LOW-MOLECULAR AND HIGH-MOLECULAR RADICAL CATIONS OF QUINOXALINE DERIVATIVES

Quinoxaline derivatives are used as sensitizing agents in colour-photography and for photoinduced polymerization reactions. The reactivity of these molecules depends on their preference for hydrogen transfer. As models for investigation of these reactions quinoxaline radical cations were prepared, using both monomer derivatives and polymers with analoguous side chains. The radicals are generated by reduction or by UV-radiation and are characterized by their ESR-spectra and their decay during radiation.