Articles | Volume 25, issue 24
https://doi.org/10.5194/acp-25-18313-2025
https://doi.org/10.5194/acp-25-18313-2025
Research article
 | 
15 Dec 2025
Research article |  | 15 Dec 2025

Ethylamine-driven amination of organic particles: mechanistic insights via key intermediates identification

Peiqi Liu, Jigang Gao, Yulong Hu, Wenhao Yuan, Zhongyue Zhou, Fei Qi, and Meirong Zeng

Cited articles

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Bos, S. J., van Leeuwen, S. M., and Karst, U.: From fundamentals to applications: recent developments in atmospheric pressure photoionization mass spectrometry, Anal. Bioanal. Chem., 384, 85–99, https://doi.org/10.1007/s00216-005-0046-1, 2006. 
Charville, H., Jackson, D. A., Hodges, G., Whiting, A., and Wilson, M. R.: The uncatalyzed direct amide formation reaction – mechanism studies and the key role of carboxylic acid H-bonding, Eur. J. Org. Chem., 2011, 5981–5990, https://doi.org/10.1002/ejoc.201100714, 2011. 
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Short summary
This study examines ethylamine reactions with organic aerosols, showing secondary ozonides react more slowly than carboxylic acids or aldehydes, with decreasing reactivity as carbon chains lengthen. Advanced techniques revealed key intermediates (hydroxyl peroxyamines, amino hydroperoxides) and novel pathways, establishing a quantitative framework linking molecular processes to aerosol aging for atmospheric chemistry models.
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