Photoionization mechanism of α,ω-diphenylpolyenes in polar solvents investigated by using coherent Raman spectroscopy

Abstract

By applying coherent Raman spectroscopy of nanosecond laser pulses the solvent-induced photoionization of some all- trans- α, ω-diphenylpolyenes has been investigated in resonance with the transient absorption bands of the radical ions in polar solvents having different electron-donating and electron-accepting properties. The experimental results reported so far are summarized and a whole picture of the mechanism of the photoionization is derived.