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Ultrafast Photoprotecting Sunscreens in Natural Plants

Lewis Baker 1 Michael D. Horbury 1 Simon E. Greenough 1 Florent Allais 2, 3 Patrick S. Walsh 4 Scott Habershon 1 Vasilios G. Stavros 1
1 Department of Chemistry University of Warwick
2 GMPA - Génie et Microbiologie des Procédés Alimentaires
3 ABI - Agro-Biotechnologies Industrielles
4 Department of Chemistry
Abstract : We explore the ultrafast photoprotective properties of a series of sinapic acid derivatives in a range of solvents, utilizing femtosecond transient electronic absorption spectroscopy. We find that a primary relaxation mechanism displayed by the plant sunscreen sinapoyl malate and other related molecular species may be understood as a multistep process involving internal conversion of the initially photoexcited 11ππ* state along a trans–cis photoisomerization coordinate, leading to the repopulation of the original trans ground-state isomer or the formation of a stable cis isomer.
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https://hal-agroparistech.archives-ouvertes.fr/hal-01598628
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Submitted on : Friday, September 29, 2017 - 5:24:05 PM
Last modification on : Wednesday, May 27, 2020 - 11:48:02 PM

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Lewis Baker, Michael D. Horbury, Simon E. Greenough, Florent Allais, Patrick S. Walsh, et al.. Ultrafast Photoprotecting Sunscreens in Natural Plants. Journal of Physical Chemistry Letters, American Chemical Society, 2016, 7 (1), pp.56 - 61. ⟨10.1021/acs.jpclett.5b02474⟩. ⟨hal-01598628⟩

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