Articles | Volume 21, issue 4
Atmos. Chem. Phys., 21, 2881–2894, 2021
https://doi.org/10.5194/acp-21-2881-2021
Atmos. Chem. Phys., 21, 2881–2894, 2021
https://doi.org/10.5194/acp-21-2881-2021
Research article
25 Feb 2021
Research article | 25 Feb 2021

Aqueous-phase behavior of glyoxal and methylglyoxal observed with carbon and oxygen K-edge X-ray absorption spectroscopy

Georgia Michailoudi et al.

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Cited articles

Bluhm, H., Ogletree, D. F., Fadley, C. S., Hussain, Z., and Salmeron, M.: The premelting of ice studied with photoelectron spectroscopy, J. Phys. Condens. Matter, 14, L227, https://doi.org/10.1088/0953-8984/14/8/108, 2002. a
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De Haan, D. O., Corrigan, A. L., Smith, K. W., Stroik, D. R., Turley, J. J., Lee, F. E., Tolbert, M. A., Jimenez, J. L., Cordova, K. E., and Ferrell, G. R.: Secondary Organic Aerosol-Forming Reactions of Glyoxal with Amino Acids, Environ. Sci. Technol., 43, 2818–2824, https://doi.org/10.1021/es803534f, 2009a. a
De Haan, D. O., Tolbert, M. A., and Jimenez, J. L.: Atmospheric Condensed-Phase Reactions of Glyoxal with Methylamine, Geophys. Res. Lett., 36, L11819, https://doi.org/10.1029/2009GL037441, 2009b. a
Ervens, B. and Volkamer, R.: Glyoxal processing by aerosol multiphase chemistry: towards a kinetic modeling framework of secondary organic aerosol formation in aqueous particles, Atmos. Chem. Phys., 10, 8219–8244, https://doi.org/10.5194/acp-10-8219-2010, 2010. a, b, c
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This study provides insight into hydration of two significant atmospheric compounds, glyoxal and methylglyoxal. Using synchrotron radiation excited X-ray absorption spectroscopy, we confirm that glyoxal is fully hydrated in water, and for the first time, we experimentally detect enol structures in aqueous methylglyoxal. Our results support the contribution of these compounds to secondary organic aerosol formation, known to have a large uncertainty in atmospheric models and climate predictions.
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