Preparation of a novel conducting polymer by electropolymerization of thiophenylidine 8-naphthylamine Schiff-base

The Schiff-base resulting from the reaction of 3-thiophene carboxaldehyde with 1,8-diaminonaphthalene was isolated and characterized. The electropolymerization of Schiff-base was carried out in acetonitrile containing tetrabutyl ammonium tetrafluoroborate. The film coated electrode showed an electrochemical response. The stability of the redox response towards repetitive cyclic voltammetry was studied. The effect of number of sweep, scan rates and potential cyclic limits on the redox peaks of the obtained modified electrodes were investigated and explained. The resulting modified electrode behaves as an electrocatalyst for the electrode reaction of hydroquinone. The modified electrode is chemically and electrochemically stable both in aqueous solution and mixtures containing methanol, making it excellent candidate for sensing and/or electrocatalytic applications.