EFFECT OF ASSOCIATION OF SULFONEPHTHALEIN DYES WITH SODIUM DODECYL-SULFATE MICELLES ON THEIR ACID-BASE EQUILIBRIA

被引：32

作者：

DUTTA, RK ^{[1
]}

CHOWDHURY, R ^{[1
]}

BHAT, SN ^{[1
]}

机构：

[1] NE HILL UNIV, DEPT CHEM, SHILLONG 793003, MEGHALAYA, INDIA

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1995年 / 91卷 / 04期

关键词：

D O I：

10.1039/ft9959100681

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 association of some sulfonephthalein indicator dyes with sodium dodecyl sulfate micelles has been investigated by visible absorption spectroscopy. The equilibrium constants of the associations have been determined and found to increase considerably with the increase in the hydrophobicity of the dyes. The effect of such association on the pK(a2) of the dyes at various concentrations of the surfactant has been studied for Bromothymol Blue and Thymol Blue. The pK(a2),(app) values of the dyes at various concentrations of the surfactant were predicted from the equilibrium constants and were also determined experimentally. An attempt has been made to account for the discrepancies observed between the experimental and the predicted values.

引用

页码：681 / 686

页数：6

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