The photodissociation of N2O and the resulting production of O atoms have been studied in N2 matrices and in Xe matrices as a function of N2O concentration. A previously developed kinetic model accurately predicts the maximum attainable O atom concentration in dilute and moderately doped Xe matrices but severely overestimates the maximum concentration produced in a highly doped matrix. This deviation is the result of O atom reactions with locally high concentrations of N2O, which are present in highly doped matrices. The reaction products observed subsequent to photolysis of a neat N2O matrix and N2 matrices doped with isotopically labelled N2O confirm the occurrence of O atom chemistry and are compatible with O(1D) as the reactive species. N2O photodissociation is less efficient in more crystalline matrices and there is evidence that this is due to an enhanced cage effect.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry