Solvent Effects on the Picosecond Dynamics of the Photoreduction of Benzophenone by Aromatic Amines

Article abstract of DOI:10.1021/ja00411a023

Solvent effects on the primary processes in the photoreduction of benzophenone by N,N-dimethylaniline and N,N-diethylaniline have been studied by using picosecond absorption spectroscopy.It has been found that the photoreduction proceeds by rapid electron transfer to form the solvent-separated ion pair.This is followed by diffusion to form a contact ion pair.Sebsequent to contact ion-pair formation, proton transfer is observed.Solvent effects on the ion-pair intermediate indicated a dielectric dependent equilibrium between the contact ion pair and the ketyl radical.