Cyclic Voltammetry and Electronic Absorption Spectroscopy in Investigations of the Nature of the Electrochemical Reduction of Phenyldiazonium and Phenyl-bis-diazonium Cations

摘要

The electrochemical reduction of phenyldiazonium and phenyl-bis-diazonium cations on mercury drop and platinum cathodes exhibits a multistep nature,as demonstrate the results of polarographic and cyclic voltammetry measurements.The primarily formed radicals participate in various secondary processes,as a result of which occur species absorbing UV-VIS radiation.Electronic absorption in the visible region can be ascribed to entities forming from the recombination of two azophenyl or azophenyl and phenyl radicals,originating from the one- or two-electron reduction of primarily or secondary formed cations.