Preprints
https://doi.org/10.5194/egusphere-2024-3323
https://doi.org/10.5194/egusphere-2024-3323
28 Oct 2024
 | 28 Oct 2024
Status: this preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).

Gas-phase Observations of Accretion Products from Stabilized Criegee Intermediates in Terpene Ozonolysis with Two Dicarboxylic Acids

Yuanyuan Luo, Lauri Franzon, Jiangyi Zhang, Nina Sarnela, Neil M. Donahue, Theo Kurtén, and Mikael Ehn

Abstract. Criegee intermediates (CIs), forming from the ozonolysis of alkenes, are highly reactive species with diverse reaction pathways, with important roles in atmospheric chemistry. This study focuses on the formation of accretion products through reactions of thermally stabilized CIs (sCIs) from the ozonolysis of three different terpenes (α-pinene, β-pinene, and β-caryophyllene) with malonic and oxalic acids. Our experimental results demonstrate that these reactions efficiently produce the expected accretion products, though with apparent variations in yields depending on the specific terpene and acid involved. To our knowledge, these are the first direct gas-phase observations of expected adducts from terpene-derived sCIs and carboxylic acids, paving the way for a better understanding of the importance and atmospheric implications of these reactions, especially in terms of aerosol-forming capabilities of these large product molecules.

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Yuanyuan Luo, Lauri Franzon, Jiangyi Zhang, Nina Sarnela, Neil M. Donahue, Theo Kurtén, and Mikael Ehn

Status: open (until 09 Dec 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
Yuanyuan Luo, Lauri Franzon, Jiangyi Zhang, Nina Sarnela, Neil M. Donahue, Theo Kurtén, and Mikael Ehn
Yuanyuan Luo, Lauri Franzon, Jiangyi Zhang, Nina Sarnela, Neil M. Donahue, Theo Kurtén, and Mikael Ehn

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Short summary
This study explores the formation of accretion products from reactions involving highly reactive compounds, Criegee intermediates. We focused on three types of terpenes, common in nature, and their reactions with specific acids. Our findings reveal that these reactions efficiently produce expected compounds. This research enhances our understanding of how these reactions affect air quality and climate by contributing to aerosol formation, crucial for atmospheric chemistry.