Laser flash photolysis studies of atmospheric free-radical chemistry using optical diagnostic techniques

Paul H. Wine; J. Michael Nicovich; Anthony J. Hynes; Robert E. Stickel; R. Peyton Thorn; Mian Chin; Jeffrey A. Cronkhite; Christie J. Shackelford; Zhizhong Zhao; Edward P. Daykin; Cornelius A. van Dijk; Shouzhi Wang; Jill V. Steidl

doi:10.1117/12.140183

12 February 1993 Laser flash photolysis studies of atmospheric free-radical chemistry using optical diagnostic techniques

Paul H. Wine, J. Michael Nicovich, Anthony J. Hynes, Robert E. Stickel, R. Peyton Thorn, Mian Chin, Jeffrey A. Cronkhite, Christie J. Shackelford, Zhizhong Zhao, Edward P. Daykin, Cornelius A. van Dijk, Shouzhi Wang, Jill V. Steidl

Author Affiliations +

Proceedings Volume 1715, Optical Methods in Atmospheric Chemistry; (1993) https://doi.org/10.1117/12.140183
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

Some recent studies carried out in our laboratory are described where laser flash photolytic production of reactant free radicals has been combined with reactant and/or product detection using time-resolved optical techniques to investigate the kinetics and mechanisms of important atmospheric chemical reactions. Discussed are (1) a study of the radical-radical reaction O + BrO yields Br + O₂ where two photolysis lasers are employed to prepare the reaction mixture and where the reactants O and BrO are monitored simultaneously using atomic resonance fluorescence to detect O and multipass UV absorption to detect BrO; (2) a study of the reaction of atomic chlorine with dimethylsulfide (CH₃SCH₃) where atomic resonance fluorescence detection of Cl is employed to elucidate the kinetics and tunable diode laser absorption spectroscopy is employed to investigate the HCl product yield; and (3) a study of the aqueous phase chemistry of Cl₂^- radicals where longpath UV absorption spectroscopy is employed to investigate the kinetics of the Cl₂^- + H₂O reaction.

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Paul H. Wine, J. Michael Nicovich, Anthony J. Hynes, Robert E. Stickel, R. Peyton Thorn, Mian Chin, Jeffrey A. Cronkhite, Christie J. Shackelford, Zhizhong Zhao, Edward P. Daykin, Cornelius A. van Dijk, Shouzhi Wang, and Jill V. Steidl "Laser flash photolysis studies of atmospheric free-radical chemistry using optical diagnostic techniques", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); https://doi.org/10.1117/12.140183

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