Abstract
Series of unsymetrical and judiciously functionnalized tetrathiafulvalenes (TTFs) are elaborated by the protection-deprotection of thiolates or selenolates strategy. We have connected the physical properties of the corresponding materials to the interactions born out of the presence of selenium atoms on one side or both sides of the TTF core. The electrochemical values of the new donors are presented. Radical cation salts (RCS) and charge transfer complexes (CTC) were prepared in order to study, in particular, their electrical conductivity