The role of symmetric functionalisation on photoisomerisation of a UV commercial chemical filter Electronic supplementary information (ESI) available: 1H and 13C NMR spectra, crystallographic data, computed structures, additional transient absorption, and steady-state spectra, fitting residuals, fluorescence quantum yields and power dependency measurements. See DOI:; 10.1039/c8cp06536e

被引：10

作者：

Woolley, Jack M. ^{[1
]}

Peters, Jack S. ^{[1
]}

Turner, Matthew A. P. ^{[1
,2
]}

Clarkson, Guy J. ^{[1
]}

Horbury, Michael D. ^{[1
]}

Stavros, Vasilios G. ^{[1
]}

机构：

[1] Univ Warwick, Dept Chem, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[2] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2019年 / 21卷 / 26期

基金：

英国工程与自然科学研究理事会;

关键词：

DNA-DAMAGE; ULTRAFAST DYNAMICS; FERULIC ACID; ANTIOXIDANT; PHOTOPROTECTION; BENZOPHENONE-3; OXYBENZONE; SUNSCREENS; PROTECTION; EXPOSURE;

D O I：

10.1039/c8cp06536e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：14350 / 14356

页数：7