Photodissociation Dynamics of Nitrosobenzene by Means of LIF

The photodissociation of nitrosobenzene (C6H5NO) at 266nm has been studied by monitoring the nascent NO product using a one-photon laser-induced fluorescence (LIF) technique.The NO （X 2Π ν″=0→ A 2Σ+ ν′=0） ro-vibrational spectrum was obtained. The J" quantum numbers of NO (X, ν″=0) populated in the dissociation process have been assigned by comparing the experimental spectrum with the simulated spectrum. The rotational distributions with quantum numbers up to J″=50.5 were obtained. This means that the NO (X) fragments produced in the dissociation process are of highly rotational excitation. The probable photolysis mechanism is proposed for the photodissociation of C6H5NO at 266nm.