What does this research mean for the field?

Heterogeneous reactions of amines with dinitrogen tetroxide (N2O4) at the air-water interface constitute a significant, previously missing pathway for the formation of particulate nitrosamines. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.ESTABLISHES_NEW_DIRECTION.

What question did this study set out to answer?

To identify the molecular mechanisms and energetic pathways of heterogeneous nitrosamine formation driven by dinitrogen tetroxide and amines at the air–water interface.

September 2, 2026Atmospheric chemistry and physicsOpen Access

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

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Authors

TCTai-Xing ChiShenyang Normal University NANing AnChangchun University of Science and Technology SNShuang NiNingbo University

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Implication

Molecular dynamics simulation reveals dual pathways for amine nitrosation at air–water interfaces, highlighting an overlooked source of particulate nitrosamines.

Key Points

To identify the molecular mechanisms and energetic pathways of heterogeneous nitrosamine formation driven by dinitrogen tetroxide and amines at the air–water interface.
Simulated interfacial chemical reactions between dinitrogen tetroxide (N2O4) and methylamine (MA) or dimethylamine (DMA) using Born–Oppenheimer molecular dynamics.
Calculated reaction pathways and free-energy barriers at 300 K using metadynamics simulations at the aqueous interface.
Direct N-nitrosation of MA or DMA by N2O4 occurs via a kinetically favored, barrierless pathway that yields nitrosamine cations and nitrate ions (NO3-).
Amine-mediated hydrolysis of N2O4 rapidly produces interfacial nitrous acid (HONO) within ~2–16 ps, enabling secondary nitrosation with a free-energy barrier of 7.65 kcal mol−1 at 300 K.

Cite This Study

Chi et al. (2026) studied this question.

synapsesocial.com/papers/6a97e25ec562ede874ec67cd https://doi.org/10.5194/acp-26-12261-2026

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Implication

Molecular dynamics simulation reveals dual pathways for amine nitrosation at air–water interfaces, highlighting an overlooked source of particulate nitrosamines.

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

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Implication

Key Points

Cite This Study

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

Discussion

Member takes

Implication

Key Points

Cite This Study

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