Peroxy radicals dominate atmospheric chemistry as important reaction intermediates in the oxidation of all volatile organic compounds (VOC). Biogenic alkene emissions such as isoprene and 2-methyl-3-buten-2-ol (MBO-232) react rapidly with free radicals to form substituted alkylperoxy radicals. Substituent effects will affect reaction rates but few experiments have been completed on substituted alkylperoxy radicals. Direct detection of substituted alkylperoxy radicals and subsequent kinetic measurements are necessary to understand the process of VOC oxidation. We obtained cavity ring-down spectra of the A-X transition for atmospherically-relevant substituted alkylperoxy radicals in the near-infrared which allows structural distinguishability. The spectroscopy and kinetics of radical NO3- and Cl-initiated oxidation of MBO-232, 2-butene, and 3-methyl-1-butene are presented here.

Direct detection and kinetics of NO<sub>3</sub> and Cl substituted alkylperoxy radicals using cavity ring-down spectroscopy

243rd National Meeting (2012)

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Direct detection and kinetics of NO3 and Cl substituted alkylperoxy radicals using cavity ring-down spectroscopy

Direct detection and kinetics of NO₃ and Cl substituted alkylperoxy radicals using cavity ring-down spectroscopy