Formation of High Energy and Ultra Long-Lived Charge Separated State in 9-Substituted Acridinium Ion Produced by Photoinduced Electron Transfer

Abstract

Irradiation of an acetonitrile solution of 9-mesityl-10-methylacridinium ion (Acr⁺-Mes) results in formation of the long lived charge separated state via intramolecular electron transfer. The electron transfer dynamics was examined using the time-resolved fluorescence spectroscopy and ESR measurements. The intramolecular back electron transfer of the charge separated state was too slow to compete the intermolecular back electron transfer reaction.