Aminolysis reactions by glycine in AOT-based water-in-oil microemulsions

被引：3
|
作者：
García-Río, L
Mejuto, JC
Pérez-Lorenzo, M
机构：
[1] Univ Santiago de Compostela, Dpto Quim Fis, Fac Quim, Santiago De Compostela 15782, Spain
[2] Univ Vigo, Dpto Quim Fis, Fac Quim, Vigo 36200, Spain
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2005年 / 270卷
关键词：
kinetics; aminolysis; microemulsions; reactivity;
D O I：
10.1016/j.colsurfa.2005.05.048
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A kinetic study was carried out on the aminolysis of p-nitrophenyl acetate (NPA) by glycine (GLY) in AOT/isooctane/water (w/o) microemulsions. The experimental results show that the reaction by GLY occurs mostly in the aqueous microdroplet. On the basis of the analysis of the kinetic data, we have calculated the rate constants in the aqueous microdroplet, k(2)(w), and it can be observed that these increase as the water content of the system decreases. In the aqueous microdroplet, the predominant interaction Na+...OH2 causes a decrease in the strength of the hydrogen bonds and therefore facilitates the desolvation of the reagents as W decreases. This desolvation of the reagents causes the increase of k(2)(w) as W decreases. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：115 / 123
页数：9
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