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

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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 → 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.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Pages2-14
Number of pages13
ISBN (Print)0819408808
StatePublished - 1993
EventOptical Methods in Atmospheric Chemistry - Berlin, Ger
Duration: Jun 22 1992Jun 24 1992

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1715
ISSN (Print)0277-786X

Other

OtherOptical Methods in Atmospheric Chemistry
CityBerlin, Ger
Period6/22/926/24/92

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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