| Title: | Reactions of C(12)-C(14) n-Alkylcyclohexanes with Cl Atoms: Kinetics and Secondary Organic Aerosol Formation |
| Author(s): | Wang K; Wang W; Fan C; Li J; Lei T; Zhang W; Shi B; Chen Y; Liu M; Lian C; Wang Z; Ge M; |
| Address: | "State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. University of Chinese Academy of Sciences, Beijing 100049, P. R. China. Chinese Research Academy of Environmental Sciences, Beijing 100012, P. R. China. Hebei Normal University, Shijiazhuang 050010, P. R. China. Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Hong Kong SAR 999077, P. R. China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Long-chain alkanes are a type of intermediate volatility organic compound (IVOC) in the atmosphere and a potential source of secondary organic aerosols (SOAs). C(12)-C(14) n-alkylcyclohexanes are important compositions of IVOCs, with considerable concentrations and emission rates. The reaction rate constants and SOA formation of the reactions of C(12)-C(14) n-alkylcyclohexanes with Cl atoms were investigated in the present study. The reaction rate constants of the long-chain alkanes obtained via the relative-rate method at 298 +/- 0.2 K (in units of x10(-10) cm(3) molecule(-1) s(-1)) were as follows: k(hexylcyclohexane) = 5.11 +/- 0.28, k(heptylcyclohexane) = 5.56 +/- 0.30, and k(octylcyclohexane) = 5.74 +/- 0.31. The gas-phase products of the reactions were identified as mainly small molecules of aldehydes, ketones, and acids. The particle-phase products were mostly monomers and oligomers, but there were still trimers even under high-NO(x) conditions. Moreover, under high-NO(x) conditions (urban atmosphere), the SOA yields of hexylcyclohexane are higher than that under low-NO(x) conditions (remote atmosphere), indicating that more attention should be given to the SOA formation of Cl-initiated n-alkylcyclohexane oxidations in polluted regions. This research can further clarify the oxidation processes and SOA formation of n-alkylcyclohexanes in the atmosphere" |
| Keywords: | Cl atoms alkylcyclohexanes intermediate-volatility organic compounds long-chain alkanes rate constant secondary organic aerosol; |
| Notes: | "PubMed-not-MEDLINEWang, Ke Wang, Weigang Fan, Cici Li, Junling Lei, Ting Zhang, Wenyu Shi, Bo Chen, Yan Liu, Mingyuan Lian, Chaofan Wang, Zhe Ge, Maofa eng 2022/03/24 Environ Sci Technol. 2022 Apr 19; 56(8):4859-4870. doi: 10.1021/acs.est.1c08958. Epub 2022 Mar 23" |
