Cross Photoreaction of Glyoxylic and Pyruvic Acids in Model Aqueous Aerosol

The Journal of Physical Chemistry. a
Sha-Sha XiaMarcelo I Guzman

Abstract

Aerosols of variable composition, size, and shape are associated with public health concerns as well as with light-particle interactions that play a role in the energy balance of the atmosphere. Photochemical reactions of 2-oxocarboxylic acids in the aqueous phase are now known to contribute to the total secondary organic aerosol (SOA) budget. This work explores the cross reaction of glyoxylic acid (GA) and pyruvic acid (PA) in water, the two most abundant 2-oxocarboxylic acids in the atmosphere, under solar irradiation and dark thermal aging steps. During irradiation, PA and GA are excited and initiate proton-coupled electron transfer or hydrogen abstraction and α-cleavage reactions, respectively. The time series of photoproducts is studied by ion chromatography (IC) with conductivity and electrospray ionization (ESI) mass spectrometry (MS) detection, direct ESI-MS analysis in the negative ion mode, and nuclear magnetic resonance spectroscopy (NMR). The use of one-dimensional (1H and 13C NMR) and two-dimensional NMR techniques includes gradient correlation spectroscopy (gCOSY) and heteronuclear single quantum correlation (HSQC). The aging of photoproducts in the dark is monitored by UV-visible spectroscopy. The periodicity in ...Continue Reading

References

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Oct 31, 2017·The Journal of Physical Chemistry. a·Alexis J Eugene, Marcelo I Guzman

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Citations

Jan 22, 2019·Physical Chemistry Chemical Physics : PCCP·Kateryna GrygoryevaMichal Fárník
Mar 25, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Alexis J Eugene, Marcelo I Guzman
Dec 8, 2020·Journal of Geophysical Research. Atmospheres : JGR·Jonathan M MochDaniel J Jacob
May 23, 2020·The Journal of Physical Chemistry. a·Man LuoVicki H Grassian
May 4, 2021·The Science of the Total Environment·Lu ChenLin Wang
Sep 16, 2020·The Journal of Physical Chemistry. a·Md Sohel Rana, Marcelo I Guzman
Dec 9, 2020·Environmental Science & Technology·Hind A Al-AbadlehMarcelo I Guzman
Apr 13, 2019·The Journal of Physical Chemistry. a·Xia ShengHailiang Zhao
Jan 25, 2020·The Journal of Physical Chemistry. a·Sandra L BlairVeronica Vaida
Aug 25, 2020·Journal of the American Chemical Society·Josep M AngladaManuel F Ruiz-López
Sep 6, 2019·The Journal of Physical Chemistry. a·Aaron W HarrisonWarren J De Bruyn

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