A flash photolysis, infrared chemiluminescence study of the rate constant for the recombination reaction F+O2+M

Autor:	Hao‐Lin Chen, Daniel W. Trainor, R. E. Center, W. I. Fyfe
Rok vydání:	1977
Předmět:	Infrared Chemistry Analytical chemistry General Physics and Astronomy law.invention Wavelength Reaction rate constant law Excited state Flash photolysis Physical and Theoretical Chemistry Recombination Excitation Chemiluminescence
Zdroj:	The Journal of Chemical Physics. 66:5513-5519
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.433872
Popis:	Infrared chemiluminescence was observed from vibrationally excited HF when mixtures of HF/O2/F2 were flash photolyzed over the wavelength region 2500–3500 A. We have interpreted this excitation as being the result of termolecular recombination reactions involving F atoms. A simple kinetic model was derived to explain these observations and a comparison of model predictions to the observed time resolved chemiluminescence signals showed reasonable agreement. Based on this model, third order kinetic rate constants for the reaction F+O2+M→FO2+M at 298 °K were determined and are 5.0±0.6, 15±3, 8.4±0.9, 5.4±0.6, and 2500±500×10−33 cm6/molecule2 sec for M=F2, O2, Ar, He, and HF, respectively. The rate constant for M=DF was found to be about two times slower than that of HF.
Databáze:	OpenAIRE
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