Room-temperature rate constants for the reaction D + O2+ M → DO2+ M. M = Ar, D2, CO2 and F2

Abstract

Reaction in mixtures of D₂–F₂–O₂–CO₂ dilute in Ar has been initiated by pulsed irradiation with a XeCl laser, and the resulting time-dependent infrared emission from the ν₃ vibrational band of CO₂ has been monitored. Experimental conditions were chosen such that the rate of DF formation and the decay of the emission were controlled by the rate of the reaction D + O₂+ M → DO₂+ M. Rate constants (10^–32 cm⁶ s^–1) at room temperature, determined from the measured emission decay, for M = Ar, CO₂, D₂ and F₂ are 1.7 ± 0.1, 15.9 ± 1.0, 7.1 ± 0.5 and 31.1 ± 3.9, respectively.