Free radicals in redox reactions of 4,4′-di-(2,6-diphenylthiapyrylo)monomethinecyanine fluoroborate

ESR spectroscopic and electrochemical studies of the one-electron reduction and oxidation of 4,4′-di-(2,6-diphenylthiapyrylo)monomethinecyanine have been carried out. Relatively stable cyanine free radicals have been detected and characterized.