Probing the Ultrafast Energy Dissipation Mechanism of the Sunscreen Oxybenzone after UVA Irradiation

被引：105

作者：

Baker, Lewis A. ^{[1
]}

Horbury, Michael D. ^{[1
]}

Greenough, Simon E. ^{[1
]}

Coulter, Philip M. ^{[2
]}

Karsili, Tolga N. V. ^{[2
]}

Roberts, Gareth M. ^{[2
]}

Orr-Ewing, Andrew J. ^{[2
]}

Ashfold, Michael N. R. ^{[2
]}

Stavros, Vasilios G. ^{[1
]}

机构：

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

[2] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2015年 / 6卷 / 08期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

PROTON-TRANSFER PROCESSES; DYNAMICS; ADENINE; CONTROVERSIES;

D O I：

10.1021/acs.jpclett.5b00417

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Oxybenzone is a common constituent of many commercially available sunscreens providing photoprotection from ultraviolet light incident on the skin. Femtosecond transient electronic and vibrational absorption spectroscopies have been used to investigate the nonradiative relaxation pathways of oxybenzone in cyclohexane and methanol after excitation in the UVA region. The present data suggest that the photoprotective properties of oxybenzone can be understood in terms of an initial ultrafast excited state enol -> keto tautomerization, followed by efficient internal conversion and subsequent vibrational relaxation to the ground state (enol) tautomer.

引用

页码：1363 / 1368

页数：6

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