrofuran. The field angle dependence of the upper critical field and the short interlayer coherence length indicate that the present compound is a two-dimensional superconductor. Although this compound has domain walls parallel to the conducting layer depending on the orientation of the THF molecules, the interlayer coherence length shorter than the structural correlation length shows that the domain walls parallel to the conducting layers do not affect the superconductivity. ©2011 The Physical Society of Japan.

DOI： 10.1143/JPSJ.80.054706

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

Several molecular conductors based on CP-TTP, where CP-TTP is 2-(4,5-cyclopenteno-1,3-dithiol-2-ylidene)-5-(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene, have been prepared. X-ray structure analyses revealed that all the CP-TTP conductors obtained so far have beta-type array of the donors regardless of the counter anions. Among them, the ReO4- and Au(CN)(2)(-) salts exhibited metallic conducting behavior down to 10K.

DOI： 10.1246/cl.2011.452

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The Fermi surface of the layered organic superconductor κL-(DMEDO-TSeF)2[Au(CN)4](THF) has been investigated, where DMEDO-TSeF is dimethyl (ethylenedioxy) tetraselenafulvalene. Band-structure calculations show that the fundamental Fermi surface is not circular, but elliptical with an eccentricity of 0.76, leading to a large orbital overlap in the extended Brillouin zone. This symmetry is lowered by a structural phase transition at 209 K at which domains form. The magnetic breakdown orbit is observed in the Shubnikov-de Haas oscillations under the low-field region, consistent with the small energy gap at the zone boundary. The observation of the Shubnikov-de Haas effect shows that the present compound has a clean electronic system despite the domain structures. © 2011 American Physical Society.

DOI： 10.1103/PhysRevB.83.012505

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

A new tetrathiapentalene (TTP) donor 2-(4,5-dimethoxy-1,3-dithiol-2-ylidene)-5-(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene (DMO-TTP) has been synthesized, and the PF6 and AsF6 salts have also been prepared by electrochemical crystallization. X-ray structure analyses have revealed that intermolecular and intramolecular CH center dot center dot center dot O hydrogen bondings are constructed in the neutral crystal and the cation radical salts, respectively. The PF6 and AsF6 salts have a so-called A-type arrangement of the donors and show metallic behavior down to around 10 K.

DOI： 10.1246/cl.2011.81

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記述言語：日本語   出版者・発行元：基礎有機化学会（基礎有機化学連合討論会）  

テトラチアフルバレン(TTF)は分子性導体のドナー成分として知られている。高い伝導性をもたせるにはTTF間を電荷が非局在化するFace-to-Face相互作用が必要となる。本研究室では、メチレンジチオで架橋したTTFの2－4量体の合成を行い電気化学的性質について検討してきた。今回、さらに多量化した5－8量体の合成に成功し、それらのCV測定、電気化学的分光法を用いて検討したので報告する。

DOI： 10.11494/kisoyuki.2011.0.343.0

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

A new donor (ST-STP), in which tetrathiafulvalene and tetraselenafulvalene are fused, has been synthesized. This donor shows unexpectedly large on-site Coulomb repulsion compared with other bis-fused TTF systems. In (ST-STP)ReO 4, intramolecular charge disproportionation is suggested by the crystal structure and transport properties. © 2010 The Chemical Society of Japan.

DOI： 10.1246/cl.2010.1093

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

We synthesized vinylogous 4 5-ethylenedioxy-tetrathiafulvalenes (EDO-TTFs) 4 5-ethylenedioxy-2 2'-ethanediylidenebis(1 3-dithiole) (EDO-EBDT) 4 5-dimethyl-4' 5'-ethylenedioxy-2 2'-ethanediylidenebis(1 3-dithiole) (DMEDO-EBDT) 4 5-bis(thiomethyl)-4' 5'-ethylenedioxy-2 2'-ethanediylidenebis (1 3-dithiole) (BTMEDO-EBDT). and 4 5-bis(methoxycarbonyl)-4' 5'-ethylenedioxy-2 2'-ethanediylidenebis(1,3-dithiole) (BMCEDO-EBDT) The cyclic voltammograms of the vinylogous EDO-TTFs show two pairs of single-electron redox waves The first oxidation potentials (E(1)) of vinylogous EDO-TTFs are lower than those of the related TTFs, indicating that the electron donating abilities of new donors are stronger than those of the corresponding TTFs The smaller E(2)-E(1) values of new donors compared with those of the related TTFs suggest a decrease in the on-site Coulombic repulsion in the dication state X-ray crystal structure analysis of BMCEDO-EBDT reveals that the inter-molecular C-H O type hydrogen bond is constructed between the hydrogen atom and the oxygen atom of the ethylenedioxy group Single crystalline TCNQ complexes of DMEDO-EBDT and BTMEDO-EBDT have been prepared and their conducting properties and crystal structure have been investigated The TCNQ complexes of DMEDO-EBDT and BTMEDO-EBDT show low electrical conductivities (art sigma(pi) < 10(-6)S cm for (DMEDO-EBDT)(TCNQ)(chlorobenzene) and sigma(pi)=2 2 X 10(-3)S cm(-1) for (BTMEDO-EBDT)(TCNQ)) clue to DDAA-type alternate stacking (C) 2009 Elsevier B V All rights reserved

