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  • The role of symmetric functionalisation on photoisomerisation of a UV commercial chemical filter.

The role of symmetric functionalisation on photoisomerisation of a UV commercial chemical filter.

Physical chemistry chemical physics : PCCP (2019-02-01)
Jack M Woolley, Jack S Peters, Matthew A P Turner, Guy J Clarkson, Michael D Horbury, Vasilios G Stavros
ANOTACE

Photoisomerisation has been shown to be an efficient excited-state relaxation mechanism for a variety of nature-based and artificial-based molecular systems. Here we report on the excited-state relaxation dynamics and consequent photostability of a symmetrically functionalised cinnamate by transient electronic absorption spectroscopy, along with complementary computational and steady-state spectroscopy methods. The findings are then discussed in comparison to 2-ethylhexyl-E-4-methoxycinnamate, a structurally related 'off the shelf' chemical filter present in commercial sunscreens with a similar absorption profile. The present study allows for a like-for-like comparison beween 2-ethylhexyl-E-4-methoxycinnamate and the functionalised cinnamate, driven by the need to enhance solar protection across both the UVA and UVB regions of the electromagnetic spectrum.