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Title:CAVITY RING-DOWN SPECTROSCOPY OF 1-, 2- AND 3-METHYL ALLYL PEROXY RADICALS
Author(s):Reza, Md Asmaul
Contributor(s):Liu, Jinjun; Alam, Jahangir; Paul, Anam C.; Telfah, Hamzeh
Subject(s):Radicals
Abstract:\begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.5]{Asmaul.eps} \end{wrapfigure} Peroxy radicals are key reaction intermediates formed during the oxidation of hydrocarbons in the atmosphere and in low-temperature combustion. Allyl group-containing peroxy radicals are particularly important because they are generated in large quantities by the OH-initiated oxidation of isoprene, the most abundant non-methane biogenic hydrocarbon. In this talk, room-temperature cavity ring-down (CRD) spectra of the $\tilde A \leftarrow \tilde X$ electronic transition of 1-, 2- and 3-methyl allyl peroxy radicals will be reported. Peroxy radicals were produced in 193 nm photolysis of selected methyl-substituted allyl chlorides, e.g., 1-chloro-2-butene, 3-chloro-2-methyl-1 propene, and 3-chloro-1-butene, in the presence of O$_2$. Vibronic structure of the experimentally observed spectra are simulated using calculated electronic transition frequencies, vibrational frequencies, and Franck-Condon factors. Spectroscopic detection and characterization of isoprene peroxy radicals\footnote{A. P. Teng, J. D. Crounse, and P. O. Wennberg, J. Am. Chem. Soc. 139, 5367 (2017).} are underway.
Issue Date:06/18/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100662
DOI:10.15278/isms.2018.MJ11
Other Identifier(s):MJ11
Date Available in IDEALS:2018-08-17
2018-12-12


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