Picosecond Multiphoton Laser Photolysis and Spectroscopy of Liquid Benzenes

Abstract

The high peak power of the ps laser pulse easily induces nonlinear phenomena such as multiphoton excitation as well as multiphoton decomposition and ionization of molecules. We have already reported excimer formation of liquid benzene by the nonlinear excitation of the 355 nm ps laser pulse [1] and the production of solvated electron by 266 nm ps multiphoton excitation of water and alcohols [2]. This characteristic behavior under the excitation of powerful ps laser is similar to that induced by radiolysis and comparison of the results obtained by ps radiolysis with that by multiphoton laser photolysis will be an interesting problem. In this report, results of investigation on the mechanism of excimer formation in neat benzene and its alkyl derivatives induced by multiphoton excitation will be given.