Surface potentials and ion binding in tetradecyltrimethylammonium bromide/sodium salicylate micellar solutions

被引：65

作者：

Cassidy, MA ^{[1
]}

Warr, GG ^{[1
]}

机构：

[1] UNIV SYDNEY,SCH CHEM,SYDNEY,NSW 2006,AUSTRALIA

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1996年 / 100卷 / 08期

关键词：

D O I：

10.1021/jp952996j

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：

Surface potentials of mixtures of tetradecyltrimethylammonium bromide and sodium salicylate have been determined by titration of a micelle-bound indicator, 4-heptadecyl-7-hydroxycoumarin. We find that the strong binding of salicylate ion is effective at lowering the surface potential of the micelles but see no evidence for charge reversal as recently reported on the basis of electrokinetic measurements (Imae and Kohsaka. J. Phys. Chem. 1992, 96, 10030). Results are compared with models and previous results for salicylate binding to micelles.

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页码：3237 / 3240

页数：4

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