Rate constants for electronic quenching of N2(<i>A</i> 3Σ+<i>u</i>, <i>v</i>=0–6) by O2, NO, CO, N2O, and C2H4

Abstract

Rate constants for the title reactions have been measured using the discharge-flow technique, with N2(B 3Πg –A 3Σ+u) laser-excited fluorescence detection. C2H4 is an efficient quencher and exhibits little dependence of rate constant on vibrational quantum number v in N2(A). The rate constants for NO, O2, and N2O increase with v at low v, but are nearly independent of v for v≥3. CO shows a very strong dependence, with a peak in the rate constant at v=2 and a trough at v=5. These are the first data for the reactions of N2(A, v=2–6) with N2O. The other data are compared with previous measurements and discussed in terms of models of electronic-to-electronic energy transfer.