Photophysics and hydrolytic stability of betalains in aqueous trifluoroethanol

被引：25

作者：

Bartoloni, Fernando H. ^{[2
]}

Goncalves, Leticia Christina P. ^{[2
]}

Rodrigues, Ana Clara B. ^{[2
]}

Doerr, Felipe Augusto ^{[3
]}

Pinto, Ernani ^{[3
]}

Bastos, Erick L. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo, Brazil

[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210580 Sao Paulo, Brazil

[3] Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Anal Clin & Toxicol, BR-05508900 Sao Paulo, Brazil

来源：

MONATSHEFTE FUR CHEMIE | 2013年 / 144卷 / 04期

基金：

巴西圣保罗研究基金会;

关键词：

Natural pigments; Dyes; Hydrolysis; Schiff bases; Solvent effect; BETACYANIN PIGMENTS; FLUORESCENCE; NMR;

D O I：

10.1007/s00706-012-0883-5

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Betalains are natural antioxidant pigments responsible for the visible fluorescence of flowers. Although these compounds are almost exclusively soluble in water, they are very sensitive to both hydrolysis and water-catalyzed isomerization. We show that three representative betalains are soluble in 2,2,2-trifluoroethanol (TFE) and that the hydrolytic stability of these model compounds in hydroalcoholic solutions increases with increasing amount of TFE. Furthermore, TFE increases the fluorescence quantum yields of betaxanthins. .

引用

页码：567 / 571

页数：5

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