Evidence for copigmentation interactions between deoxyanthocyanidin derivatives (oaklins) and common copigments in wine model solutions.
Evidence for copigmentation interactions between deoxyanthocyanidin derivatives (oaklins) and common copigments in wine model solutions.
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DOI：
10.1021/jf404640m
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发表时间：
2014-01
影响因子：
6.1
通讯作者：
André M. M. Sousa-André-M.-M.-Sousa-7897363;Paula A. Araújo;L. Cruz;Natércia F. Brás;N. Mateus;V. de Freitas
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文献类型：
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作者：
André M. M. Sousa-André-M.-M.-Sousa-7897363;Paula A. Araújo;L. Cruz;Natércia F. Brás;N. Mateus;V. de Freitas
本研究的目的是调查可能发生在红葡萄酒之间的相互作用的橡树林，这是脱氧花青素衍生物（愈创木基儿茶素-吡喃），和几个辅色素：儿茶素（CP 1），表儿茶素（CP 2），绿原酸（CP 3），表没食子儿茶素（CP 4），原花青素B3（CP 5）。结果表明，橡树林，像常见的花青素，也提出了共色素相互作用，进一步稳定的水醇溶液中的黄阳离子。还进行了分子动力学模拟来解释结合数据，以指定复合物内的颜料和copigment分子的相对排列，并解释其在可见光范围内的吸收特性。
The aim of this study was to investigate interactions possibly taking place in red wine between oaklins, which are deoxyanthocyanidin derivatives (guaiacylcatechin-pyrylium and syringylcatechin-pyrylium), and several copigments: catechin (CP1), epicatechin (CP2), chlorogenic acid (CP3), epigallocatechin (CP4), and procyanidin B3 (CP5). The results show that oaklins, like common anthocyanins, also present copigmentation interactions that further stabilize the flavylium cation in hydroalcoholic solutions. Molecular dynamics simulations were also performed to interpret the binding data, to specify the relative arrangement of the pigment and copigment molecules within the complexes, and to interpret their absorption properties in the visible range.