Cationic ester-containing gemini surfactants: Determination of aggregation numbers by time-resolved fluorescence quenching

被引：61
|
作者：
Tehrani-Bagha, A. R. [1 ,2 ]
Karnbratt, J. [1 ]
Lofroth, J. -E. [1 ]
Holmberg, K. [1 ]
机构：
[1] Chalmers Univ Technol, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden
[2] Inst Color Sci & Technol, Tehran, Iran
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2012年 / 376卷
关键词：
Gemini surfactant; Esterquat; Fluorescence quenching; Aggregation number; ANGLE NEUTRON-SCATTERING; SPACER CHAIN-LENGTH; ALKANEDIYL-ALPHA; OMEGA-BIS(DIMETHYLALKYLAMMONIUM BROMIDE) SURFACTANTS; CRITICAL MICELLIZATION CONCENTRATION; HYDROXYL SUBSTITUTED SPACERS; ACID METHYL-ESTER; AQUEOUS-SOLUTION; PREMICELLAR AGGREGATION; COUNTERION BINDING; LUMINESCENT PROBES;
D O I：
10.1016/j.jcis.2012.02.053
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 micellar aggregation number of a series of ester-containing gemini surfactants has been determined with steady state and with time-resolved fluorescence quenching. The latter method gave values of aggregation number about twice those obtained with the former method. It was found that the length of the spacer was the most important factor affecting the aggregation number. The length and the nature of the surfactant alkyl chains were of less importance in spite of the fact that the length of the alkyl chains strongly affects the solution properties of the unimers. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码：126 / 132
页数：7
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