yamochi bent_s.gif Contact Address:
       Molecular Materials Science Laboratory
       Division of Chemistry, Graduate School of Science
       Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
bent_s.gif e-mail: yamochikuchem.kyoto-u.ac.jp
bent_s.gif List of Publications >>>>> pdf format
       Conference Presentations >>> Sorry, Japanese version only

Detailed Descriptions of Researches and ....
Some documents in Japanese Language
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Research: Based on conducting charge-transfer complexes, development of new functional materials is studied.

Representative results so far obtained
         bent_s.gif For recent results, please, jump to laboratory home page in Japanese/English.

BEDT-TTF(ET) Superconductors
 In 1990s, the crystal structures and the critical temperatures (Tc's) were compared among the ambient pressure ET superconductors. The donor packing patterns were found to be governed by the patterns of openings (or hollow sites) in the anion layers. To correlate the Tc with crystal structure, the concept of the most effective space for carrier delocalization was presented, the volume which (Vmes2) showed the roughly linear correlation with Tc.


J. Am. Chem. Soc., 115(24), 11319-11327 (1993)

BEDO-TTF(BO) complexes
From participating in the first synthesis of BO, the examination of the charge-transfer complexes has been examined. As a result, the self-assembling nature of this donor molecule was found to give the stable metallic states of the complexes. Moreover, the collaboration with other research groups provided metallic thin-films; Langmuir-Blodgett films and Reticulate Doped Polymer (RDP) Films.
BO1.jpg BO2.jpg

J. Am. Chem. Soc., 118(36), 8604-8622 (1996), Synthetic Metals, 106(2), 75-83 (1999)

EDO-TTF complexes
EDO1.jpg Aiming to suppress the self-assembling nature of BO partly to afford phase transition systems, EDO-TTF, formally to lead which one of the -O-CH2-CH2-O- groups was removed from BO, has been examined. Although the self-assembling nature was completely vanished, a peculiar metal-to-insulator transition was observed in (EDO-TTF)2X (X = PF6, AsF6). This phase transition is associated with the distinct molecular deformation of the conducting component molecules, the mechanism of which shows the cooperative features of Peierls, charge-ordering, and order-disorder transition of the counter component.

J. Mater. Chem., 12(9), 2600-2602 (2002)
As for (EDO-TTF)2PF6, the collaboration with the group of Professor Koshihara proved that this complex shows the ultra-fast highly efficient photo-induced phase transition.
Science, 307, 86-89 (2005)

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