Electrochemical copolymerization of bithiophene and aniline in aqueous-organic mixed solution

Polybithiophene (PBTh) and polyaniline (PAn) have been synthesized electroc hemically in an aqueous-organic mixed solvent containing perchloric acid an d acetonitrile. By using the mixed solvent system, the difference between t he oxidation potentials of the two monomers is substantially reduced to 0.1 7 V from 0.55 V in purl acetonitrile organic medium. This enables the elect rosynthesis of copolymer of bithiophene and aniline. Raman and absorption s pectra were compared.