화학공학소재연구정보센터
Journal of Physical Chemistry A, Vol.117, No.46, 12075-12081, 2013
Photodissociation of Anisole and Absolute Photoionization Cross-Section of the Phenoxy Radical
We have studied the photodissociation dynamics of anisole (C6H5OCH3) at 193 nm and determined the absolute photoionization cross-section of the phenoxy radical at 118.2 nm (10.486 eV) relative to the known cross-section of the methyl radical. Even at this energy, there is extensive fragmentation of the phenoxy radical upon photoionization, which is attributed to ionizing transitions that populate low-lying excited electronic states of the cation. For phenoxy radicals with less than similar to 1 eV of internal energy, we find a cross-section for the production of the phenoxy cation of 14.8 +/- 3.8 Mb. For radicals with higher internal energy, dissociative ionization is the dominant process, and for internal energies of similar to 2.7-3.7 eV, we find a total cross-section (photoionization plus dissociative ionization) of 22.3 +/- 4.1 Mb. The results are discussed relative to the recently reported photoionization cross-section of phenol.