REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade do Porto , Rua do Campo Alegre, 687 , 4169-007 Porto , Portugal.
J Agric Food Chem. 2018 Sep 26;66(38):10003-10010. doi: 10.1021/acs.jafc.8b03536. Epub 2018 Sep 18.
Anthocyanins are water-soluble pigments with limited application in lipophilic matrices such as lipid-based foods and cosmetic formulations. In this work, the liposolubility improvement of cyanidin-3-glucoside (cy3glc) was performed by enzymatic esterification with saturated fatty acids with variable chain lengths, and their thermostabilities were evaluated at different pH values in a lipophilic medium (an aqueous sodium dodecyl sulfate solution) by means of UV-vis spectroscopy. Overall, lipophilic cy3glc derivatives showed improved color stability and lowered sensitivity to thermal degradation than nonmodified cy3glc in an SDS micellar solution between pH 3 and 7.
花色苷是一种水溶性色素，在脂溶性基质（如含脂类的食物和化妆品配方）中的应用有限。在这项工作中，通过用具有不同链长的饱和脂肪酸对矢车菊素-3-葡萄糖苷（cy3glc）进行酶酯化，提高了其脂溶性，并通过紫外可见光谱在脂相介质（十二烷基硫酸钠水溶液）中不同 pH 值下评估了它们的热稳定性。总的来说，与未修饰的 cy3glc 相比，在 SDS 胶束溶液的 pH 3 到 7 之间，脂溶性 cy3glc 衍生物具有更好的颜色稳定性和更低的热降解敏感性。