DOI： 10.1016/j.physb.2009.12.024

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JAPAN SOC APPLIED PHYSICS  

Following the previous preparation of the cyclopentane-capped tetrathiapentalene (TTP) molecule (1), we have prepared new TTP-based organic semiconductors capped with cyclobutane (2) and cyclohexane (3) units, and investigated their crystal and thin-film structures together with the field-effect transistor (FET) characteristics. The molecule capped with cyclobutane units (2) forms a uniform stacking structure extending in different directions, leading to a three-dimensional intermolecular interaction. In the crystal of the cyclohexane- capped compound (3), the S-shaped molecules stack uniformly along the crystallographic b- and c-axes, and the estimated intermolecular interaction is two dimensional. The organic FETs (OFETs) prepared by vapor deposition show markedly different mobilities, 1.3 x 10(-2) and 0.1 cm(2) V-1 s(-1) for 2 and 3, respectively, although the electrochemical properties are almost the same. The striking difference between the FET properties is attributed to the very different crystal structures of the TTP molecules depending on the terminal groups. (C) 2010 The Japan Society of Applied Physics

DOI： 10.1143/JJAP.49.01AB10

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.nima.2010.03.085

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JAPAN SOCIETY APPLIED PHYSICS  

A small dithienothiophene core compound 2,6-dihexanoyldithieno[3,2-b;2',3'-d]thiophene was synthesized and its electric properties were evaluated. The carrier mobility in the mesophase was measured by time-of-flight transient photocurrent technique. The mobility reached around 0.1 cm(2) V(-1) s(-1) for holes and 0.05 cm(2) V(-1) s(-1) for electrons, which is the highest level measured in the mesophases by time-of-flight method. The field effect mobility was evaluated for vapor-deposited thin films on an amorphous fluoropolymer insulator. Only p-type operation was observed and the hole mobility dropped to 1.5 x 10(-3) cm(2) V(-1) s(-1) due to poor injection from the source/drain electrodes. (C) 2009 The Japan Society of Applied Physics

DOI： 10.1143/APEX.2.041502

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IOP PUBLISHING LTD  

Se-77 NMR signals were observed in the metallic and insulating states of the quasi-one-dimensional organic compound (DIETSe)(2)GaCl4. The Se-77 NMR spectra at low temperatures are broadened, indicating the presence of magnetic ordering. The shape of the spectra in the magnetically ordered state is characteristic of the spin density wave (SDW) ordering. The divergent behavior of the temperature dependence of the nuclear spin-lattice relaxation rate suggests that the SDW ordering occurs at about 7 K which is lower than the metal-insulator transition temperature of 12 K.

DOI： 10.1088/1742-6596/150/4/042124

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：TAYLOR & FRANCIS LTD  

Bromo-tetracyanoazulenequinodimethanes have been synthesized by the one-pot reaction of 1,3,5-tribromoazulene with tetracyanoethylene oxide. These electron acceptors formed corresponding charge transfer complexes with tetrathiotetracene, some of which were shown to have conducting ability.

