Crystal structure and electrical conductivity of α'''-[BEDT-TTF] 12[Cu2Br4]3 (BEDT-TTF= bis(ethylenedithio)tetrathiafulvalene)

Kazuya Kubo; Hitoshi Miyasaka; Masahiro Yamashita

doi:10.1016/j.physb.2009.10.064

Crystal structure and electrical conductivity of α'''-[BEDT-TTF] ₁₂[Cu₂Br₄]₃ (BEDT-TTF= bis(ethylenedithio)tetrathiafulvalene)

Kazuya Kubo, Hitoshi Miyasaka, Masahiro Yamashita

Research output: Contribution to journal › Article

Abstract

A new non-integer valence salt based on bis(ethylenedithio) tetrathiafulvalene (BEDT-TTF) with a dianionic dinuclear cupper(I) complex, α'''-[BEDT-TTF]₁₂(Cu1/2Br₄)₃, was selectively synthesized by a diffusion of BEDT-TTF in tetrahydrofurane (THF) and a mixture of Cu^IIX₂ (X=Br or Cl) in methanol. An alternating stacking arrangement of the BEDT-TTF layers and inorganic layers of the Cu1/2Br₄^2- anions is formed, where the BEDT-TTF layer involves six crystallographically independent molecules. Overlap integral calculation among BEDT-TTF donors in the salt suggests the existence of two-dimensional interactions among the donors. The compound exhibits semiconducting behavior in the wide range of temperature of room temperature to 2K (ρ_r.t.=0.3ωcm, E_a=0.08 eV in a crystal) without structural phase transition at ambient pressure.

Original language	English
Pages (from-to)	S308-S312
Journal	Physica B: Condensed Matter
Volume	405
Issue number	11 SUPPL.
DOIs	https://doi.org/10.1016/j.physb.2009.10.064
Publication status	Published - 2010 Jun 1

Keywords

BEDT-TTF
Bimetallic anionic complex
Cationic donor molecule
Molecular conductor
Non-integer valence salt

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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Kubo, K., Miyasaka, H., & Yamashita, M. (2010). Crystal structure and electrical conductivity of α'''-[BEDT-TTF] ₁₂[Cu₂Br₄]₃ (BEDT-TTF= bis(ethylenedithio)tetrathiafulvalene). Physica B: Condensed Matter, 405(11 SUPPL.), S308-S312. https://doi.org/10.1016/j.physb.2009.10.064

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abstract = "A new non-integer valence salt based on bis(ethylenedithio) tetrathiafulvalene (BEDT-TTF) with a dianionic dinuclear cupper(I) complex, α'''-[BEDT-TTF]12(Cu1/2Br4)3, was selectively synthesized by a diffusion of BEDT-TTF in tetrahydrofurane (THF) and a mixture of CuIIX2 (X=Br or Cl) in methanol. An alternating stacking arrangement of the BEDT-TTF layers and inorganic layers of the Cu1/2Br42- anions is formed, where the BEDT-TTF layer involves six crystallographically independent molecules. Overlap integral calculation among BEDT-TTF donors in the salt suggests the existence of two-dimensional interactions among the donors. The compound exhibits semiconducting behavior in the wide range of temperature of room temperature to 2K (ρr.t.=0.3ωcm, Ea=0.08 eV in a crystal) without structural phase transition at ambient pressure.",

keywords = "BEDT-TTF, Bimetallic anionic complex, Cationic donor molecule, Molecular conductor, Non-integer valence salt",

author = "Kazuya Kubo and Hitoshi Miyasaka and Masahiro Yamashita",

year = "2010",

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AU - Yamashita, Masahiro

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N2 - A new non-integer valence salt based on bis(ethylenedithio) tetrathiafulvalene (BEDT-TTF) with a dianionic dinuclear cupper(I) complex, α'''-[BEDT-TTF]12(Cu1/2Br4)3, was selectively synthesized by a diffusion of BEDT-TTF in tetrahydrofurane (THF) and a mixture of CuIIX2 (X=Br or Cl) in methanol. An alternating stacking arrangement of the BEDT-TTF layers and inorganic layers of the Cu1/2Br42- anions is formed, where the BEDT-TTF layer involves six crystallographically independent molecules. Overlap integral calculation among BEDT-TTF donors in the salt suggests the existence of two-dimensional interactions among the donors. The compound exhibits semiconducting behavior in the wide range of temperature of room temperature to 2K (ρr.t.=0.3ωcm, Ea=0.08 eV in a crystal) without structural phase transition at ambient pressure.

AB - A new non-integer valence salt based on bis(ethylenedithio) tetrathiafulvalene (BEDT-TTF) with a dianionic dinuclear cupper(I) complex, α'''-[BEDT-TTF]12(Cu1/2Br4)3, was selectively synthesized by a diffusion of BEDT-TTF in tetrahydrofurane (THF) and a mixture of CuIIX2 (X=Br or Cl) in methanol. An alternating stacking arrangement of the BEDT-TTF layers and inorganic layers of the Cu1/2Br42- anions is formed, where the BEDT-TTF layer involves six crystallographically independent molecules. Overlap integral calculation among BEDT-TTF donors in the salt suggests the existence of two-dimensional interactions among the donors. The compound exhibits semiconducting behavior in the wide range of temperature of room temperature to 2K (ρr.t.=0.3ωcm, Ea=0.08 eV in a crystal) without structural phase transition at ambient pressure.

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KW - Molecular conductor

KW - Non-integer valence salt

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