Study of inclusion complex formation between a homologous series of n-alkyltrimethylammonium bromides and β-cyclodextrin, using conductometric technique

被引：55
|
作者：
Rafati, AA
Bagheri, A
Iloukhani, H
Zarinehzad, M
机构：
[1] Bu Ali Sina Univ, Fac Sci, Dept Chem, Hamadan, Iran
[2] Emam Hossein Univ, Fac Sci, Dept Chem, Tehran, Iran
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2005年 / 116卷 / 01期
关键词：
inclusion complex; surfactant; alkyltrimethylammonium bromide; cyclodextrin; conductometry;
D O I：
10.1016/j.molliq.2004.05.003
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 behaviour of the inclusion complex based on a homologous series of n-alkyltrimethylammonium bromides and beta-cyclodextrin (beta-CD) were studied using conductometric technique. Association constants have been determined for S(CD) and S(CD)(2) complexes. It has been found that DETAB and DOTAB form only the 1:1 complexes, while TTAB forms 1:1 1:2 TTAB/CD complexes. The results are explained in terms of the difference in chain length of surfactants and dimensions of the beta-CD cavity. The experiments were carried out at different temperatures. The association constant values are used for evaluation of thermodynamic parameters of complexation, such as DeltaGdegrees, DeltaHdegrees and DeltaSdegrees. (C) 2004 Elsevier B.V. All rights reserved.
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页码：37 / 41
页数：5
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