DOI： 10.1080/17415990902930390

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

Hexamethylenetetrathiafulvalene (HMTTF) derivatives substituted by tert-butyl, n-pentyl, and 1,1-dimethylpropyl groups are prepared, and the transistor properties are investigated. The compounds substituted by bulky tertiary groups exhibit high mobilities up to 0.98 cm(2)/Vs in the thin-film transistors and 2.3 cm(2)/Vs in the single-crystal transistors. At the same time these compounds realize low threshold voltages close to zero and large on-off ratios. The high mobility and the low threshold voltage are maintained more than one month in air. The single-crystal X-ray structure analyses reveal uniform stacking structures. These observations demonstrate that the low threshold voltage and the stable device performance are not solely determined by the energy levels, but are remarkably improved by the closely packed structures derived from the bulky alkyl groups.

DOI： 10.1039/b907592e

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

A study was conducted to analyze a new skeleton of organic field-effect transistors (OFET) materials, tetrathiapentalene (TTP), the compounds of which have considerably higher oxidation potentials than tetrathiafulvalene (TTF), which is expected to be advantageous to device stability. Compounds 1 and 2 were synthesized by phosphite-mediated coupling reactions of the starting material, 3 and 4, which were prepared by the Wittig reaction between a TTP-based phosphonate and the ketone. The alkyl-capped TTP molecules were obtained by a phosphite-mediated contracting-coupling reaction, in which two TTP units merged into one. Compound 2 is a high-performance OFET material, the relatively high oxidation potential of which is responsible for both stability and small threshold voltage. It is also notable that introduction of the outer ring system entirely changes the crystal and thin-film structures, and this is important in achieving the desired OFET properties.

DOI： 10.1021/cm801404d

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Structural properties of the layered organic superconductor κL - (DMEDO-TSeF)2 [Au (CN)4] (THF) have been investigated, where DMEDO-TSeF is dimethyl(ethylenedithio)tetraselenafulvalene. We have found that a structural phase transition occurs at Td =209 K, and that only the (0 0 l) Bragg reflections split into two along the b* direction below Td. The low-temperature structure is composed of two monoclinic domains with the space group P 21 n11. The low-temperature monoclinic phase has two crystallographically independent dimers in a conducting layer, suggesting that the present compound potentially borders on the checkerboard-type charge ordered state, and has possibly different symmetry of superconductivity from the ordinary κ -type superconductors. © 2007 The American Physical Society.

DOI： 10.1103/PhysRevB.76.134517

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

Five diiodo (ethylene dichalcogeno) tetrachalcogenofulvalenes, DIEDSS (2-(5,6-dihydro[1,3]diselenolo[4,5-b][1,4]diselenin-2-ylidene)-4,5-diiodo-1,3-dithiole), DIET-STF -2-(4,5-diiodo-1,3diselenol-2-ylidene)-5,6-dihydro[1,3]dithiolo[4,5-b][1,4]dithi- inel, DIEDS-STF (2-(4,5-diiodo-1,3-diselenol-2-ylidene)-5,6dihydro[1,4]diselenino[2,3-d](1,3-1-dithiole), DIEDS-STF {2-(4,5diiodo-1,3-diselenol-2-ylidene)-5,6-dihydro[1,3]diselenolo[4,5- b][1,4]dithime}, and DIEDSSe (2-(4,5-diiodo-1,3-diselenol2-ylidene)-5,6-dihydro[1,3]diselenolo[4,5-b][1,4]diselenine), have been synthesized without the use of the highly toxic reagent CSe2, and their Au(CN)(4) salts have been prepared by electrochemical oxidation. Characteristic I center dot center dot center dot N iodine bonds are constructed in all crystals, and their packing motifs are classified into two groups by the difference in the space group symmetry. The salt of DIEDSS crystallizes in the monoclinic C2/c space group and a novel helical supramolecular architecture is constructed by the strong and directional I center dot center dot center dot N iodine bond. On the other hand, the rest of the four salts crystallize in the triclinic P (1) over bar space group and their donor packing motifs belong to the so-called beta-type. Conducting properties of the -type salts strongly depend on the number and positions of the selenium atoms on the donor molecule. The salts based on the diselenadithiafulvalene (DSDTF) derivatives, DIET-STF and DIEDS-STF, show metal-semiconductor transition and the salt of fully selenated pi-donor DIEDSSe shows stable metallic behavior down to 1.6 K. On the other hand, (DIETSe)(2)[Au(CN)4] is semimetallic down to low temperature and the superconducting transition occurs at around 2 K (onset).
((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451, Weinheim, Germany, 2007)

