The C=C Stretching Vibrations of κ-(BEDT–TTF)2Cu[N(CN)2]Br and Its Isotope Analogues
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概要
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The C=C stretching modes in resonance Raman spectra and infrared reflectivity were measured at temperatures between 15 K and 300 K using various polarizations in κ-(BEDT–TTF)2Cu[N(CN)2]Br, its fully and partially deuterated analogues, and 13C-substituted analogue. The infrared- and Raman-active bands were re-assigned based on the factor group analysis. We found a Raman-active EMV-coupled ν3 mode near 1420 cm-1, which shows a large downshift and broadening through the inter-dimer EMV interaction. The mixing of the bridge and ring C=C stretching vibrations depend upon the symmetry of the crystal mode. In contrast to deuterated crystals, the non-deuterated crystals show a splitting in the ν2, ν3, and ν27 bands.
- 2001-12-15
著者
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YAKUSHI kyuya
Institute for Molecular Science
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Taniguchi Hiromi
Department Of Applied Physics The University Of Tokyo
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Kanoda Kazushi
Department Of Applied Physics The University Of Tokyo
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MAKSIMUK Mikhail
Institute for Molecular Science
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Kawamoto Atsushi
Department of Biology, Faculty of Science, Chiba University
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Yakushi Kyuya
Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444-8585
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Taniguchi Hiromi
Department of Applied Physics, The University of Tokyo Hongo, Tokyo 113-0033
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