Structures and Properties of Novel TTP Conductors Containing Chalcogenopyran-4-ylidene

摘要

Realization of multi-dimensional electronic structure has been regarded to be important to retain metallic conductivity down to low temperature and to cause superconductivity as a result. We have demonstrated that a bis-fused TTF, 2,5-bis(l,3-dithiol-2-ylidene)-l,3,4,6-tetrathiapentalene (TTP) has afforded many metallic radical-cation salts stable down to liquid helium temperature regardless of shape and size of counter anions, in which the donors have a two-dimensional array. On the other hand, (T)PDT-TTP and its derivatives are of interest because they are expected to show unique intermolecular interaction through chalcogen atom in the (thio)pyran ring. We report herein structures and electrical properties of several molecular conductors based on PDT-TTP type donors.