Abstract
The yields of electronically excited iodine atoms I(5 2P 1 2 ) following the UV photodissociation of C 6H 5I and C 6F 5I have been studied using time-resolved atomic absorption spectrophotometry. The yields are shown to be low and spin—orbit relaxation by both molecules is rapid ( k(C 6H 5I) = (5.2 ± 0.4) × 10 −13, k(C 6F 5I) = (2.1 ± 0.2) × 10 −13 cm 3 molecule −1 s −1). The suitability of C 6H 5I and C 6F 5I as photochemical laser materials is discussed.
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