I2 dissociation by O2(a1Δ) generated from the reaction O(1D) + N2O

A new kinetic scheme for the dissociation of I2 by O2(a1Δ) has been proposed by Azyazov et al. [7]. The reactions initiated by UV photolysis of N2O/I2 mixtures have been used to probe details of this dissociation model, and provide additional validation. Pulsed photolysis of both N2O and I2, was used to generate I(2P1/2), I(2P3/2), and O2(a1Δ). Emission spectroscopy and laser induced fluorescence techniques were used to follow the time evolutions of I(2P1/2) and I2. Suppression of the chain propagation stage of I2 dissociation has been observed for the first time. Computational modeling indicated that the observed kinetics are consistent with the revised dissociation model.