ELECTROGENERATED CHEMILUMINESCENCE IN ELECTRODE SURFACE INVESTIGATION- DETERMINATION OF REDOX POTENTIALS OF ORGANIC DEPOLARIZERS IN ELECTRODE PROCESSES COMPLICATED BY THE CHEMICAL STAGE AND AT HIGH BACKGROUNDCURRENTS OF ELECTROLYSIS

The physicochemical rationale for a novel electrogenerated chemilumine scence technique for determining redox potentials of organic depolariz ers in electrode processes are discussed. The technique takes into acc ount the complications of the process associated with subsequent chemi cal reactions and high background currents of electolysis. Specifics o f the application of the new technique to cyclic voltammetry and to da ta acquisition in the cells with electrolyte convection are described. Convection of the electrolyte in the cell is produced by using either a rotating-disk electrode or a rotating-ring-disk electrode. It is sh own that the new method can be extremely useful for obtaining redox po tentials of various electrochemically active organic compounds, i.e., electroluminophors, under conditions when the ratio of the analyticall y useful signal (faradaic current) to the background signal (interfere nce caused by the residual components of the electrolytic current) is much less than unity, as well as when subsequent chemical reactions oc curing in the system complicate the faradaic process under investigati on.