A Matrix-Isolation-Infrared Spectroscopic Study of the Reactions of Nitric Oxide with Oxygen and Ozone

Article abstract of DOI:10.1021/j100461a024

The oxidation of nitric oxide to NO2 has been studied by trapping the products of the gas-phase reactions of nitric oxide with excess oxygen and ozone in argon matrices at 10 K.The subsequent transitient species were identified and characterized by their infrared spectra.The primary products of the NO + O2 reactions were NO2, N2O3(A), N2O3(B), N2O4, and peroxy nitrate (OONO).The primary products of the NO + O3 reactions were NO2 and peroxy NO3 with the higher nitric oxides (N2O3, N2O4) formed in low concentrations relative to the NO + O2 reactions.Isotopic oxygen and ozone were employed to identify the infrared absorption frequency of peroxy nitrate.On the basis of our observations, reaction mechanisms are proposed for the oxidation of NO to NO2.