Kinetic features of the chemiluminescent oxidation of N-octylluminol by the hypochlorite ion in a self-organized micellar medium

Abstract

For the model chemiluminescent reaction of N-octylluminol, a hydrophobic analogue of luminol and a surfactant, a scheme was established and parameters of the formal kinetic equation were calculated. The formation of intrinsic micelles of the substrate promotes a triple increaese in the rate of the first step of the luminogenous reaction and a multiple increase in the detected maximum and integrated signal intensities compared to results obtained in the classical chemiluminescent system based on luminol. The reversible conversion of N-octylluminol to a non-luminescent form was revealed, and the equilibrium is strongly shifted to the latter, which distorts the shape of the detected kinetic curve and decreases the analytical signal with time. This shift can be prevented by using the systems with controlled mixing of reagents.