DOI： 10.1002/ejic.200700530

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

We have found that the initial permeability mu' of Co(2)Z ferrite is improved by the substitution of Ti4+ and Zn2+ ions for Fe3+ ions. The substituted sample of Ba3Co2TixZnxFe24-2xO41 with x = 0.85 has a maximum mu' of 24, which is twice as large as that of the non-substituted sample with x = 0. The particle size and shape are changed by the substitution. This is influential in the densification and the preferential orientation of a toroidal-shape sample, which results in the improvement of mu'. (C) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jmmm.2006.10.004

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The unsymmetrical π donor dimethyl(ethylenedioxy)tetraselenafulvalene (DMEDO-TSeF) has provided six new organic superconductors with a monovalent square-planar [Au(CN)4] ion and cyclic ethers as solvent of crystallization. The six new organic superconductors κ-(DMEDOTSeF) 2[Au(CN)4](Solv.) [solv. = 1,3-dioxolane (DOL), 2,5-dihydrofuran (DHF), tetrahydropyran (THP), 1,3-dioxane (1,3-DOX), 3,4-dihydro-2Hpyran (DHP), or 1,4-dioxane (1,4DOX)] are classified into two subphases κL and κ′ according to the differen ces in their space group symmetry. κL(DMEDO-TSeF) 2[Au(CN)4](Solv.) (solv. = DOL, DHF, THP, 1,3-DOX or DHP) crystallizes in the orthorhombic space group Prima, and Tc of the κL phase varies by 1.7-5.3 K according to the size and shape of the solvent of crystallization. On the other hand, κ′ (DMEDO-TSeF)2[Au(CN)4](Solv.) (solv. = DOL or 1,4-DOX) crystallizes in the noncentrosymmetric monoclinic space group Cc. The κ′-phase containing 1,4-DOX shows superconductivity at 4.2 K, but the κ′-phase containing DOL does not show superconductivity down to 1.4 K. Systematic investigation of the six new organic superconductors, together with the two previously reported superconductors κH- and κL(DMEDO-TSeF)2[Au(CN)4](THF), revealed that the Tc of the present system is finely tunable by utilizing the effect of the solvent of crystallization. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.

DOI： 10.1002/chem.200700314

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.nima.2007.06.098

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The preparation, crystal structures, extended Hückel theory band structure, and density functional theory (DFT) calculations and conducting and magnetic properties of seven new charge-transfer salts, formulated as (D) 2[MIII(isoq)2(NCS)4], where D = DIET (diiodo(ethylenedithio)tetrathiafulvalene), DIETS (diiodo-(ethylenedithio)diselenadithiafulvalene), M = Cr, Ga, and isoq = isoquinoline, are reported. For each donor two different phases called a and b were obtained. Crystal data for (DIET)2[Cr(isoq) 2(NCS)4] (1) are as follows: phase a, triclinic P1̄, a = 9.8645(6) A, b = 10.3255(8) Å, c = 13.7712(8) Å, α = 87.905(5)°, β= 75.981(5)°, γ = 80.712(2)°; phase b, triclinic P1̄, a = 10.6760(5) Å, b= 11.3000(6) Å, c = 11.3930(9) Å, α = 101.256(2)°, β = 96.755(2)̊, γ = 97.342(5)°. All compounds exhibit semiconductive behavior with room-temperature resistivity ranging from 2 × 103 to 5 × 104 Ω cm. Donors in the mixed-valence-state form dimers. They are connected to anions through very short I⋯S contacts (S2⋯I2 = 3.248(2) Å for 1a). The magnetic measurements and spin density DFT calculations revealed that iodine atoms are good structural agents but are poor magnetic mediators to promote superexchange interactions between the donors and the inorganic anions. Our analyses reveal also that in these charge-transfer salts the magnetic interactions between spin carriers are mainly ensured by short intermolecular S-S contacts. © 2006 American Chemical Society.

