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 ORCID: https://orcid.org/0000-0002-5470-0278 and Vaida, Veronica 2018. Environmental processing of lipids driven by aqueous photochemistry of α-Keto acids. ACS Central Science 4 (5) , pp. 624-630. 10.1021/acscentsci.8b00124

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Abstract

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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Advanced Research Computing @ Cardiff (ARCCA)
Publisher:	American Chemical Society: Open Access Titles / American Chemical Society
ISSN:	2374-7951
Date of First Compliant Deposit:	11 June 2018
Date of Acceptance:	18 April 2018
Last Modified:	04 May 2023 00:39
URI:	https://orca.cardiff.ac.uk/id/eprint/112190

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