Investigation of photodissociation of free C3F7I molecules by λ=254 nm radiation and of CF3I, C3F7I, and CF3CFICF3 by λ=155–175 nm radiation

The main primary processes in the photolysis of C₃F₇I (λ =254 nm) were found to be photodissociation into C₃F₇ and two iodine atoms in the states ²P_1/2 (absolute quantum yield Φ_I^* = 0.95^+0.05_–0.08) and ²P_3/2 (Φ_I=0.05). The photodissociation of CF₃I, C₃F₇I, and CF₃CFICF₃ in the vacuum ultraviolet (λ=155–175 nm) gave the following results: Φ_I^*=0.0±0.1 for the ²P_1/2 state in all three cases; Φ_I=0.6±0.1 (CF₃I) and 0.4±0.1 (C₃F₇I and CF₃CFICF₃) for the ²P_3/2 state. The photodissociation of perfluoropropyl iodides produced also CF₃I or CF₃ (Φ=0.15) and C₃F₆ (Φ=0.03). The results obtained were analyzed.