DOI： 10.1021/cm052199q

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

Novel organic conductors based on four diiodotetrathiafulvalene derivatives, DIET (2-(4,5-diiodo-[1,3]dithiol-2-ylidene)-5,6-dihydro-[1,3]dithiolo[4,5-b][1,4]dithiine), DIETSe (2-(4,5-diiodo-[1,3]diselenol-2-ylidene)-5,6-dihydro-[1,3]diselenolo[4,5-b][1,4]dithiine), DIEDO (2-(4,5-diiodo-[1,3]dithiol-2-ylidene)-5,6-dihydro-[1,3]dithiolo[4,5-b][1,4]dioxine) and DIEDOSTF (2-(4,5-diiodo-[1,3]diselenol-2-ylidene)-5,6-dihydro-[1,3]dithiolo[4,5-b][1,4]dioxine) have been prepared using spherical halide ion X- (X = Cl, Br) as the counter anion. Crystal structure analyses have revealed that all halide salts contain supramolecular structures tailored by the strong I. X iodine bond and their molecular arrangement depends on the combination of the group 16 elements included in the donor molecule. The temperature dependence of the electrical resistivity of (DIET)(2)X(H2O)(2) is metallic down to 4.2 K, and they have ideally two-dimensional Fermi surfaces within the donor layer. (DIETSe)(2)X(CH2Cl2) salts show small temperature dependence of the resistivity down to low temperatures and their "double column'' structure is dominated by the Y-shaped architecture composed of the halide ion and the crystalline solvent. On the other hand, (DIEDO)(2)X and (DIEDO-STF)(2)X are semiconducting from room temperature. They have another type of "double column'' structure, i.e. the adjacent donor molecules along the side-by-side direction are solid-crossing and two types of column are included in the donor layer. The packing motifs of the halide salts based on the oxygen-substituted donor molecules are the same but their electronic states are sensitive to changes in the chalcogen atoms on the inner TTF skeleton.

DOI： 10.1039/b512036e

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

We have developed two novel organic superconductors κH- and κL-(DMEDO-TSeF)2[Au(CN)4](THF) (DMEDO-TSeF = dimethyl(ethylenedioxy)tetraselenafulvalene) with the onset transition temperatures of 4.8 K for the κH-phase and 3.0 K for the κL-phase at ambient pressure, where DMEDO-TSeF is the second example following tetramethyltetraselenafulvalene (TMTSF) after an interval of 25 years as a sulfur-free donor providing a bulk organic superconductor. © The Royal Society of Chemistry 2006.

DOI： 10.1039/b516940b

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The low temperature transport properties of the -d system (DIETSe) 2 MCl 4 [M = Fe, Ga] are investigated under the high magnetic fields and high pressures. Anomalous behaviors in the magnetic field dependence of resistance are observed in the magnetic Fe salt below about 2 K, while such anomalous behaviors are absent in the nonmagnetic Ga salt, suggesting the strong interaction between the itinerant -electrons and the localized moments of d-electrons in (DIETSe) 2 FeCl 4 .

DOI： 10.1080/15421400600698238

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Conducting cation radical salts based on a pyrazine-fused iodine-bonded π-donor diiodo(pyrazino)tetraselenafulvalene (DIPSe) and octahedral anions AF6 (A = P, As, Sb) have been prepared by electrochemical oxidation. X-Ray structure analysis revealed that these three salts are isostructural and crystallize in the hexagonal P63/mcm space group. There is a strong and directional I⋯N iodine bond among the donor molecules, which is 18-19% shorter than the sum of the van der Waals radii. The hexagonal lattice is filled with the equilateral triangles of the donor molecules tailored by the I⋯N iodine bond and there are also two types of supramolecular channels including the counter anion and the crystalline solvent. The room temperature resistivities of these three salts are in the order of 10-2 Ω cm with metallic behaviour and they show a gentle upturn at around 250 K. In addition to the high-symmetrical crystal structure and the metallic conductivity, high yield recovery of the neutral π-donor from the cation radical salts has been accomplished by a simple chemical reaction. In situ 1H-NMR monitoring of the reaction process indicates that the DIPSe cation radical was reduced by water and the characteristic supramolecular channels, which allow water molecules to access the cation radicals deep in the crystal, are essential for smooth progress of the recovery process. © The Royal Society of Chemistry 2006.

