Articles | Volume 23, issue 23
https://doi.org/10.5194/acp-23-15135-2023
https://doi.org/10.5194/acp-23-15135-2023
Research article
 | 
08 Dec 2023
Research article |  | 08 Dec 2023

Direct formation of HONO through aqueous-phase photolysis of organic nitrates

Juan Miguel González-Sánchez, Miquel Huix-Rotllant, Nicolas Brun, Julien Morin, Carine Demelas, Amandine Durand, Sylvain Ravier, Jean-Louis Clément, and Anne Monod

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Subject: Clouds and Precipitation | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Bonfrate, S., Ferré, N., and Huix-Rotllant, M.: An efficient electrostatic embedding QM/MM method using periodic boundary conditions based on particle-mesh Ewald sums and electrostatic potential fitted charge operators, J. Chem. Phys., 158, 21101, https://doi.org/10.1063/5.0133646, 2023. 
Brun, N., González-Sánchez, J. M., Demelas, C., Clément, J.-L., and Monod, A.: A fast and efficient method for the analysis of α-dicarbonyl compounds in aqueous solutions: Development and application, Chemosphere, 137977, https://doi.org/10.1016/J.CHEMOSPHERE.2023.137977, 2023. 
Carbajo, P. G. and Orr-Ewing, A. J.: NO2 quantum yields from ultraviolet photodissociation of methyl and isopropyl nitrate, Phys. Chem. Chem. Phys., 12, 6084–6091, https://doi.org/10.1039/c001425g, 2010. 
Darer, A. I., Cole-Filipiak, N. C., O'Connor, A. E., and Elrod, M. J.: Formation and stability of atmospherically relevant isoprene-derived organosulfates and organonitrates, Environ. Sci. Technol., 45, 1895–1902, https://doi.org/10.1021/es103797z, 2011. 
Finlayson-Pitts, B. J. and Pitts Jr., J. N.: Chemistry of the Upper and Lower Atmosphere, Academic P., Elsevier, https://doi.org/10.1016/b978-0-12-257060-5.x5000-x, 2000. 
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Short summary
Organic nitrates play a crucial role in air pollution, as they are nitrogen oxide (NOx) reservoirs. This work investigated the reaction products and mechanisms of their reactivity with light in the aqueous phase (cloud and fog conditions and wet aerosol). Our findings reveal that this chemistry leads to the formation of atmospheric nitrous acid (HONO).
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