POTENTIOMETRIC STUDY ON STABILITY OF SURFACTANT PLUS BETA-CYCLODEXTRIN COMPLEXES

被引：54

作者：

JEZEQUEL, D ^{[1
]}

MAYAFFRE, A ^{[1
]}

LETELLIER, P ^{[1
]}

机构：

[1] UNIV PARIS 06,ENERGET & REACT INTERFACES LAB,BAT F,8 RUE CUVIER,F-75231 PARIS 05,FRANCE

来源：

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE | 1991年 / 69卷 / 12期

关键词：

SURFACTANT; BETA-CYCLODEXTRIN; SELECTIVE ELECTRODES; COMPLEXATION CONSTANTS; POTENTIOMETRIC STUDY;

D O I：

10.1139/v91-270

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The complexation constants K of beta-cyclodextrin with 13 ammonium surfactants were determined by a potentiometric method using electrodes selective to amphiphilic ions. Especially for C12, C14, and C16 tails, a model that provides for the formation of a second complex (beta-CD)2M+, with a K1/K2 ratio of about 600, provides a good fit with the experimental curves. Results show a poor influence of the polar group, for example in the case of the dodecyl chain. On the other hand, the pK1 values and the hydrophobic tail length are linked by a linear relation up to n = 12 carbon atoms; beyond, pK1 ends to be proportionally smaller and pK2 more important.

引用

页码：1865 / 1871

页数：7

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