Primary Processes in the Photoreduction of Acridine in Various Alcohols

Abstract

The effect of the addition of biacetyl on the quantum yield of photoreduction of acridine in methanol, ethanol, n- and iso-propanol has been studied under the aerated and deaerated conditions. From the analysis of the results, the quantum yields for four mechanisms Φ_M^S(S means that a reactive state is singlet excited states, S^*, and M denotes a molecular mechanism), Φ_M^S (R denotes a radical mechanism), Φ_M^T (T indicates that a reactive state is a state other than S^* and T(π–π^*), most likely T(n–π^*) and Φ_R^T have been decided, assuming that oxygen does not deactivate T(n–π^*). The values are