Solvent inclusion effects on the structure and electrical conductivity of benzidine-TCNQ complex.
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概要
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The solvent-containing modification of benzidine (BD)-tetracyanoquinodimethane (TCNQ) complex is a new type of inclusion compound where solvent molecules are included in the channels of the host lattice formed by hydrogen bonding and charge-transfer interaction between BD and TCNQ. The electrical conductivity at 18 °C is 7×10<SUP>−10</SUP> ohm<SUP>−1</SUP>·cm<SUP>−1</SUP> and the activation energy of semiconduction is 0.54 eV in the solvent-free state, but they change to 10<SUP>−4</SUP>–10<SUP>−6</SUP> ohm<SUP>−1</SUP>·cm<SUP>−1</SUP> and 0.1–0.2 eV, respectively, when an aliphatic solvent is included, and to 10<SUP>−6</SUP>–10<SUP>−9</SUP> ohm<SUP>−1</SUP>·cm<SUP>−1</SUP> and 0.3–0.5 eV, when benzene or its derivatives is included. By examining the changes of the electrical conductivity and the spin density of BD·TCNQ·[CH<SUB>2</SUB>Cl<SUB>2</SUB>] system with the pressure change of the ambient dichloromethane vapor, it is concluded that the conductivity of BD·TCNQ·[CH<SUB>2</SUB>Cl<SUB>2</SUB>] is strongly controlled by the amount of solvent vacancies in the crystal lattice. The correlations between the electrical properties and crystal structures of solvent-containing modifications are discussed.
- 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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Ishii Kikujiro
Department Of Chemistry Faculty Of Science Gakushuin University
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Takahashi Noriaki
Department of Chemistry, Faculty of Science, 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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Yakushi Kyuya
Department of Chemistry, Faculty of Science, University of Tokyo
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