Environmental Processing of Lipids Driven by Aqueous Photochemistry of α-Keto Acids

Rapf, Rebecca J.; Perkins, Russell J.; Dooley, Michael R.; Kroll, Jay A.; Carpenter, Barry K.; Vaida, Veronica

doi:10.1021/acscentsci.8b00124

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Environmental Processing of Lipids Driven by Aqueous Photochemistry of α-Keto Acids

2018
By Rapf, Rebecca J. ; Perkins, Russell J. ; Dooley, Michael R. ; ...
Source: ACS Cent. Sci. 2018, 4, 5, 624–630

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ACS Central Science
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Rapf, Rebecca J. ; Perkins, Russell J. ; Dooley, Michael R. ; Kroll, Jay A. ; Carpenter, Barry K. ; ... More +

Rapf, Rebecca J. ; Perkins, Russell J. ; Dooley, Michael R. ; Kroll, Jay A. ; Carpenter, Barry K. ; Vaida, Veronica Less -
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CIRES (Cooperative Institute for Research in Environmental Sciences)
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Sunlight can initiate photochemical reactions of organic molecules though direct photolysis, photosensitization, and indirect processes, often leading to complex radical chemistry that can increase molecular complexity in the environment. α-Keto acids act as photoinitiators for organic species that are not themselves photoactive. Here, we demonstrate this capability through the reaction of two α-keto acids, pyruvic acid and 2-oxooctanoic acid, with a series of fatty acids and fatty alcohols. We show for five different cases that a cross-product between the photoinitiated α-keto acid and non-photoactive species is formed during photolysis in aqueous solution. Fatty acids and alcohols are relatively unreactive species, which suggests that α-keto acids are able to act as radical initiators for many atmospherically relevant molecules found in the sea surface microlayer and on atmospheric aerosol particles.
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Biochemistry
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ACS Cent. Sci. 2018, 4, 5, 624–630
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https://doi.org/10.1021/acscentsci.8b00124
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Journal Article
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urn:sha256:af6bf99d4b2b293054be5ac78887f58fc620c23d4415605de6021f7f9cee5472
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Environmental Processing of Lipids Driven by Aqueous Photochemistry of α-Keto Acids

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