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Title: Potential photooxidation pathways of dicarboxylie acids in atmospheric droplets
Authors: Yang, L.M. 
Yu, L.E. 
Ray, M.B.
Keywords: Dicarboxylic acid
Reaction pathway
Issue Date: 2008
Citation: Yang, L.M.,Yu, L.E.,Ray, M.B. (2008). Potential photooxidation pathways of dicarboxylie acids in atmospheric droplets. American Journal of Environmental Sciences 4 (5) : 462-466. ScholarBank@NUS Repository.
Abstract: Low molecular weight (LMW) dicarboxylic acids (DCAs) have received increasing attention because of their hygroscopic properties and capability of acting as cloud condensation nuclei (CCN). Based on the concentration profiles of intermediates identified during laboratory photooxidation of C 7-C9 DCAs in a liquid-phase reaction system, chemometric analyses were conducted to examine the degradation pathways of DCAs for the formation of secondary DCAs. Among all secondary DCAs formed during the reaction, C4 and C5 DCAs showed the largest stoichiornetric coefficients, indicating that sequential decarboxylation suggested in literature is unlikely the dominant pathway; other reaction routes e.g. preferential abstraction of hydrogen from carbon located at the central position of the DCA molecules by OH, followed by subsequent decomposition through the breakage of C-C bond, could play an important role. © 2008 Science Publications.
Source Title: American Journal of Environmental Sciences
ISSN: 1553345X
Appears in Collections:Staff Publications

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