Phototransformations of substituted p-terphenyl upon excitation by a XeCl laser

Phototransformations of 1.8-dicarboxyisobutyl-substituted p-terphenyl in et hanol are studied upon excitation by a XeCl laser at a power density of up to 180 MW/cm(2) for different types of radiation and different excitation g eometries. The absorption and emission spectra are studied before and after irradiation. The resources of the lasing medium, quantum yields of phototr ansformations, and relative quantum yields of photoproducts are determined. The transmission of the solutions at the excitation wavelength and the sha pe of radiation pulses are measured as functions of the pump power density. (C) 2000 MAIK "Nauka/Interperiodica".