Characteristic Photoprotective Molecules from the Sphagnum World: A Solution-Phase Ultrafast Study of Sphagnic Acid

Michael Hymas; Irene Casademont-Reig; Stéphane Poigny; Vasilios G. Stavros; Diego Sampedro

doi:10.3390/molecules28166153

Characteristic Photoprotective Molecules from the Sphagnum World: A Solution-Phase Ultrafast Study of Sphagnic Acid

Michael Hymas, Irene Casademont-Reig, Stéphane Poigny^*, Vasilios G. Stavros^*, Diego Sampedro (Editor)

^*Corresponding author for this work

Chemistry

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Abstract

A natural UV-absorbing chromophore extracted from sphagnum mosses, sphagnic acid, is proposed as a new natural support to chemical UV filters for use in cosmetic applications. Sphagnic acid is structurally related to the cinnamate family of molecules, known for their strong UV absorption, efficient non-radiative decay, and antioxidant properties. In this study, transient electronic absorption spectroscopy is used, in conjunction with steady-state techniques, to model the photodynamics following photoexcitation of sphagnic acid in different solvent systems. Sphagnic acid was found in each system to relax with lifetimes of ~200 fs and ~1.5 ps before generating a cis-isomer photoproduct. This study helps to elucidate the photoprotective mechanism of a new potential natural support to sunscreens, from a unique plant source.

Original language	English
Article number	6153
Number of pages	12
Journal	Molecules
Volume	28
Issue number	16
DOIs	https://doi.org/10.3390/molecules28166153
Publication status	Published - 21 Aug 2023

Keywords

photophysics
photoprotection
photochemistry
ultrafast spectroscopy
sphagnum moss
avobenzone
sunscreen

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Cite this

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title = "Characteristic Photoprotective Molecules from the Sphagnum World: A Solution-Phase Ultrafast Study of Sphagnic Acid",

abstract = "A natural UV-absorbing chromophore extracted from sphagnum mosses, sphagnic acid, is proposed as a new natural support to chemical UV filters for use in cosmetic applications. Sphagnic acid is structurally related to the cinnamate family of molecules, known for their strong UV absorption, efficient non-radiative decay, and antioxidant properties. In this study, transient electronic absorption spectroscopy is used, in conjunction with steady-state techniques, to model the photodynamics following photoexcitation of sphagnic acid in different solvent systems. Sphagnic acid was found in each system to relax with lifetimes of ~200 fs and ~1.5 ps before generating a cis-isomer photoproduct. This study helps to elucidate the photoprotective mechanism of a new potential natural support to sunscreens, from a unique plant source.",

keywords = "photophysics, photoprotection, photochemistry, ultrafast spectroscopy, sphagnum moss, avobenzone, sunscreen",

author = "Michael Hymas and Irene Casademont-Reig and St{\'e}phane Poigny and Stavros, {Vasilios G.} and Diego Sampedro",

year = "2023",

month = aug,

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doi = "10.3390/molecules28166153",

language = "English",

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journal = "Molecules",

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T2 - A Solution-Phase Ultrafast Study of Sphagnic Acid

AU - Hymas, Michael

AU - Casademont-Reig, Irene

AU - Poigny, Stéphane

AU - Stavros, Vasilios G.

A2 - Sampedro, Diego

PY - 2023/8/21

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N2 - A natural UV-absorbing chromophore extracted from sphagnum mosses, sphagnic acid, is proposed as a new natural support to chemical UV filters for use in cosmetic applications. Sphagnic acid is structurally related to the cinnamate family of molecules, known for their strong UV absorption, efficient non-radiative decay, and antioxidant properties. In this study, transient electronic absorption spectroscopy is used, in conjunction with steady-state techniques, to model the photodynamics following photoexcitation of sphagnic acid in different solvent systems. Sphagnic acid was found in each system to relax with lifetimes of ~200 fs and ~1.5 ps before generating a cis-isomer photoproduct. This study helps to elucidate the photoprotective mechanism of a new potential natural support to sunscreens, from a unique plant source.

AB - A natural UV-absorbing chromophore extracted from sphagnum mosses, sphagnic acid, is proposed as a new natural support to chemical UV filters for use in cosmetic applications. Sphagnic acid is structurally related to the cinnamate family of molecules, known for their strong UV absorption, efficient non-radiative decay, and antioxidant properties. In this study, transient electronic absorption spectroscopy is used, in conjunction with steady-state techniques, to model the photodynamics following photoexcitation of sphagnic acid in different solvent systems. Sphagnic acid was found in each system to relax with lifetimes of ~200 fs and ~1.5 ps before generating a cis-isomer photoproduct. This study helps to elucidate the photoprotective mechanism of a new potential natural support to sunscreens, from a unique plant source.

KW - photophysics

KW - photoprotection

KW - photochemistry

KW - ultrafast spectroscopy

KW - sphagnum moss

KW - avobenzone

KW - sunscreen

U2 - 10.3390/molecules28166153

DO - 10.3390/molecules28166153

M3 - Article

SN - 1420-3049

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JF - Molecules

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ER -

Characteristic Photoprotective Molecules from the Sphagnum World: A Solution-Phase Ultrafast Study of Sphagnic Acid

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Keywords

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