Poly(3-methoxyethoxythiophene) and its Copolymers with Aniline, Thiophene and Pyrrole: Chemical and Electrochemical

We have investigated the chemical and electrochemical polymerization of a thiophene derivative functionalized with a 3-methoxyethoxy moiety and its copolymers with aniline, thiophene and pyrrole. Chemical polymerization of monomers was carried out in presence of FeCIO4.9HrOIHCIO.i oxidant. The electropolymerization by a cyclic voltammetry method was studied under the sufficient concentrations of monomer, 0.1 M tetrabutylammonium hexafluoro-phosphate, 20 mL acetonitrile, GC disk working electrode, Ag/AgCI reference electrode and platinum wire counter electrode conditions. The produced films give highly conducting polymeric materials, some of which are soluble in common organic solvents. The conductivity of polymers was measured by four-point probe technique. The undoped state of the polymers possessed conductivities of lower than 10-4—10-3 Slcm. After doping with FeCl3! nitro-methane or vapour 12, conductivities increased to 10-3—10.2 Slcm. Properties of the polymers were characterized using UV, IR, NMR, CV and GPC. Key Words: chemical and electrochemical polymerization, conducting polymers, 3-metoxyethoxythiophene, copolyme