DOI： 10.1039/b611010j

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

Eight cation radical salts based on halogenated tetraselenafulvalene (TSeF) derivatives, dibromo( ethylenedithio) tetraselenafulvalene (DBrETSe) and diiodo( ethylenedithio) tetraselenafulvalene (DIETSe), were prepared using magnetic and nonmagnetic MX4 counter anions ( M = Fe, Ga; X = Cl, Br). Crystal structures of the DBrETSe salts depend on the halogen species on the MX4 counter anion. The MCl4 salts of DBrETSe are isostructural and crystallize in the orthorhombic space group Ibam and those of the MBr4 salts crystallize in the monoclinic space group C2/c. On the other hand, all four MX4 salts of DIETSe are isostructural and crystallize in the orthorhombic space group Ibam. In all eight crystals, donor molecules form a so-called beta-type molecular arrangement and characteristic halogen bonds between the halogen atoms on the edge of the donor molecules and those of the counter anions are observed. (DBrETSe)(2)MX4 (M = Fe, Ga; X = Cl, Br) show stable metallic behaviour down to 4.2 K. This is in contrast to their iodinated analogues (DIETSe)(2)MCl4 (M = Fe, Ga), which show a metal - semiconductor transition at 11 K for the FeCl4 salt and at 12 K for the GaCl4 salt. No metal - semiconductor transition is observed for (DIETSe)(2)GaBr4, which contains the nonmagnetic anion, but the transition is observed at 7.2 K for the corresponding FeBr4 salt, which contains a magnetic anion, indicating that the metal - semiconductor transition of ( DIETSe)(2)FeBr4 correlates to the pi - d electronic interaction through the I center dot center dot center dot Br halogen bonds. Antiferromagnetic orderings of d spins of the FeX4 anions are observed in (DBrETSe)(2)FeX4 and (DIETSe)(2)FeX4 (X = Cl, Br). In contrast to the low Neel temperature (T-N approximate to 2.5 K) of the FeCl4 salts, the antiferromagnetic orderings occur at relatively high temperatures, i.e. T-N = 7.5 K for (DBrETSe)(2)FeBr4 and T-N = 7.0 K for (DIETSe)(2)FeBr4. Since the metallic state of (DBrETSe)(2)FeBr4 remains below T-N, this salt is classified as a novel antiferromagnetic organic metal. On the other hand, the antiferromagnetic ordering of the d spins in (DIETSe)(2)FeBr4 takes place cooperatively with the metal - semiconductor transition around 7 K. These antiferromagnetic orderings of the d spins between the FeX4 anions cannot be explained by direct anion - anion interactions because of their long halogen. halogen distances between the FeX4 anions, and the importance of the pi - d interaction between the donors and the counter anions through the halogen bonds is strongly suggested.

DOI： 10.1039/b605420j

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：TAYLOR & FRANCIS LTD  

Synthesis, crystal structure and physical properties of k-(BEDO-TSeF) I-2(3), (1) are reported. 1 is the first example of a cation radical salt based on BEDO-TSeF, which is the latest chalcogen analogue of BEDT-TTF.

DOI： 10.1080/15421400600697883

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：TAYLOR & FRANCIS LTD  

DOI： 10.1080/10426500590913249

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

A novel unsymmetrical tetraselenafulvalene (TSeF)-type donor dimethyl( ethylenedioxy) tetraselenafulvalene (DMEDO-TSeF) has been synthesized without the use of the highly toxic reagent CSe2 and the structures and properties of its cation radical salts with octahedral anions are described.

DOI： 10.1039/b511820d

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ACADEMIC PRESS INC ELSEVIER SCIENCE  

A novel conjugation-elongated bis(ethylenedithio)tetraselenafulvalene (BETS) type donor, 2,5-bis(4,5-ethylenedithio-1,3-diselenol-2-ylidene)-2,3,4,5-tetrahydrothiophene (BEDT-HBDST) and its magnetic and non-magnetic anion salts, (BEDT-HBDST)(2)MX4 (MX4- = FeCl4-, GaCl4-, FeBr4- and GaBr4-), were prepared. These four salts are isostructural and belong to the space group of P2/c. They showed semiconducting behavior with small activation energies (59-64 meV). The band structures of these salts are quasi one-dimensional and there is a midgap between the upper band and the lower band, since the degree of dimerization is significant in the stacking direction. The MX4- ions are located between the donor columns and near to the ethylenedithio moieties of the donor molecules. The magnetic susceptibilities of the FeCl4- and FeBr4- salts follow the Curie-Weiss law with Curie constants of 4.6 and 4.8 emu K mol(-1) (sum of the spins of S = 5/2 and S = 1/2) and negative Weiss temperatures of theta = -1.2 and -4.9 K, respectively, revealing a weak antiferromagnetic interaction of 3d spins of the FeCl4- and FeBr4- anions. The (FeFe)-Fe-... (6.66-7.60 Angstrom), (ClCl)-Cl-... (4.81-4.82 Angstrom) and (BrBr)-Br-... (4.74-4.77 Angstrom) distances in the crystal structures of these salts are significantly long. Therefore, the direct magnetic interaction between the 3d spins of the nearest neighboring Fe3+ ions appears to be not readily accessible. (C) 2003 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.jssc.2003.08.030

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1143/JPSJ.73.254

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

Bis(ethylenedioxy)tetraselenafulvalene (BEDO-TSeF) has been synthesized using elemental selenium as the only source of the selenium atoms, and its crystal structure and electrochemical properties are examined and compared with its sulfur analogues.

