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Spectroscopy and kinetics of the peroxy radicals formed by chlorine-initiated oxidation of isoprene

Dodson, Leah G. and Smarte, Matthew D. and Takematsu, Kana and Eddingsaas, Nathan C. and Okumura, Mitchio (2014) Spectroscopy and kinetics of the peroxy radicals formed by chlorine-initiated oxidation of isoprene. In: 247th ACS National Meeting & Exposition, 16-20 March 2014, Dallas, TX. https://resolver.caltech.edu/CaltechAUTHORS:20140423-074008314

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Abstract

Peroxy radicals dominate atm. chem. as important reaction intermediates in the oxidn. of volatile org. compds. (VOCs). Biogenic alkene emissions such as isoprene and 2-methyl-3-buten-2-ol (MBO-232) react rapidly with free radicals to form β- substituted alkylperoxy radicals. Chlorine-initiated oxidn. of VOCs has recently become of interest as more in-land sources of chlorine atoms are discovered. We have directly detected the A-X electronic transition spectrum of chlorine-substituted atmospherically-relevant alkyl peroxy radicals from 7000-9000 cm^(-1) using cavity ringdown spectroscopy. Spectra of peroxy radicals formed by chlorine-initiated oxidn. of isoprene, 2-butene, 3-methyl-1-butene, and MBO-232 are presented here. Kinetic rate consts. of peroxy radical self-reactions and peroxy radical reactions with HO_2 and NO were obtained by directly observing the near-IR absorption spectrum of the peroxy radical intermediate. These rate consts. will be reported here.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
https://www.acs.org/content/acs/en/meetings/spring-2014.htmlOrganizationConference Website
ORCID:
AuthorORCID
Dodson, Leah G.0000-0001-5960-056X
Takematsu, Kana0000-0002-2334-336X
Eddingsaas, Nathan C.0000-0003-1539-5415
Okumura, Mitchio0000-0001-6874-1137
Additional Information:© 2014 American Chemical Society.
Record Number:CaltechAUTHORS:20140423-074008314
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140423-074008314
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45128
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Apr 2014 19:40
Last Modified:21 Feb 2020 23:10

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