Original Research ARTICLE
Exploring the photochemistry of an ethyl sinapate dimer: An attempt towards a better ultraviolet filter
- 1University of Leeds, United Kingdom
- 2University of Warwick, United Kingdom
- 3University of Oxford, United Kingdom
- 4AgroParisTech Institut des Sciences et Industries du Vivant et de L'environnement, France
The photochemistry and photostability of a potential ultraviolet (UV) radiation filter, dehydrodiethylsinapate, with a broad absorption in the UVA region, is explored utilizing a combination of femtosecond time-resolved spectroscopy and steady-state irradiation studies. The time-resolved measurements show that this UV filter candidate undergoes excited state relaxation after UV absorption on a timescale of ~10 picoseconds, suggesting efficient relaxation. However, steady-state irradiation measurements show degradation under prolonged UV exposure. From a photochemical standpoint, this highlights the importance of considering both the ultrafast and “ultraslow” timescales when designing new potential UV filters.
Keywords: photoprotecion, Ultrafast, spectroscopy, UVA filter, Femtosecond
Received: 22 Apr 2020;
Accepted: 17 Jun 2020.
Copyright: © 2020 Horbury, Turner, Peters, Mention, Flourat, Hine, Allais and Stavros. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Dr. Michael Horbury, University of Leeds, Leeds, United Kingdom, M.D.Horbury@leeds.ac.uk
Prof. Vasilios Stavros, University of Warwick, Coventry, CV4 7AL, West Midlands, United Kingdom, V.Stavros@warwick.ac.uk