Solubilizing and catalytic properties of supramolecular systems based on gemini surfactants

被引：10
作者：
Mirgorodskaya, A. B. [1 ]
Yackevich, E. I. [1 ]
Valeeva, F. G. [1 ]
Pankratov, V. A. [2 ]
Zakharova, L. Ya. [1 ]
机构：
[1] Russian Acad Sci, Kazan Sci Ctr, AE Arbuzov Organ & Phys Chem Inst, Kazan 420088, Russia
[2] Moscow Natl Univ Food Prod, Moscow 109316, Russia
来源：
RUSSIAN CHEMICAL BULLETIN | 2014年 / 63卷 / 01期
关键词：
gemini surfactants; aggregation behavior; solubilization; micellar catalytic effect; ALKYLAMMONIUM SURFACTANTS; CATIONIC SURFACTANTS; AGGREGATION; BEHAVIOR; CHAIN; MICELLES; CLEAVAGE; LENGTH; DYE;
D O I：
10.1007/s11172-014-0398-9
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Quantitative parameters characterizing the aggregation behavior of dicationic surfactants of the 12-s-12 type in aqueous solutions were determined: critical micelle concentrations, aggregation numbers, and surface potentials. The effects of the spacer length of the surfactants on their solubilizing effect with respect to hydrophobic (dye Orange OT) and water-soluble (p-nitrophenol) spectral probes and on their ability to shift acid-base equilibria were studied. The kinetics of alkaline hydrolysis of p-nitrophenyl acetate and p-nitrophenyl caprinate in 12-s-12 solutions was studied by spectrophotometry. A correlation between the micellar catalytic effect and the surface potential of micelles was established. The pronounced substrate specificity was revealed: the maximum acceleration of hydrolysis is observed in solutions of 12-6-12, attaining 1760 times for p-nitrophenyl caprinate.
引用
收藏
页码：82 / 87
页数：6
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