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Photodynamics of potent antioxidants : ferulic and caffeic acids

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Horbury, Michael D., Baker, Lewis A., Quan, Wen-Dong, Greenough, Simon E. and Stavros, Vasilios G. (2016) Photodynamics of potent antioxidants : ferulic and caffeic acids. Physical Chemistry Chemical Physics, 18 (26). pp. 17691-17697. doi:10.1039/C6CP01595F

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Official URL: http://dx.doi.org/10.1039/C6CP01595F

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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 trans–cis 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.

Item Type: Journal Article
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Science > Chemistry
Library of Congress Subject Headings (LCSH): Antioxidants, Sunscreens (Cosmetics)
Journal or Publication Title: Physical Chemistry Chemical Physics
Publisher: Royal Society of Chemistry
ISSN: 1463-9076
Official Date: 7 June 2016
Dates:
DateEvent
7 June 2016Available
2 June 2016Accepted
8 March 2016Submitted
Volume: 18
Number: 26
Page Range: pp. 17691-17697
DOI: 10.1039/C6CP01595F
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: University of Warwick, Engineering and Physical Sciences Research Council (EPSRC), Royal Society (Great Britain)
Grant number: EP/F500378/1, EP/J007153 (EPSRC)

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