Rate constants for electronic quenching of N2(A 3Sigma + u, v=0-6) by O2, NO, CO, N2O, and C2H4

Rate constants for the title reactions have been measured using the discharge-flow technique, with N₂(B ³Π_g -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.