Smarte, Matthew D. and Dodson, Leah G. and Okumura, Mitchio (2014) Cavity ringdown spectroscopy of chlorine-substituted peroxy radicals: Reaction kinetics with nitric oxide. In: 248th American Chemical Society National Meeting & Exposition, 10-14 August 2014, San Francisco, CA. https://resolver.caltech.edu/CaltechAUTHORS:20140814-131156147
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Abstract
Peroxy radicals (RO_2) are ubiquitous intermediates in the oxidn. of volatile org. compds. Their competing fates govern subsequent free radical chem. in the troposphere. Reaction of RO_2 with nitric oxide (NO) has two product channels: assocn. to an org. nitrate (RONO_2) or oxidn./redn. to nitrogen dioxide (NO_2) and an alkoxy radical (RO). In this work, we present measurements of the RO_2 + NO rate const. at several pressures for peroxy radicals formed in the chlorine-initiated oxidn. of ethene, propene, 2-butene, and isoprene. We monitor the decay of peroxy radicals through their weak and structured A-X transition in the near-IR using cavity ringdown spectroscopy (CRDS) and the simultaneous kinetics and ringdown (SKaR) technique. Chlorine is a minor tropospheric oxidant found in marine regions and its substitution yields insight into the structure and reactivity of RO_2 species. We compare our results to prior work in the literature at a fixed pressure and to measurements on hydroxyl-substituted peroxy radicals.
Item Type: | Conference or Workshop Item (Paper) | ||||||
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Additional Information: | © 2014 American Chemical Society. | ||||||
Record Number: | CaltechAUTHORS:20140814-131156147 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140814-131156147 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 48570 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | Tony Diaz | ||||||
Deposited On: | 14 Aug 2014 20:24 | ||||||
Last Modified: | 21 Feb 2020 23:15 |
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