姜黄素和姜黄素类的研究。XXXIX. 双去甲氧基姜黄素的光物理性质。
Studies on curcumin and curcuminoids. XXXIX. Photophysical properties of bisdemethoxycurcumin.
机构信息
Department of Physics and Mathematics, University of Insubria and C.N.I.S.M.-C.N.R., Via Valleggio, 11- 22100 Como, Italy.
出版信息
J Fluoresc. 2011 Mar;21(2):627-35. doi: 10.1007/s10895-010-0750-x. Epub 2010 Oct 16.
Abstract
The steady-state absorption and fluorescence, as well as the time-resolved fluorescence properties of bisdemethoxycurcumin dissolved in several solvents differing in polarity and H-bonding capability were measured. The photodegradation quantum yield of the compound in acetonitrile and methanol was determined. The bisdemethoxycurcumin decay mechanisms from the S(1) state were discussed and compared with those of curcumin. The differences in S(1) dynamics observed between bisdemethoxy-curcumin and curcumin could be ascribed to a difference in H-bond acceptor/donor properties of the phenolic OH and a difference in strength of the intramolecular H-bond in the keto-enol moiety within the two molecules.
摘要
测定了双甲氧基姜黄素在几种极性和氢键能力不同的溶剂中的稳态吸收和荧光以及时间分辨荧光性质。测定了该化合物在乙腈和甲醇中的光降解量子产率。讨论了化合物从 S(1)态的衰减机制，并与姜黄素的衰减机制进行了比较。双甲氧基姜黄素与姜黄素之间观察到的 S(1)动力学差异可归因于酚羟基的氢键供体/受体性质的差异以及两种分子中酮-烯醇部分的分子内氢键强度的差异。
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