THE 248 NM PHOTODISSOCIATION OF CLF3 - QUANTUM YIELDS FOR F AND CL ATOMS

The dynamics of the 248 nm excimer-laser-induced photodissociation of CIF3 has been investigated by the observation of the Cl atoms by time- resolved laser magnetic resonance. In the presence of Cl-2, photolytic ally produced F atoms interacted with Cl-2 to produce Cl atoms. Quantu m yields for F and Cl atom formation were measured by comparison to th e Cl signal from COCl2, photolysis for which the quantum yield is know n in the literature. The quantum yields for F and Cl atom formation ar e determined to be 1.85(-0.25)(+0.15) and < 0.02, respectively. By exa mination of the electronic configuration of the excited state of CIF3, the primary photodissociation products are predicted to be CIF2 + F. (C) 1997 Elsevier Science B.V.