DOI： 10.1039/b403559c

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

Novel selenium analogues of diiodo(ethylenedithio)-diselenadithiafulvalene (DIETS) have been successfully derived from 1,3-diselenole-2-thione, which could be synthesized without the use of the highly toxic reagent CSe2.

DOI： 10.1039/b406092j

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

The iodine-based intermolecular interaction, i.e. iodine bond is highly useful for structure control of organic conductors and a wide variety of supramolecular conductors including a superconductor have been developed. In this paper, we focus our attention on exotic iodinated donor molecules DIETS (diiodo(ethylenedithio)diselenadithiafulvalene) and DIETSe (diiodo(ethylenedithio)tetraselenafulvalene). Syntheses, structure and electronic properties of a supramolecular superconductor and a new series of organic metals are reported together with an outline of the iodine bonding architecture.

DOI： 10.1016/S0379-6779(02)00786-5

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

We present the low-temperature crystal structures of (BDTFP)(2)PF6 and (BDTFP)(2)AsF6 below the phase transition temperatures (T-p). In the former compound, the c-axis is doubled and thus the dimerized structure changed into a tetramerized structure. At the same time, a new charge-transfer (CT) transition appears at 7000-8000 cm(-1). These two findings are consistent with the non-magnetic state below T-p. In the latter, on the other hand, the dimerized structure is maintained below T-p, and instead AsF6 ion rotates along with the ca. 10degrees rotation of BDTFP. This structural change is the origin of the first-order phase transition to a paramagnetic state. (C) 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0379-6779(02)00298-9

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

We have synthesized novel selenium-containing π-extended donors, BEDT-HBDST and BEDT-HSTT. The PF6, AsF6 and SbF6 salts of BEDT-HBDST showed broad ρmax at around 120, 95 and 85 K, respectively, and metallic behavior down to 2 K. The quasi-one-dimensional metallic band structures are calculated for the PF6 and AsF6 salts of BEDT-HSTT with an α′-type donor arrangement, although these salts showed semiconducting behavior. © 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0379-6779(02)00377-6

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s00259-003-1301-3

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

We developed a new CSe2-free protocol for the synthesis of [1,3]diselenole-2-thione and converted it to tetraselenafulvalene derivatives without any selenium-sulfur exchange side reactions.

DOI： 10.1039/b304136k

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

N, N′-Dicyano-p-acepleiadylenequinonediimine (DCNAPQ-DI) and its 1,2-dibromo derivative (Br2-DCNAPQ-DI), a new family of acepleiadylene-based DCNQI type electron acceptors have been synthesized. Br2-DCNAPQDI exhibiting the first half-wave reduction potential of -0.03 V vs SCE afforded a fairly high conducting Cu salt.

DOI： 10.1246/cl.2002.1004

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PHYSICAL SOC JAPAN  

ESR and H-1-NMR investigations of the quasi-one-dimensional organic conductors, (BDTFP)(2)X(PhCl)(0.5) (X = PF6, AsF6), were carried out. The low-temperature physical properties of the title compounds are quite different from each other, although those at R.T. are very similar. The PF6 salt undergoes a spin-singlet transition around 170 K. On the other hand, the AsF6 salt shows a discontinuous transition of first order around 230 K, in association with an abrupt jump in the spin susceptibility. The AsF6 salt shows spin-gap behavior below 50 K, but it undergoes an antiferromagnetic transition at 14 K. The low-temperature electronic states of the title Compounds are discussed by microscopic point of view.

DOI： 10.1143/JPSJ.71.2022

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/PhysRevB.65.024402

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：TAYLOR & FRANCIS LTD  

A new dihydrothiophene-extended BEDO-TTF (130) type donor, BO-HBDTT, was synthesized by a convenient method and gave metallic ClO4, BF4, and PF6 salts. Of these the ClO4 salt with beta" type donor arrangement showed two-dimensional metallic behavior and relatively narrow band width.

