Cavity ring-down spectroscopy of 1-, 2- and 3-methyl allyl peroxy radicals
Reza, Md Asmaul
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1201558.pptx
3274.pdf
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https://hdl.handle.net/2142/100662
Description
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
Issue Date
2018-06-18
Keyword(s)
Radicals
Date of Ingest
2018-08-17T16:09:28Z
2018-12-12T22:35:54Z
Abstract
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 OHinitiated oxidation of isoprene, the most abundant non-methane biogenic hydrocarbon. In this talk, room-temperature cavity ring-down (CRD) spectra of the A˜ ← 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 O2. 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 radicalsa are underway.
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1201558.pptx
3274.pdf
