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Ultrafast photophysical studies of a multicomponent sunscreen: Oxybenzone–titanium dioxide mixtures

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)39-43
Number of pages5
JournalChemical Physics Letters
Volume664
Early online date4 Oct 2016
DOIs
StatePublished - 1 Nov 2016

Abstract

Recent studies of the sunscreen constituent oxybenzone have suggested that the dominant mechanism underlying the efficient photoprotection it offers relies on an initial ultrafast enol → keto tautomerisation, followed by nonadiabatic transfer to the ground electronic state. Subsequent collisions with the solvent bath then reform the original enol tautomer. Utilising femtosecond transient electronic absorption spectroscopy we explore the dissipation of electronic excitation energy in oxybenzone in the presence of titanium dioxide, a widely used, and complementary sunscreen component. We find the relaxation dynamics of this popular organic filter are unaltered by the presence of this favoured inorganic scatterer and the overall dynamics can be described by the additive contribution of the individual constituents. The combination of the two components provides broadband photoprotective properties justifying the widely used organic filter and inorganic scatterer mixtures in commercial sunscreen products.

    Research areas

  • Oxybenzone, Titanium dioxide, Sunscreens, Transient absorption spectroscopy, Ultrafast photochemistry, Solution phase

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Documents

  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at http://www.sciencedirect.com/science/article/pii/S0009261416307710. Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 1 MB, PDF-document

    License: CC BY-NC-ND

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