A temperature dependence study of the gas-phase reaction of the nitrate radical with 3-fluoropropene followed by laser induced fluorescence detection

Abstract

Absolute rate coefficient for the gas-phase reaction of NO 3 with 3-fluoropropene has been measured using the discharge-flow technique coupled to a LIF detection system for a range of temperatures from 296 K to 430 K. The measured room temperature rate constant is (0.39 Ϯ 0.02) ϫ 10 Ϫ14 molecule Ϫ1 cm 3 s Ϫ1. The Arrhenius expression k ϭ (7.17 Ϯ 3.34) ϫ 10 Ϫ12 exp[Ϫ(2248 Ϯ 169)/T] is proposed for the reaction. The reactivity of alkenes containing halogen atoms is discussed and compared to that of simple alkenes, on the basis of the correlations between the reactivity against NO 3 and the ionization potential of the alkenes.Tropospheric half life of 3-fluoropropene has been estimated at night and during daytime for typical NO 3 and OH trophospheric concentrations.