Aggregation and catalytic activity of 2-hydroxybenzylated polyethyleneimines in water-organic solutions
作者:G. A. Gaynanova、A. V. Yurina、S. S. Lukashenko、E. P. Zhil’tsova、L. Ya. Zakharova、L. A. Kudryavtseva、A. I. Konovalov
DOI:10.1007/s11172-010-0243-8
日期:2010.7
The aggregation of 2-hydroxybenzylated derivatives of polyethyleneimine in a water—DMF medium in the absence and in the presence of cationic surfactants was studied. The catalytic activity of modified polyethyleneimines in hydrolysis of phosphorus acid esters depends on the pH of the medium and increases with the formation of polymer-colloidal complexes. The polymer-colloidal complexes based on surfactants with two hydroxyethyl substituents in the head group have the maximum catalytic activity (increase in the reaction rate by up to three orders of magnitude).
研究了聚乙烯亚胺的 2-羟基苄基衍生物在没有阳离子表面活性剂和有阳离子表面活性剂的情况下在水-DMF 介质中的聚集情况。改性聚乙烯亚胺在水解磷酸酯时的催化活性取决于介质的 pH 值,并随着聚合物胶体复合物的形成而增加。以头基中含有两个羟乙基取代基的表面活性剂为基础的聚合物-胶体复合物具有最大的催化活性(反应速率最多可提高三个数量级)。