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Issue 26, 2016
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Photodynamics of potent antioxidants: ferulic and caffeic acids

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Abstract

The dynamics of ferulic acid (3-(4-hydroxy-3-methoxyphenyl)-2-propenoic acid) and caffeic acid (3-(3,4-dihydroxyphenyl)-2-propenoic acid) in acetonitrile, dioxane and water at pH 2.2 following photoexcitation to the first excited singlet state are reported. These hydroxycinnamic acids display both strong ultraviolet absorption and potent antioxidant activity, making them promising sunscreen components. Ferulic and caffeic acids have previously been shown to undergo transcis photoisomerization via irradiation studies, yet time-resolved measurements were unable to observe formation of the cis-isomer. In the present study, we are able to observe the formation of the cis-isomer as well as provide timescales of relaxation following initial photoexcitation.

Graphical abstract: Photodynamics of potent antioxidants: ferulic and caffeic acids

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Article information


Submitted
08 Mar 2016
Accepted
02 Jun 2016
First published
07 Jun 2016

This article is Open Access

Phys. Chem. Chem. Phys., 2016,18, 17691-17697
Article type
Paper

Photodynamics of potent antioxidants: ferulic and caffeic acids

M. D. Horbury, L. A. Baker, W. Quan, S. E. Greenough and V. G. Stavros, Phys. Chem. Chem. Phys., 2016, 18, 17691
DOI: 10.1039/C6CP01595F

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