Flash photolysis of iodides in the presence of quenching gases. III. Photolysis of C3F7OI

The quenching buffer method was used in measurements of the rate constants of the principal reactions involved in flash photolysis of the iodide C₃F₇OI (RI) and of its mixtures with buffer gases M (CF₃H, H₂O): R+R → R₂; R+I → RI; I^*+RI, M, I₂ → I+RI, M, I₂; I + I + RI, M → I₂ + RI, M. The broadening coefficients were determined for the line due to the active transition in a photodissociation laser when the broadening was due to collisions with C₃F₇OI, CF₃H, and H₂O molecules. The probabilities of formation of excited iodine atoms by photodissociation of the iodides C₂F₅I and C₃F₇OI with broadband ultraviolet radiation were also found. The low recombination efficiency (found for the iodides investigated earlier) was confirmed for the C₂F₅ and C₃F₇O radicals interacting with excited iodine atoms.