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Chemosphere

Title:		Formation of extremely low-volatility organic compounds from styrene ozonolysis: Implication for nucleation
Author(s):		Yu S; Jia L; Xu Y; Pan Y;
Address:		"State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Atmospheric Chemistry and Environmental Sciences, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Atmospheric Chemistry and Environmental Sciences, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address: jialong@mail.iap.ac.cn"
Journal Title:		Chemosphere
Year:		2022
Volume:		20220623
Issue:
Page Number:		135459 -
DOI:		10.1016/j.chemosphere.2022.135459
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"Styrene is a highly reactive compound with the dual nature of aromatics and olefins. This work presents evidence for formation of extremely low-volatility organic compounds (ELVOCs) from styrene ozonolysis. The molecules of ELVOCs were analyzed using a high-resolution orbitrap mass spectrometer. The results show that ELVOCs were oligomers characterized by stabilized Criegee radicals (SCIs) as chain units. The addition of C(6)H(5)CHOO (SCI1) or CH(2)OO (SCI2) can dramatically decrease the oligomers' volatility. At low relative humidity (RH), ELVOCs are mainly formed from the reaction of RO(2) radical, C(6)H(5)OO., with SCI1 and SCI2; however, ELVOCs are primarily produced by the reaction between benzoic acid and SCI1 at high RH. Ambient particles were also collected to propose the probable oligomers from styrene-SCI. Our results suggest that styrene-SCI derived ELVOCs may act as nucleating agents, potentially providing an experimental basis for nucleation events that frequently occur in urban areas"
Keywords:		Aerosols Humidity *Ozone Styrene *Volatile Organic Compounds Criegee radical Nucleation Oligomers Relative humidity;
Notes:		"MedlineYu, Shanshan Jia, Long Xu, Yongfu Pan, Yuepeng eng England 2022/06/27 Chemosphere. 2022 Oct; 305:135459. doi: 10.1016/j.chemosphere.2022.135459. Epub 2022 Jun 23"