Secondary reactions of aromatics-derived oxygenated organic molecules lead to plentiful highly oxygenated organic molecules within an intraday OH exposure

Abstract 2 intermediates generated by OH-initiated oxidation of anthropogenic volatile organic compounds (VOCs). It was also suggested that multi-generation OH oxidation could be an important source for aromatics-derived HOMs. However, our understanding of the generation of aromatics-derived HOMs is still insufficient, especially of their formation mechanisms, which determine molar yields of HOMs and are essential to the establishment of global chemical box models related to HOMs. In this study, with a potential aerosol mass oxidation flow reactor (PAM OFR), two series of OH-initiated oxidation experiments of 1,3,5-trimethylbenzene (1,3,5-TMB) were conducted to investigate the formation of aromatics-derived HOMs. In the first series, the evolution of oxidation products of 1,3,5-TMB in an OH exposure range of (0.5–5.0) × 10  molecules cm- 3 2 × 10 6 - 3 x into the reaction systems, further confirmed the existence of such secondary reactions. The second series of experiments was conducted with same residence time but much lower [OH], which also shows the generation of multi-generation HOMs with an [OH] as low as 1.06 × 10 7 - 3 5.86 × 10 8 - 3  s. Our study suggests the important role of secondary OH chemistry in the oxidation of aromatics if these oxygenated products survived long enough in the ambient atmosphere and elucidates detailed formation mechanisms of certain HOM products.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Secondary reactions of aromatics-derived oxygenated organic molecules lead to plentiful highly oxygenated organic molecules within an intraday OH exposure ; volume:24 ; number:13 ; year:2024 ; pages:7961-7981 ; extent:21 ; Atmospheric chemistry and physics ; 24, Heft 13 (2024), 7961-7981 (gesamt 21)

Contributors, Places and Time

• Creator: Wang, Yuwei ; Li, Chuang ; Zhang, Ying ; Li, Yueyang ; Yang, Gan ; Yang, Xueyan ; Wu, Yizhen ; Yao, Lei ; Zhang, Hefeng ; Wang, Lin

Further information

• DOI: 10.5194/acp-24-7961-2024
• URN: urn:nbn:de:101:1-2408061227535.346843324884
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 10:52 AM CEST