New π-Extended Donors: Synthesis, Characterization, Electrochemical and Electrical Conductivity Studies

Abstract

A new series of tetrathiafulvalene (TTF) molecules with extended π-system was prepared by using a Wittig reaction to generate the TTF key. The process of deprotection-alkylation of thiolates provided access to a wide variety of molecules. The study of their reducing power was carried out by cyclic voltammetry. Charge transfer complexes have also been chemically prepared by using TCNQ as an electron acceptor; the electrical conductivity of their compressed powders shows insulator behavior. The IR spectra of the TCNQ salts were recorded and used to characterize and estimate the degree of charge transfer of these complexes.

GRAPHICAL ABSTRACT

Keywords:

• Cyclic voltammetry
• π-extended electron-donors
• organic materials
• phosphonate
• phosphonium salt
• thiolate

Acknowledgments

This work was realized within the framework of an agreement schedule Franco-Algerian of inter-university cooperation (University of Tébessa, University of Montpelier and University of Rennes) with the support of the CMEP, the Algerian Ministry of Higher Education, and the French Ministry of Foreign Affairs, which we thank sincerely.