New electroactive oligomer films of 1,5-diaminonaphthalene have been prepared on platinum and carbon graphite electrodes in acetonitrile solution by potential sweep electrolysis and controlled potential electrolysis. The films were electroactive in aqueous acidic solutions with a formal redox potential of ca. 0.33 V vs. SCE in 1 M HCl solution. Cyclic voltammetry, controlled potential electrolysis, SEM, FT-IR spectroscopy, H-1 NMR, conductivity measurements and gel permeation chromatography were used to characterize the oligomeric film.