Charge transfer complexes based on the twin-TCNQ-type acceptor 11,11,12,12,13,13,14,14-octacyano-1,4:5,8-anthradiquinotetramethane (OCNAQ).
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概要
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Charge transfer complexes of OCNAQ with pyrene, PT (phenothiazine), TMTTF (tetramethyltetrathiafulvalene), TTF (5,6 : 11,12-bis(epidithio)naphthacene), and TTF (tetrathiafulvalene) have been prepared. The pyrene and PT complexes are electrically insulating and the ground state is neutral. In most of the other complexes OCNAQ is fully charged. One of the TTT complexes, (TTT)<SUB>2</SUB>OCNAQ(DMF), where DMF is <I>N</I>,<I>N</I>-dimethylformamide, has been found to show metallic conductivity. A structural study has revealed that short S···N contacts exist between TTT and OCNAQ, in addition to one-dimensional TTT stacks. This transverse interaction has been demonstrated by the small anisotropy of the conductivity. The 2 : 1 TTF complex is also metallic down to 43 K, at which point a metal-to-insulator transition occurs. A structure analysis and thermoelectric power data suggest that the charge conduction in this crystal takes place not only through the TTF stacks but also through a two-dimensional network of the OCNAQ molecules.
- 公益社団法人 日本化学会の論文
著者
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Maruyama Yusei
Institute for Molecular Science
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Inabe Tamotsu
Institute for Molecular Science
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Mitsuhashi Tsutomu
Department of Chemistry, Faculty of Science, The University of Tokyo
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