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Ultrafast Photoprotecting Sunscreens in Natural Plants

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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Submitted on : Friday, September 29, 2017 - 5:24:05 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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