Metastable singlet NF: reactivity and energy storage

K. Y. Du; Donald W. Setser

doi:10.1117/12.18522

1 June 1990 Metastable singlet NF: reactivity and energy storage

K. Y. Du, Donald W. Setser

Proceedings Volume 1225, High-Power Gas Lasers; (1990) https://doi.org/10.1117/12.18522
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

A flow reactor using the 2F + HN₃ reaction to generate NF(a¹Δ) has been used to systematically study the reactions of NF(a¹Δ) at 300K. The biomolecular self-removal rate constant for NF(a¹Δ) was assigned as 5 +/- 2 x 10^-12 cm³s^-1 . Quenching rate constants by stable molecules span a wide range of values; those for diatomic molecules, with the notable exception of the halogens, generally are less than 1 x 10^-14 cm³s^-1 , but more reactive molecules, such as C₂H₄, NH₃ and P(CH₃)₃, have rate constants of l x 10^-11 cm³s^-1 . For those polyatomic molecules which can act as Lewis bases, a correlation exists between the magnitude of the quenching rate constant and the base strength. The rate constants for the halogens increase dramatically with molecular weight and the rate constant for I₂ is (1.5+/-1.0) x 10^-10 cm³s^-1 . The rate constants for open shell atoms and molecules tend to be smaller than expected; values for NO₂, N0, F, N, 0 and C are 0.65 x l0^-14 , 0.10 x 10^-14, 4 x 10^-13 , 5 x 10^-13 , 6 x 10^-12 and 2.7 x 10^-11 cm³s^-1, respectively. In general, the NF(a¹Δ) quenching rate constants are not so large as to preclue the utilization of complex schemes to extract the stored energy of NF(a¹Δ).

Citation Download Citation

K. Y. Du and Donald W. Setser "Metastable singlet NF: reactivity and energy storage", Proc. SPIE 1225, High-Power Gas Lasers, (1 June 1990); https://doi.org/10.1117/12.18522

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