Ultrafast photoprotective properties of the sunscreening agent octocrylene

Opt Express. 2016 May 16;24(10):10700-9. doi: 10.1364/OE.24.010700.

Abstract

Today octocrylene is one of the most common molecules included in commercially available sunscreens. It provides broadband photoprotection for the skin from incident UV-A and UV-B radiation of the solar spectrum. In order to understand how octocrylene fulfils its role as a sunscreening agent, femtosecond pump-probe transient electronic UV-visible absorption spectroscopy is utilised to investigate the ultrafastnonradiative relaxation mechanism of octocrylene in cyclohexane or methanol after UV-B photoexcitation. The data presented clearly shows that UV-B photoexcited octocrylene exhibits ultrafast-nonradiative relaxation mechanisms to repopulate its initial ground state within a few picoseconds, which, at the very least, photophysically justifies its wide spread inclusion in commercial sunscreens.

MeSH terms

  • Acrylates / chemistry*
  • Cyclohexanes
  • Photoelectron Spectroscopy*
  • Skin
  • Sunlight
  • Sunscreening Agents / chemistry*
  • Ultraviolet Rays*

Substances

  • Acrylates
  • Cyclohexanes
  • Sunscreening Agents
  • Cyclohexane
  • octocrylene