Micellar kinetics of hydrolysis of hydroxamic acids in zwitterionic sulfobetaine surfactants

被引：14

作者：

Ghosh, KK ^{[1
]}

Pandey, A ^{[1
]}

Roy, S ^{[1
]}

机构：

[1] Ravishankar Univ, Sch Studies Chem, Raipur 492010, Madhya Pradesh, India

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2000年 / 163卷 / 2-3期

关键词：

hydroxamic acid; zwitterionic surfactants; hydrolysis; sulfobetaine micelles;

D O I：

10.1016/S0927-7757(99)00343-X

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：

The effect of zwitterionic micelles of dodecyldimethylammonio-propane-sulfonate (SB3-12) and hexadecyldimethyl-ammonio-propanesulfonate (SB3-16) [CnH2n+1N+Me2(CH2)(3)SO3-, SB3-n, n=12, 16] on the acid and alkaline hydrolyses of some C- and N-substituted hydroxamic acids (RCON(OH)R') have been studied at 55 degrees C in 5% (v/v) dioxane medium. For acid hydrolysis zwitterionic micelles inhibit the reaction whereas for alkaline hydrolysis, zwitterionic micelles accelerate the rate of hydrolysis. Kinetic data corresponding to the reaction with micelles are analyzed by using the Menger and Portnoy model. Binding constant and first order rate constant for the reaction in micellar pseudophase and in water obtained from kinetic analysis, are reported. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：293 / 300

页数：8

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