Synthesis, structures and physical properties of the cation radical salts based on tempo radical containing electron donors

Abstract

We have synthesized new electron donors in which one or two TEMPO radical parts connect to the TTF skeleton through a 1,3-dithiol-2-ylidene ring to prevent the steric hindrance of the bulky TEMPO radical for the purpose of the realization of metallic conductivity. Furthermore crystal structure and physical properties of the donors and the cation radical salt have been clarified.