Synthesis and physical properties of a new single-component molecular conductor [Au(dhdt)2] |
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| Authors: | Hiroyuki Nishikawa Wataru Yasuoka Kumiko Sakairi Hiroki Oshio |
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| Institution: | Department of Chemistry, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan;Department of Chemistry, University of Florida, Gainesville, FL, USA |
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| Abstract: | We have succeeded in synthesizing a new Au(III) complex coordinated by a dihydro-TTF-ditiolato ligand, dhdt2? (4,5-dihydrotetrathiafulvalene-4,5-dithiolato) as a tetrabutlylammoium or tetraphenylphosphonium salt. Crystal structural analysis of (Ph4P)Au(dhdt)2] revealed that the Au(III) ion adopts a square planar coordination and the mean Au–S bond length suggests the Au ions are in the trivalent Au(III) state. A neutral complex, Au(dhdt)2], was obtained by the electrochemical oxidation of (n-Bu4N) Au(dhdt)2]. Conducting behavior of Au(dhdt)2] was semiconductive with conductivity at room temperature of 8.3 Scm?1 and activation energy of 23 meV. Magnetic susceptibility of Au(dhdt)2] was well explained by the sum of the Curie and temperature independent components. |
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