Probing the ultrafast energy dissipation mechanism of the sunscreen oxybenzone after UVA irradiation

Lewis A. Baker; Michael D. Horbury; Simon E. Greenough; Philip M. Coulter; Tolga N V Karsili; Gareth M. Roberts; Andrew J. Orr-Ewing; Michael N R Ashfold; Vasilios G. Stavros

doi:10.1021/acs.jpclett.5b00417

Probing the ultrafast energy dissipation mechanism of the sunscreen oxybenzone after UVA irradiation

Lewis A. Baker
, Michael D. Horbury
, Simon E. Greenough
, Philip M. Coulter
, Tolga N V Karsili
, Gareth M. Roberts
, Andrew J. Orr-Ewing
, Michael N R Ashfold^*
, Vasilios G. Stavros

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

114 Citations (Scopus)

668 Downloads (Pure)

Abstract

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.

Original language	English
Pages (from-to)	1363-1368
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	6
Issue number	8
DOIs	https://doi.org/10.1021/acs.jpclett.5b00417
Publication status	Published - 26 Mar 2015

Bibliographical note

Date of Acceptance: 26/03/2015

Research Groups and Themes

Physical & Theoretical

Keywords

oxybenzone
sunscreens
transient absorption spectroscopy
ultrafast photochemistry

Access to Document

10.1021/acs.jpclett.5b00417

Manuscript_Mar_2015
“This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see dx.doi.org/10.1021/acs.jpclett.5b00417
Accepted author manuscript, 841 KB

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@article{f6f3a830b7274af2bd2210af043b7587,

title = "Probing the ultrafast energy dissipation mechanism of the sunscreen oxybenzone after UVA irradiation",

abstract = "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.",

keywords = "oxybenzone, sunscreens, transient absorption spectroscopy, ultrafast photochemistry",

author = "Baker, \{Lewis A.\} and Horbury, \{Michael D.\} and Greenough, \{Simon E.\} and Coulter, \{Philip M.\} and Karsili, \{Tolga N V\} and Roberts, \{Gareth M.\} and Orr-Ewing, \{Andrew J.\} and Ashfold, \{Michael N R\} and Stavros, \{Vasilios G.\}",

note = "Date of Acceptance: 26/03/2015",

year = "2015",

month = mar,

day = "26",

doi = "10.1021/acs.jpclett.5b00417",

language = "English",

volume = "6",

pages = "1363--1368",

journal = "Journal of Physical Chemistry Letters",

issn = "1948-7185",

publisher = "American Chemical Society",

number = "8",

}

TY - JOUR

T1 - Probing the ultrafast energy dissipation mechanism of the sunscreen oxybenzone after UVA irradiation

AU - Baker, Lewis A.

AU - Horbury, Michael D.

AU - Greenough, Simon E.

AU - Coulter, Philip M.

AU - Karsili, Tolga N V

AU - Roberts, Gareth M.

AU - Orr-Ewing, Andrew J.

AU - Ashfold, Michael N R

AU - Stavros, Vasilios G.

N1 - Date of Acceptance: 26/03/2015

PY - 2015/3/26

Y1 - 2015/3/26

N2 - 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.

AB - 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.

KW - oxybenzone

KW - sunscreens

KW - transient absorption spectroscopy

KW - ultrafast photochemistry

UR - https://www.scopus.com/pages/publications/84927921816

U2 - 10.1021/acs.jpclett.5b00417

DO - 10.1021/acs.jpclett.5b00417

M3 - Article (Academic Journal)

C2 - 26263136

AN - SCOPUS:84927921816

SN - 1948-7185

VL - 6

SP - 1363

EP - 1368

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 8

ER -

Probing the ultrafast energy dissipation mechanism of the sunscreen oxybenzone after UVA irradiation

Abstract

Bibliographical note

Research Groups and Themes

Keywords

Access to Document

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Chemical Applications of Velocity & Spatial Imaging

Emeritus Professor Michael N R Ashfold

Professor Andrew J Orr-Ewing

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Probing the ultrafast energy dissipation mechanism of the sunscreen oxybenzone after UVA irradiation

Abstract

Bibliographical note

Research Groups and Themes

Keywords

Access to Document

Handle.net

Other files and links

Fingerprint

Projects

Chemical Applications of Velocity & Spatial Imaging

Profiles

Emeritus Professor Michael N R Ashfold

Professor Andrew J Orr-Ewing

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