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Proceedings Paper

Kinetics and mechanisms of the reaction of O(1D)-atoms with CBrF3 and CBrF2CBrF2 in the gas phase and in solid argon matrices
Author(s): H. Lorenzen-Schmidt; R. Weller; Otto Schrems; Claus J. Nielsen
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Paper Abstract

FTIR-spectroscopy has been applied for measurements of gas phase rate constants for the reactions of O(1D) with halon 1301 (CBrF3) and halon 2402 (CBrF2CBrF2). Singlet atomic oxygen has been produced by photolysis of ozone at 253.7 nm. Carbonyl fluoride (F2CO) was the dominant product for both reaction systems. CO and CO2 have also been formed. The rate constants have been determined to be 4.16 (+/- 0.39)10-11 cm3/molec(DOT)sec and 9.15 (+/- 1.22)(DOT)10-11 cm3/molec(DOT)sec, respectively. In order to identify possible intermediates these reaction systems have also been investigated in rare gas matrices. Mixtures of CBrF3/16O3/Ar and CBrF3/18O3/Ar were deposited at 12 K and irradiated at various wavelengths between 250 and 280 nm. The appearance of two intense bands in the infrared spectra at 1204.3 cm-1 and 1249.2 cm-1 (16O3) or 1193.5 cm-1 and 1250.1 cm-1(18O3) indicated the formation of CF3OBr.

Paper Details

Date Published: 31 January 1994
PDF: 2 pages
Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166570
Show Author Affiliations
H. Lorenzen-Schmidt, Alfred Wegener Institute for Polar and Marine Research (Germany)
R. Weller, Alfred Wegener Institute for Polar and Marine Research (Germany)
Otto Schrems, Alfred Wegener Institute for Polar and Marine Research (Germany)
Claus J. Nielsen, Univ. of Oslo (Norway)


Published in SPIE Proceedings Vol. 2089:
9th International Conference on Fourier Transform Spectroscopy
John E. Bertie; Hal Wieser, Editor(s)

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