The peculiarity of malvidin 3-O-(6-O-p-coumaroyl) glucoside aggregation. Intra and intermolecular interactions
The peculiarity of malvidin 3-O-(6-O-p-coumaroyl) glucoside aggregation. Intra and intermolecular interactions
复制标题
DOI：
10.1016/j.dyepig.2020.108382
复制
发表时间：
2020-09-01
影响因子：
4.5
通讯作者：
de Freitas, Victor
中科院分区：
文献类型：
--
作者：
Mendoza, Johan;Oliveira, Joana;de Freitas, Victor
本文报道了锦葵素3-O-（6-O-对香豆酰基）葡萄糖苷黄正离子（OeninCoum）在水中的聚集行为。用紫外-可见吸收光谱、核磁共振氢谱和圆二色谱对OeninCoum的分子内和分子间相互作用进行了表征。理论计算也进行了描述分子内相互作用。在更高的温度（>60 ℃）下，分子间聚集体被破坏，但归因于分子内相互作用的CD信号仍然存在。此外，Oenin和OeninCoum在50 ℃和25 ℃下的动力学和热力学数据表明，温度的升高使后者的奎宁碱稳定。
The aggregation of malvidin 3-O-(6-O-p-coumaroyl) glucoside flavylium cation (OeninCoum) in water is reported. Intra and intermolecular interactions of OeninCoum were characterized by UV-vis absorption, H-1 NMR and circular dichroism (CD). Theoretical calculations were also performed to describe the intramolecular interactions. At higher temperature (>60 degrees C) the intermolecular aggregates are disrupted but CD signal attributed to an intramolecular interaction remains.Moreover, the kinetic and thermodynamic data for Oenin and OeninCoum at 50 degrees C and 25 degrees C shows that the increase of temperature stabilizes the quinoidal base of this later.