A QUANTITATIVE TREATMENT OF MICELLAR EFFECTS UPON DEPHOSPHORYLATION BY THE HYDROPEROXIDE ANION

被引：26

作者：

BUNTON, CA

FOROUDIAN, HJ

机构：

[1] Department of Chemistry, University of California, Santa Barbara

来源：

LANGMUIR | 1993年 / 9卷 / 11期

关键词：

D O I：

10.1021/la00035a018

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dephosphorylation of p-nitrophenyl diphenyl phosphate by the hydroperoxide ion (HO2-) is speeded by micelles of cetyl trimethylammonium chloride and mesylate (CTACl and CTAOMs). Added Cl- competes with HO2- at the micellar surface and almost completely eliminates the micellar rate enhancement. The micellar and salt effects are fitted by a pseudophase model in which the concentration of HO2- at the micellar surface is calculated by solving the Poisson-Boltzmann equation in spherical symmetry. The calculated second-order rate constant at the micellar surface is lower than that in water by a factor of ca. 5.

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页码：2832 / 2835

页数：4

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