ELECTROCHEMICAL SYNTHESIS OF NEW ELECTROACTIVE POLYMERS FROM DITHIENYLENE-VINYLENE DERIVATIVES

Highly conjugated thiophene derivatives, based on thienylene-vinylene and thieneylene-vinylene-phenylene units, have been synthesized in ord er to examine: (i) the effect of such regular conjugated monomer struc tures on the polymerization; (ii) the optical and electrochemical prop erties of the corresponding conjugated polymers. The all-trans monomer s have been prepared by a Wittig reaction and the polymers have then b een synthesized electrochemically. The polymers are electrochromic and can be reversibly doped both oxidatively and reductively. Their elect rochemical behavior and optical properties have been analysed on the b asis of quantum-chemical calculations.