A Study of the Gas-Phase Reaction of NO2 with O3 by Matrix Isolation Infrared Spectroscopy

Article abstract of DOI:10.1021/j100296a050

The observed products of the NO2 + O3 reaction are N2O3 and N2O4.The presence of N2O3 as a product indicates that NO is formed in secondary reactions and subsequently reacts with NO2 to produce N2O3.In the experiments where ozone was allowed to deposit at a rapid rate (0.27 mmol/h), infrared absorptions attributable to N2O5 and NO were observed.We attribute the production of N2O5 to the formation of the symmetrical NO3 radical.Our data indicate that both the symmetrical and asymmetrical NO3 radicals are intermediates in the reaction of NO2 + O3.An explanation for the presence of NO in nighttime chemistry is given.Attempts to isolate symmetrical NO3 were unsuccessful.