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

被引：1

作者：

Hymas, Michael ^{[1
]}

Casademont-Reig, Irene ^{[1
,2
]}

Poigny, Stephane ^{[3
]}

Stavros, Vasilios G. ^{[1
,4
]}

机构：

[1] Univ Warwick, Dept Chem, Coventry CV4 7AL, England

[2] Vrije Univ Brussel VUB, Dept Gen Chem ALGC, Pleinlaan 2, B-1050 Brussels, Belgium

[3] Mibelle AG, Mibelle Grp Biochem, Bolimattstr 1, CH-5033 Buchs, Switzerland

[4] Univ Birmingham, Sch Chem, Birmingham B15 2TT, England

来源：

MOLECULES | 2023年 / 28卷 / 16期

关键词：

sphagnum moss; avobenzone; sunscreen; photoprotection; ultrafast spectroscopy; photophysics; photochemistry; AB-INITIO; ULTRAVIOLET-RADIATION; BASIS-SETS; SUNSCREEN; PHOTOISOMERIZATION; ABSORPTION; CONTINUUM; DYNAMICS; EXTRACTS; FILTERS;

D O I：

10.3390/molecules28166153

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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 similar to 200 fs and similar to 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.

引用

页数：12