Cavity ring-down spectroscopy of 1-, 2- and 3-methyl allyl peroxy radicals

Reza, Md Asmaul

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https://hdl.handle.net/2142/100662 Copy

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

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.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100662

DOI

10.15278/isms.2018.MJ11

Copyright and License Information

Copyright 2018 Md Asmaul Reza

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