Structure and physical properties of (n-Bu4N)2 [Au(dcbdt)2]5

被引:20
作者
Alves, H [1 ]
Simao, D
Lopes, EB
Belo, D
Gama, V
Duarte, MT
Novais, H
Henriques, RT
Almeida, M
机构
[1] Inst Tecnol & Nucl, Dept Quim, P-2686953 Sacavem, Portugal
[2] Univ Tecn Lisboa, Dept Engn Quim, Inst Super Tecn, P-1049001 Lisbon, Portugal
关键词
organic conductors based on radical anion salts; electrochemical methods; electrical transport; magnetic susceptibility;
D O I
10.1016/S0379-6779(00)00980-2
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
[(n-Bu)(4)N](2) [Au(dcbdt)(2)](5) was obtained as brown thin plate shaped crystals by electrochemical oxidation of (n-Bu)(4)N [Au(dcbdt)(2)], a Au complex with 4,5-dicyanobenzene-1,2-dithiolate (dcbdt) recently prepared. Cyclic voltammetry and optical spectroscopy studies indicate a mixed valence state. The crystal structure is triclinic and presents slightly pentamerised segregated stacks of the complex along (1,2,0). Single crystal electrical conductivity (sigma (RT)similar to 10 S/cm, Ea=13.5 meV) and thermopower measurements (S-RT=-6 mu V/K) suggest a degenerate semiconducting behaviour. The static susceptibility measurements give an almost temperature independent paramagnetic value of 3.5x10(-4) emu/mol. These and EPR results are discussed in relation to the crystal structure.
引用
收藏
页码:1011 / 1012
页数:2
相关论文
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