Molecular Design and Physical Properties of Single-Component Molecular Metals
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概要
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The design of metallic crystals consisting of single-component molecules (single-component molecular metal) is explained on the basis of the examinations of frontier molecular orbitals and the simple extended-Huckel tight-binding band pictures. To meet the conditions required to realize automatic carrier generation by self-assembly of the same kind of neutral molecules, a crystal of a transition metal complex molecule [Ni(tmdt)_2] with extended-TTF-type (TTF=tetrathiafulvalene) dithiolate ligands was synthesized, which was found to be the first single-component molecular metal. The X-ray structure analyses of the crystals of [(C_4H_9)_4N]_2[Ni(tmdt)_2] and neutral [Ni(tmdt)_2] provided information on the symmetry of the frontier molecular orbitals [the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO)] from which the metallic bands are formed. The infrared and visible spectra of a crystalline powder sample of [Ni(tmdt)_2] showed a broad electronic absorption maximum at around 2200cm^<-1>, suggesting an extremely small HOMO-LUMO gap. The physical properties of some of the hitherto-developed single-component molecular conductors are also briefly described.
- 社団法人日本物理学会の論文
- 2006-05-15
著者
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OKANO Yoshinori
Institute for Molecular Science, and CREST, Japan Science and Technology Agency
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KOBAYASHI Hayao
Institute for Molecular Science, and CREST, Japan Science and Technology Agency
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KOBAYASHI Akiko
Research Centre for Spectrochemistry, Graduate School of Science, The University of Tokyo
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Kobayashi A
Department Of Humanities And Sciences Nihon University
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Kuroda H
Institute For Solid State Physics University Of Tokyo
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Kobayashi Akiko
Research Centre For Spectrochemistry Graduate School Of Science University Of Tokyo:department Of Ch
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Okano Yoshinori
Institute For Molecular Science
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Okano Yoshinori
Institute For Molecular Science And Crest Jst
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Kurai Hiroyuki
Department Of Organic And Polymeric Materials Tokyo Institute Of Technology
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Kobayashi H
Department Of Chemistry College Of Humanities And Sciences Nihon University
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Kobayashi Hayao
Institute For Molecular Science
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Kobayashi H
Department Of Chemistry And Materials Technology Kyoto Institute Of Technology
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Kobayashi Akiko
Department Of Chemistry College Of Humanities And Sciences Nihon University
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Kobayashi Hayao
Crest-jst:department Of Chemistry College Of Humanities And Sciences Nihon University:institute For
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Kobayashi H
Institute For Molecular Science
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Kobayashi Hayao
Institute For Molecular Science And Crest Jst
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Kobayashi A
Research Centre For Spectrochemistry The University Of Tokyo
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Kobayashi Akiko
Research Center For Spectrochemistry Graduate School Of Science The University Of Tokyo
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Kobayashi Akiko
Research Centre For Spectrochemistry Graduate School Of Science The University Of Tokyo
関連論文
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