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Kinetic studies of the deactivation of O2(1Σg+) and O(1D)

✍ Scribed by Jichun Shi; John R. Barker

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 839 KB
Volume: 22
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550221207

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✦ Synopsis

The kinetics of the deactivation of Oz('Cg') is studied in real time. Oz('&+) is generated in this system by the O('D) + Oz reaction following 0 3 laser flash photolysis in the presence of excess 02, and it is monitored by its characteristic emission band at 762 nm. Quenching rate constants were obtained for 02, 03, Nz, COz, HzO, CF, and the rare gases. Since O('D) is the precursor for the formation of Oz('&'), the addition of an O('D) quencher effectively lowers the initial concentration of Oz('Eg+). By measuring the initial intensity of the 762 nm fluorescence signal, the relative quenching efficiencies were determined for O('D) quenching by Nz, COZ, Xe, and Kr with respect to 02; the results are in good agreement with literature values.

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