ELECTRON-TRANSFER FROM CYCLOHEXANE TO PHOTOEXCITED AROMATIC IONS - GENERATION AND KINETICS OF HIGH-MOBILITY SOLVENT HOLES

In cyclohexane solutions, aromatic radical cations are produced by two -photon (248 nm) photoionization of aromatic molecules. A novel excite d state chemistry is observed; i.e., excitation of these radical catio ns with a 532 nm laser pulse, delayed by several microseconds, produce s the high mobility cation of cyclohexane. The difference of the signa ls with and without the 532 nm pulse shows the decay of the cyclohexan e radical cation free of complications from geminate ion recombination . The biexponential nature of this decay suggests an equilibrium invol ving the high mobility cation, such as was proposed to explain previou s experimental results.