A cyclic voltammetric and coulometric study of a modified electrode prepared by electrooxidative polymerization of nickel complex of 1,5-diaminonaphthalene in acetonitrile

The electrooxidative polymerization of nickel complex of 1,5- diaminonaphth alene was performed in acetonitrile containing lithium perchlorate, using c yclic voltammetry and controlled potential electrolysis. The film coated el ectrode showed an electroactive redox response in acidic aqueous solutions only. The stability of the redox response towards repetitive cyclic voltamm etry was studied. The formal redox potential of the resulting film electrod e was about 0.28 V vs. Ag/Ag+ in 1.0 M acidic chloride aqueous solution (pH = 0). The electrical conductivity of the film was measured in 0.01 M KCI a queous solution and was found as (2.2 +/- 0.02) x 10(-4) S cm(-1). The morp hology of the film and the factors affecting its electroactivity were studi ed in detail.