Electrochemical polymerization of 2- methyl-1- naphthylamine in an acidic perchlorate aqueous medium

Abstract

2-methyl-1 -naphthylamine was electropolymerized in an aqueous solution HClO4 + LiClCO4 (pH 1) at a controlled potential of 0.9 V (vs. SCE). Very adherent, black and smooth polymeric film was formed onto a flat platinum electrode. Based on chronoamperograms, the electropolymerization was found to be of the first order with respect to the monomer. Infrared spectroscopy reveals that polymerization occurred via N-C linkages. Gel permeation chromatography profile evidenced chains of molar masses up to 1600 g/mol to be the most abundant species in the polymer. The electrosynthesized poly (2-methyl-1-naphthylamine) film was proven to be electroactive, displaying two-step oxidation and reduction at 22°C. The film cyclovoltammetric response depends strongly on temperature. The electrochemical activity manifests itself up to temperature of 60°C only.