DOI： 10.1080/10587250210803

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：TAYLOR & FRANCIS LTD  

Magnetic investigation was carried out for quasi-one-dimensional organic conductors, (BDTFP)(2)X(PHCl)(0.5) (X=AsF6, PF6). They show Metal-Insulator transitions at low temperatures. To clarify the mechanism of the transitions, we performed ESR and NMR measurements. The low temperature electronic states of the title compounds are discussed by a microscopic point of view.

DOI： 10.1080/10587250210801

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掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

We present the low-temperature crystal structures of (BDTFP)(2)PF6 and (BDTFP)(2)AsF6 below the phase transition temperatures (T-p). In the former compound, the c-axis is doubled, and the dimerized structure is therefore changed into a tetramerized structure. At the same time, a new charge-transfer transition appears at ca. 7000-8000 cm(-1). These two findings are consistent with the non-magnetic state below T-p. In the latter compound, on the other hand, the dimerized structure is maintained below T-p, and the AsF6 ion rotates along with the ca. 10degrees rotation of BDTFP. This structural change is the origin of the first-order phase transition to a paramagnetic state.

DOI： 10.1039/b202259c

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Crystal structures and electronic properties of [BO-HBDTT][PF6] and [BO-HBDTT]4[PF6] have been clarified. The donor packing patterns in these salts can be basically classified into α1-type, in which the donor stacks in the twisted overlap mode regarding the 1,3-dithiole rings. Intrastack intermolecular C-H⋯O contacts play an important role in the metallic nature of [BO-HBDTT]4[PF6].

DOI： 10.1246/cl.2001.514

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

2,5-Bis(4,5-ethylenedithio-1,3-dithiol-2-yliden)-2,5-dihydroselenophene (BEDT-BDTS), a selenophenoquinonoid-extended analogue of bis(ethylenedithio) tetrathiafulvalenes (BEDT-TTF), has been synthesized as a promising candidate for an electron-donating component of high T-c ,organic superconductors. BEDT-BDTS is air-stable and has a significantly enhanced electron-donating ability compared with that of BEDT-TTF. The molecular and crystal structures of BEDT-BDTS have been determined by single crystal X-ray analysis in which short intermolecular: S ... S contacts have been found in the side-by-side directions of the donor arrangements. A 1:1 TCNQ complex and a 3:1 I,(-)(3) radical cation salt of BEDT-BDTS have been obtained and proved to exhibit fairly high room temperature conductivities.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

2,5-Bis(4,5-ethylenedithio-1,3-dithiol-2-ylidene (BEDT-BDTS), a selenophenoquinonoid-extended analogue of bis(ethylenedithio) tetrathiafulvalenes (BEDT-TTF), has been synthesized as a promising candidate for an electron-donating component of high T-c organic superconductors. BEDT-BDTS is air-stable and has a significantly enhanced electron-donating ability compared with that of BEDT-TTF. The molecular and crystal structures of BEDT-BDTS have been determined by single crystal X-ray analysis in which short intermolecular S ... S contacts have been found in the side-by-side directions of the donor arrangements. A 1 : 1 TCNQ complex and a 3 : 1 I-3(-) radical cation salt of BEDT-BDTS have been obtained and proved to exhibit fairly high room temperature conductivities.

DOI： 10.1039/a703428h

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

2,5-Bis(1,3-dithiol-2-ylidene)-2,5-dihydroselenophene (BDTS) and its ethylenedithio (EDT-BDTS) and bis(ethylenedithio) (BEDT-BDTS) derivatives, novel extended donors with a central selenium atom, have been synthesized by convenient methods. Of these, EDT-BDTS and BEDT-BDTS having outer chalcogen atoms afforded highly conducting molecular complexes with TCNQ (sigma=13 Scm(-1) on a compressed pellet).

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：口頭発表（一般）  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：口頭発表（一般）  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：口頭発表（一般）  

researchmap

記述言語：日本語   会議種別：口頭発表（一般）  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：ポスター発表  

researchmap

記述言語：日本語   会議種別：口頭発表（一般）  

researchmap

記述言語：日本語   会議種別：ポスター発表  

researchmap

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

記述言語：日本語   会議種別：口頭発表（一般）  

researchmap

記述言語：日本語   会議種別：口頭発表（一般）  

researchmap