Influence of Europium Chelate on the Chemiluminescence Kinetics During the Free-Radical Oxidation of Lipid Samples of Vegetable Origin

Abstract

The chemically inert luminophore, the chemiluminescence enhancer 1,10-phenanthroline-tris(thenoyl-trifluoroacetonate) of trivalent europium, increases the intensity of light emission by an order of magnitude during the initiated oxidation of lipid samples of vegetable origin (sunflower oil). The introduction of a light enhancer into the chemiluminescent system leads to a change in the kinetic profile, removing the characteristic peaks on the kinetic curves at the end of the induction period of the oxidation process, but without changing the induction period itself. Using mathematical computer modeling based on a kinetic scheme of 23 elementary reactions, it is shown that the observed kinetic behavior can be rationalized by a disproportionate increase in the quantum yields of chemiluminescence derived from different electronically excited products (light emitters) formed during the oxidation process.