Collect. Czech. Chem. Commun. 1983, 48, 477-483

Effect of cetyltrimethylammonium bromide on the electrochemiluminiscence and electrooxidation of luminol

Jan Lasovský and František Grambal

Department of Inorganic and Physical Chemistry, Palacký University, 771 46 Olomouc


The electrooxidation of luminol in alkaline solutions in the presence of cetyltrimethylammonium bromide (I) was studied by linear sweep voltammetry on fixed and vibrating platinum electrodes. The presence of I in low concentrations (below the critical micellar concentration) brings about aggregation of the luminol, which is manifested by an increase in the anodic peak height and its shift towards lower potentials. In micellar solutions the peak height decreases owing to the slower diffusion of the bulkier micelles, the shift to lower potentials being preserved. The light-voltage curves correspond with the voltammetric curves, exhibiting identical shifts of the peak potentials in dependence on the concentration of the surfactant.