Crystal Structures and Electrical Conductivities of TXCn-TTF(X=Sulfur, Selenium, Tellurium;n=2,3)TCNQ Charge-Transfer Complexes.
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概要
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The crystal structures and the electrical conductivities have been studied for tetrakis(alkylchalcogeno)tetrathiafulvalene (TXC<I><SUB>n</SUB></I>-TTF (X=sulfur, selenium, tellurium; <I>n</I>=2,3)) complexes with tetracyanoquinodimethane (TCNQ). All the complexes with a composition of 1 : 1 had the same crystal system (triclinic) and the same space group (<I>P</I>\bar1). The donor and acceptor molecules were alternately stacked in their crystals. (TSeC<SUB>2</SUB>-TTF)TCNQ was obtained as plate and needle crystals. The molecular structure of TSeC<SUB>2</SUB>-TTF and the overlapping mode between TSeC<SUB>2</SUB>-TTF and TCNQ molecules of the two complexes were subtly different. All the complexes were semiconductors because of their mixed-stack structures. (TTeC<SUB>2</SUB>-TTF)TCNQ showed the lowest resistivity (5 Ω, cm at room temperature). Its good conductivity was brought about by the effective degree of charge-transfer and the favorable overlap between TTeC<SUB>2</SUB>-TTF and TCNQ molecules. An overall discussion on the structural and physical properties of a series of TCNQ complexes with TXC<I><SUB>n</SUB></I>-TTF (X=sulfur, selenium, tellurium; <I>n</I>=1,2,3) is presented.
- 公益社団法人 日本化学会の論文
著者
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Mori Takehiko
Institute for Molecular Science
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Inokuchi Hiroo
Institute For Molecular Science
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IMAEDA Kenichi
Institute for Molecular Science
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NAKANO Chikako
Institute for Molecular Science
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IWASAWA Naoko
Institute for Solid State Physics, The University of Tokyo
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Iwasawa Naoko
Institute For Solid State Physics The University Of Tokyo
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SAITO Gunzi
Institute for Molecular Science
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