Articles | Volume 19, issue 7
https://doi.org/10.5194/acp-19-5021-2019
https://doi.org/10.5194/acp-19-5021-2019
Research article
 | 
12 Apr 2019
Research article |  | 12 Apr 2019

Aqueous reactions of organic triplet excited states with atmospheric alkenes

Richie Kaur, Brandi M. Hudson, Joseph Draper, Dean J. Tantillo, and Cort Anastasio

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Cited articles

Anastasio, C. and McGregor, K. G.: Chemistry of fog waters in California's central valley: 1. In situ photoformation of hydroxyl radical and singlet molecular oxygen, Atmos. Environ., 35, 1079–1089, 2001. 
Anastasio, C., Faust, B. C., and Allen, J. M.: Aqueous-phase photochemical formation of hydrogen peroxide in authentic cloud waters, J. Geophys. Res.-Atmos., 99, 8231–8248, 1994. 
Anastasio, C., Faust, B. C., and Rao, C. J.: Aromatic carbonyl compounds as aqueous-phase photochemical sources of hydrogen peroxide in acidic sulfate aerosols, fogs, and clouds. 1. Non-phenolic methoxybenzaldehydes and methoxyacetophenones with reductants (phenols), Environ. Sci. Technol., 31, 218–232, 1996. 
Arnold, W. A.: One electron oxidation potential as a predictor of rate constants of N-containing compounds with carbonate radical and triplet excited state organic matter, Environ. Sci. Process. Impact., 16, 832–838, 2014. 
Bahnmüller, S., von Gunten, U., and Canonica, S.: Sunlight-induced transformation of sulfadiazine and sulfamethoxazole in surface waters and wastewater effluents, Water Res., 57, 183–192, 2014. 
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Short summary
Organic triplets are an important class of aqueous photooxidants, but little is known about their reactions with most atmospheric organic compounds. We measured the reaction rate constants of a model triplet with 17 aliphatic alkenes; using their correlation with oxidation potential, we predicted rate constants for some atmospherically relevant alkenes. Depending on their reactivities, triplets can be minor to important sinks for isoprene- and limonene-derived alkenes in cloud or fog drops.
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