Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 17
Articles | Volume 26, issue 17
https://doi.org/10.5194/acp-26-12261-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-12261-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 17
Research article
 | 
31 Aug 2026
Research article |  | 31 Aug 2026

Heterogeneous nitrosation reactions of amines driven by dinitrogen tetroxide: a missing source of particulate nitrosamines

Tai-Xing Chi, An Ning, Shuang Ni, Wei-Kang Xiao, Yang Liu, Xiu-Cong Deng, Ling Liu, Feng-Yang Bai, Zhen Zhao, and Xiu-Hui Zhang

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Short summary
Carcinogenic nitrosamines are pervasive in air pollution, yet their origins remain elusive. Using Born–Oppenheimer molecular dynamics, we demonstrate that nitrosamines form rapidly at the air–water interface via the reaction of amines with dinitrogen tetroxide. This mechanism also yields nitrous acid, thereby exacerbating pollution. By identifying this critical missing source of airborne carcinogens, our work underscores the necessity of integrating interfacial chemistry into atmospheric models.
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