PHOTOSTABILIZATION OF RESVERATROL WITH ALKOXYCRYLENE COMPOUNDS

摘要

The photostabilizing electronic excited state energy - particularly singlet state energy from resveratrol compounds - has been found to be readily transferred to (accepted by) α- cyanodiphenylacrylate compounds having an alkoxy radical in the four (para) position (hereinafter "alkoxycrylenes") on one of the phenyl rings having the formula (I): wherein one of R₁ and R₂ is a straight or branched chain C₁-C₃₀ alkoxy radical, preferably C₁-C₈, more preferably methoxy, and the non-alkoxy radical R₁ or R₂ is hydrogen; and R₃ is a straight or branched chain C₁-C₃₀ alkyl radical, preferably C₂-C₂₀. The alkoxycrylene compounds of formula (I) significantly increase the photostability of resveratrol compounds in a composition by at least 3-fold and as much as 10-fold or greater. The ability of the alkoxycrylene compounds to stabilize the resveratrol compound is concentration dependent, with the amount of resveratrol photostabilization increasing with the concentration of the alkoxycrylene compound.