Crystal structures and electrical properties of TSeCn-TTF(n=2 and 4).

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概要

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• An organic compound TSeC<I><SUB>n</SUB></I>-TTF [tetrakis(alkylseleno) tetrathiafulvalenes] with <I>n</I>=2, crystallizes in the monoclinic space group <I>P</I>2<SUB>1</SUB>⁄<I>a</I>, <I>a</I>=23.218(5), <I>b</I>=8.960(3), <I>c</I>=10.489(3) Å, β=96.61(2)°, <I>V</I>=2168(1) Å<SUP>3</SUP>, and <I>Z</I>=4; the compound with <I>n</I>=4 crystallizes in the triclinic space group <I>P</I>\bar1, <I>a</I>=9.198(1), <I>b</I>=10.539(2), <I>c</I>=8.248(2) Å, α=113.16(2), β=96.02(2), γ=90.61(2)°, <I>V</I>=729.9(3) Å<SUP>3</SUP> and <I>Z</I>=1. The molecule with <I>n</I>=2 has a bent structure, like a boat; and the molecule with <I>n</I>=4 has a structure in which each of the four alkyl chains is stretched towards different directions. The temperature dependence of electrical resistivity and the charge-carrier mobility have been measured, and the resistivities at room temperature are ρ<SUB>a</SUB>⁄ρ<SUB>b</SUB>⁄ρ<SUB>c</SUB>=3.3×10<SUP>9</SUP>⁄2.0×10<SUP>9</SUP>⁄6.0×10<SUP>11</SUP> and 2.2×10<SUP>11</SUP>⁄1.0×10<SUP>11</SUP>⁄1.3×10<SUP>11</SUP> (Ω cm) for TSeC<SUB>2</SUB>-TTF and TSeC<SUB>4</SUB>-TTF, respectively. The quite isotropic character in the resistivities of a TSeC<SUB>4</SUB>-TTF crystal may originate from its rather strange molecular structure.

• 公益社団法人 日本化学会の論文

著者

• Mori Takehiko

  Institute for Molecular Science

• Maruyama Yusei

  Institute for Molecular Science

• Inokuchi Hiroo

  Institute For Molecular Science

• NAKANO Chikako

  Institute for Molecular Science

• Wang Ping

  Institute Of Cell And Molecular Sciences Barts And London School Of Medicine And Dentistry

• Iwasawa Naoko

  The Institute for Solid State Physics, The University of Tokyo

• Yamochi Hideki

  The Institute for Solid State Physics, The University of Tokyo

• Saito Gunzi

  The Institute for Solid State Physics, The University of Tokyo

• Urayama Hatsumi

  The Institute for Solid State Physics, The University of Tokyo

• Saito Gunzi

  The Institute for Molecular Science

• Wang Ping

  Institute for Molecular Science

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