TY - JOUR
T1 - Crystal structure and electrical conductivity of α'''-[BEDT-TTF] 12[Cu2Br4]3 (BEDT-TTF= bis(ethylenedithio)tetrathiafulvalene)
AU - Kubo, Kazuya
AU - Miyasaka, Hitoshi
AU - Yamashita, Masahiro
N1 - Funding Information:
This work was financially supported by Young Scientist Encouragement Fund 2009 from Faculty of Science, Tohoku University (Grant No. 51219-3-1 ).
PY - 2010/6/1
Y1 - 2010/6/1
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.
KW - BEDT-TTF
KW - Bimetallic anionic complex
KW - Cationic donor molecule
KW - Molecular conductor
KW - Non-integer valence salt
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U2 - 10.1016/j.physb.2009.10.064
DO - 10.1016/j.physb.2009.10.064
M3 - Article
AN - SCOPUS:84859906319
VL - 405
SP - S308-S312
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 11 SUPPL.
ER -