Azulene-substituted TTF derivatives

Abstract

In order to examine Little’s model for organic superconductors, several azulene-substituted TTF derivatives were synthesized. Measurements of the oxidation potentials using cyclic voltammetry (CV) provide their donor abilities. The molecular structure of AET (azulenoethylenedithiotetrathiafulvalene) was determined by X-ray analysis. Cation radical salts of synthesized donors with BF₄^– , ClO₄^– , PF₆^– , AsF₆^– and [Pt(dmit)₂ ]^n–(dmit=C₃S₅^2–=2-thioxo-1,3-dithiole-4,5-dithiolate) were prepared by galvanostatic electrolyses. Temperature-dependent electrical resistances indicate that these salts are all semiconductive. The crystal structure of (AET)₂ [Pt(dmit)₂ ] was determined by X-ray analysis and its electronic structure is discussed.