论文部分内容阅读
二乙烯苯交联的酯基树脂分别与乙二胺、二乙烯三胺、三乙烯四胺、四乙烯五胺发生胺解反应,将其胺端与乙酸酐进行酰化得到不同长度手臂的酰胺树脂,研究了其对罗布麻黄酮的纯化,发现二乙烯三胺手臂的酰胺树脂对黄酮选择性最好,将罗布麻黄酮纯度从17%提高到80%。利用吸附热力学研究其吸附机理,树脂对黄酮的等量吸附焓在氢键吸附范围内。通过红外光谱测定,发现树脂吸附罗布麻黄酮前后,酰胺基团的伸缩振动峰由1624.5cm~(-1)移动到了1619.6cm~(-1),移动了5个波长,说明酰胺树脂的酰胺基团与多酚类的黄酮分子之间形成了氢键作用,增强了其对黄酮化合物吸附选择性。
The divinylbenzene cross-linked ester-based resin was amidated with ethylenediamine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine to acylate its amine end with acetic anhydride to obtain the amides of arms of different lengths Resin, and its purification of Apiece was studied. It was found that amide resin of diethylenetriamine arm had the best selectivity to flavonoids and the purity of Apiece was increased from 17% to 80%. Adsorption thermodynamics was used to study the adsorption mechanism. The isosteric adsorption enthalpy of resin to flavonoids was within hydrogen bond adsorption range. By infrared spectroscopy, it was found that the stretching vibration peak of amide group moved from 1624.5cm -1 to 1619.6cm -1 before and after adsorption of the resin, which shifted by 5 wavelengths, indicating that the amide group of the amide resin The formation of a hydrogen bond between the lumps and the polyphenolic flavonoids enhances their selectivity for flavonoid adsorption.