Abstract
A novel catalytic electrodeposition of several kinds of conducting polymers in aqueous solutions is described. The anodic deposition potentials of pyrrole, N-methylpyrrole and aniline were shifted cathodically by 140–200 mV in the presence of tiron (4,5-dihydroxy-1,3-benzenedisulfonic acid) as a catalyst in the reaction mixture. The catalytic deposition of polypyrrole and polyaniline, and the composition of the produced films, were investigated. The conductivity of the catalytically prepared free-standing polypyrrole films was smaller than that of the directly prepared films. This one-step process was used to produce films holding anions (such as carboxylates) which cannot play the role of dopant in the direct oxidation of the monomer, and thus, to simplify the preparation of drug-loaded conducting polymers for a drug release device.
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