STABLE BLUE COMPLEXES OF ANTHOCYANIN-ALUMINUM-3-PARA-COUMAROYL-QUINIC OR 3-CAFFEOYL-QUINIC ACID INVOLVED IN THE BLUING OF HYDRANGEA FLOWER
STABLE BLUE COMPLEXES OF ANTHOCYANIN-ALUMINUM-3-PARA-COUMAROYL-QUINIC OR 3-CAFFEOYL-QUINIC ACID INVOLVED IN THE BLUING OF HYDRANGEA FLOWER
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DOI：
10.1016/0031-9422(90)85409-9
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发表时间：
1990-01-01
期刊：
影响因子：
3.8
通讯作者：
TIMBERLAKE, CF
中科院分区：
文献类型：
--
作者：
TAKEDA, K;YAMASHITA, T;TIMBERLAKE, CF
在对香豆酰奎尼酸的三种酯的行为的比较中，三种酯与绣球花花青素（飞燕草素-3-葡萄糖苷）和铝形成稳定的蓝色络合物; 4-和5-异构体无效。复合物的形成与3-咖啡酰奎宁酸的形成几乎相同。这两种三元配合物的溶液在室温下在pH 3.7时非常稳定。3-对香豆酰奎尼酸、铝和矢车菊素3-糖苷也出现了类似的颜色增强，但天竺葵素或锦葵素糖苷则没有。提出了具有花色素苷B环的邻二羟基和羧基和α-羟基的铝缀合物。奎尼酸部分的羟基，并且复合物以酰化花青素苷的方式稳定。
In a comparison of the behaviour of three esters of three esters of p-coumaroylquinic acid formed a stable blue complex with hydrangea anthocyanin (delphinidin-3-glucoside) and aluminium; the 4- and 5- isomers were ineffective. Complex formation was almost identical with that occurring with 3-caffeoylquinic acid. Solutions of both ternary complexes were very stable at pH 3.7 at room temperature. Similar colour augmentation occurred with 3-p-coumaroylquinic acid, aluminium and cyanidin 3-glycoside but not with pelargonidin or malvidin glucosides. It is proposed that aluminium conjugates with the ortho-dihydroxy group of the anthocyanin B ring and the carboxyl and .alpha.-hydroxyl groups of the quinic acid moiety and that the complexes are stabilized in the manner of acylated anthocyanins.