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

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)1363-1368
Number of pages6
JournalJournal of Physical Chemistry Letters
Issue number8
DatePublished - 26 Mar 2015


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.

Additional information

Date of Acceptance: 26/03/2015

    Research areas

  • oxybenzone, sunscreens, transient absorption spectroscopy, ultrafast photochemistry

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  • Manuscript_Mar_2015

    Rights statement: “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

    Accepted author manuscript, 840 KB, PDF document


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