Articles | Volume 21, issue 12
Atmos. Chem. Phys., 21, 9681–9704, 2021
https://doi.org/10.5194/acp-21-9681-2021

Special issue: Simulation chambers as tools in atmospheric research (AMT/ACP/GMD...

Atmos. Chem. Phys., 21, 9681–9704, 2021
https://doi.org/10.5194/acp-21-9681-2021
Research article
29 Jun 2021
Research article | 29 Jun 2021

Highly oxygenated organic molecule (HOM) formation in the isoprene oxidation by NO3 radical

Defeng Zhao et al.

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Cited articles

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Berndt, T. and Böge, O.: Gas-phase reaction of NO3 radicals with isoprene: a kinetic and mechanistic study, Int. J. Chem. Kinet., 29, 755–765, https://doi.org/10.1002/(sici)1097-4601(1997)29:10<755::Aid-kin4>3.0.Co;2-l, 1997. 
Berndt, T., Mender, B., Scholz, W., Fischer, L., Herrmann, H., Kulmala, M., and Hansel, A.: Accretion Product Formation from Ozonolysis and OH Radical Reaction of alpha-Pinene: Mechanistic Insight and the Influence of Isoprene and Ethylene, Environ. Sci. Technol., 52, 11069–11077, https://doi.org/10.1021/acs.est.8b02210, 2018a. 
Berndt, T., Scholz, W., Mentler, B., Fischer, L., Herrmann, H., Kulmala, M., and Hansel, A.: Accretion Product Formation from Self- and Cross-Reactions of RO2 Radicals in the Atmosphere, Angew. Chem.-Int. Edit., 57, 3820–3824, https://doi.org/10.1002/anie.201710989, 2018b. 
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Short summary
The reaction of isoprene, a biogenic volatile organic compound with the globally largest emission rates, with NO3, an nighttime oxidant influenced heavily by anthropogenic emissions, forms a large number of highly oxygenated organic molecules (HOM). These HOM are formed via one or multiple oxidation steps, followed by autoxidation. Their total yield is much higher than that in the daytime oxidation of isoprene. They may play an important role in nighttime organic aerosol formation and growth.
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