Issue 26, 2016

Photodynamics of potent antioxidants: ferulic and caffeic acids


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

Supplementary files

Article information

Article type
08 Mar 2016
02 Jun 2016
First published
07 Jun 2016
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2016,18, 17691-17697

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

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity