...
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Determination of the pK(a) Values of trans-Resveratrol, a Triphenolic Stilbene, by Singular Value Decomposition. Comparison with Theory
【24h】

Determination of the pK(a) Values of trans-Resveratrol, a Triphenolic Stilbene, by Singular Value Decomposition. Comparison with Theory

机译:通过单数值分解测定转霉醇,三苯酚芪的PK(A)值。 与理论比较

获取原文
获取原文并翻译 | 示例
           

摘要

Several independent determinations of the pK(a) values of transresveratrol in water have led to conflicting results. Singular value decomposition analysis of UV absorption spectra of trans-resveratrol (t-Resv) in N-2-outgased aqueous solutions buffered to pH values in the 7.0-13.6 range yielded the UV spectra of the three anionic forms and the corresponding pK(a) values: pK(a1), = 9.1(6), pK(a2) = 9.7(7), and pK(a3) = 10.5(5) in very good agreement with calculated theoretical values. The analysis of the absorption spectra guided the assignment of the fluorescence spectrum of each anionic form. With the resolved spectra on hand, we applied the Forster equation to estimate pK(a)* values of 2.5 and 0, respectively, for the p- and m-OH substituents of t-Resv in S-1. Theory supports a proposed mechanism for the reaction of t-Resv anions with O-2.
机译:在水中转基因的PK(a)值的几个独立测定导致了突出的结果。 在7.0-13.6范围内缓冲到pH值的N-2除凝水溶液中的逆变白藜芦醇(T-Resv)的单数值分解分析,得到了三个阴离子形式的UV光谱和相应的PK(a )值:PK(A1),= 9.1(6),PK(A2)= 9.7(7),以及PK(A3)= 10.5(5)与计算的理论值非常好。 对吸收光谱的分析引导了每种阴离子形式的荧光光谱的分配。 通过手头的分辨光谱,我们将Forster方程应用于S-1中T-Resv的P-and M-OH取代基的PK(A)*值为2.5和0。 理论支持具有O-2的T-Resv阴离子反应的提出机制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号