A Vinylog of bis-Fused TTF - Novel Pi-Electron Framework for Metallic and Superconducting Organic-Solids

Misaki Y; Higuchi N; Ohta T; Fujiwara H; Yamabe T; Mori T; Mori H; Tanaka S

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.284, 27-38, 1996

DOI10.1080/10587259608037908 Export Citation

A Vinylog of bis-Fused TTF - Novel Pi-Electron Framework for Metallic and Superconducting Organic-Solids

Misaki Y, Higuchi N, Ohta T, Fujiwara H, Yamabe T, Mori T, Mori H, Tanaka S

The first vinylog of bis-fused tetrathiafulvalene (DTEDT) has been synthesized as a new donor component for organic conductors. Many cation radical salts of DTEDT showed metallic conducting behavior down to liquid helium temperature regardless of counter anions. Further, (DTEDT)(3)Au(CN)(2) exhibited superconducting transition at 4 K under ambient pressure. X-Ray crystal structure analysis of (DTEDT)(3)Au(CN)(2) reveals that this salt has a "uniform beta-type" arrangement of donor molecules in the conducting sheet. The band calculation indicates it has a closed Fermi surface.

Keywords:RADICAL-CATION SALTS;AMBIENT-PRESSURE;TETRATHIAFULVALENE;DONORS;2;5-BIS(1’;3’-DITHIOL-2’-YLIDENE)-1;3;4;6-TETRATHIAPENTALENE;DERIVATIVES;ANALOGS;SULFUR;DSDTF