Kurten , T , Moller , K H , Nguyen , T B , Schwantes , R H , Misztal , P K , Su , L , Wennberg , P O , Fry , J L & Kjaergaard , H G 2017 , ' Alkoxy Radical Bond Scissions Explain the Anomalously Low Secondary Organic Aerosol and Organonitrate Yields From alpha-Pinene + NO3 ' , Journal of Physical Chemistry Letters , vol. 8 , no. 13 , pp. 2826-2834 . https://doi.org/10.1021/acs.jpclett.7b01038
Title: | Alkoxy Radical Bond Scissions Explain the Anomalously Low Secondary Organic Aerosol and Organonitrate Yields From alpha-Pinene + NO3 |
Author: | Kurten, Theo; Moller, Kristian H.; Nguyen, Tran B.; Schwantes, Rebecca H.; Misztal, Pawel K.; Su, Luping; Wennberg, Paul O.; Fry, Juliane L.; Kjaergaard, Henrik G. |
Contributor organization: | Department of Chemistry |
Date: | 2017-07-06 |
Language: | eng |
Number of pages: | 9 |
Belongs to series: | Journal of Physical Chemistry Letters |
ISSN: | 1948-7185 |
DOI: | https://doi.org/10.1021/acs.jpclett.7b01038 |
URI: | http://hdl.handle.net/10138/224426 |
Abstract: | Oxidation of monoterpenes (C10H16) by nitrate radicals (NO3) constitutes an important source of atmospheric secondary organic aerosol (SOA) and organonitrates. However, knowledge of the mechanisms of their formation is incomplete and differences in yields between similar monoterpenes are poorly understood. In particular, yields of SOA and organonitrates from alpha-pinene + NO3 are low, while those from Delta(3)-carene + NO3 are high. Using computational methods, we suggest that bond scission of the nitrooxy alkoxy radicals from Delta(3)-carene lead to the formation of reactive keto-nitrooxy-alkyl radicals, which retain the nitrooxy moiety and can undergo further reactions to form SOA. By contrast, bond scissions of the nitrooxy alkoxy radicals from alpha-pinene lead almost exclusively to the formation of the relatively unreactive and volatile product pinonaldehyde (C10H16O2), thereby limiting organonitrate and SOA formation. This hypothesis is supported by laboratory experiments that quantify products of the reaction of alpha-pinene + NO3 under atmospherically relevant conditions. |
Subject: |
INITIATED ATMOSPHERIC OXIDATION
CONTROLLED CHEMICAL CONDITIONS HIGH-NOX ENVIRONMENTS BIOGENIC HYDROCARBONS TROPOSPHERIC DEGRADATION SOA FORMATION BETA-PINENE BASIS-SETS OH ISOPRENE 116 Chemical sciences 114 Physical sciences |
Peer reviewed: | Yes |
Rights: | other |
Usage restriction: | openAccess |
Self-archived version: | publishedVersion |
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