Low-temperature reflection spectra of the single crystals of TCNQ complex salts.
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概要
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The visible and near-infrared reflection spectra were measured, at temperatures in the range of 27–300 K, on the single crystals of (<I>N</I>-ethyl-1,10-phenanthrolinium)(TCNQ)<SUB>2</SUB>, (methyltriphenylphosphonium)(TCNQ)<SUB>2</SUB> and Cs<SUB>2</SUB>(TCNQ)<SUB>3</SUB>. We found that the dispersion observed at about (10–11)×10<SUP>3</SUP> cm<SUP>−1</SUP> in the reflection spectra of the former two salts is due to the local excitation associated with the lowest π-π transition of (TCNQ)<SUP>−</SUP>. A new dispersion attributable to intermolecular charge transfer was found to appear at (7–8)×10<SUP>3</SUP> cm<SUP>−1</SUP> in the spectrum of (methyltriphenylphosphonium)(TCNQ)<SUB>2</SUB>, at low temperature. In the case of Cs<SUB>2</SUB>(TCNQ)<SUB>3</SUB>, the low-temperature spectrum showed that there are two dispersions in the range of (8–14)×10<SUP>3</SUP> cm<SUP>−1</SUP>, one of which being attributable to the charge transfer between (TCNQ)<SUP>−</SUP> ions and the other to the local excitation associated with (TCNQ)<SUP>−</SUP>. We propose a new interpretation for the spectra of TCNQ complex salts on the basis of these new experimental data.
- 公益社団法人 日本化学会の論文
著者
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Yakushi Kyuya
Department Of Chemistry Faculty Of Science University Of Tokyo
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Ohta Toshiaki
Department Of Chemistry Faculty Of Science University Of Tokyo
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Kusaka Takahisa
Department of Chemistry, Faculty of Science, The University of Tokyo
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Kuroda Haruo
Department of Chemistry and Research Center for Spectrochemistry, Faculty of Science, The University of Tokyo
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Iguchi Masaaki
Department of Chemistry, Faculty of Science, The University of Tokyo
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Katagiri Gen
Department of Chemistry, Faculty of Science, The University of Tokyo
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