Extraction distribution of sodium picrate in the water-nitrobenzene system in the presence of p-tert-butylcalix[4]arene-tetrakis(N,N-diethylacetamide)

被引：12
|
作者：
Makrlik, E.
Vanura, P.
机构：
[1] Univ W Bohemia, Fac Sci Appl, Plzen 30614, Czech Republic
[2] Prague Inst Chem Technol, CR-16628 Prague 6, Czech Republic
来源：
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS | 2006年 / 220卷 / 12期
关键词：
sodium picrate; calix[4]arene compound; extraction; water-nitrobenzene system; stability constant;
D O I：
10.1524/zpch.2006.220.12.1569
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：
From extraction experiments With Na-22 as a tracer, the extraction constant corresponding to the equilibrium Na+(aq) + A-(aq) + L(nb) double left right arrow NaL+(nb) + A(-)(nb) taking place in the two-phase water-nitrobenzene system [A(-) = picrate, L = p-tert-butylcalix[4]arene-tetrakis(N,N-diethylacetamide); aq aqueous phase, nb = nitrobenzene phase] was evaluated as log K-ex(NaL+, A(-)) 4.6 +/- 0.1. Further, the stability constant of the p-tert-butylcalix[4]arene-tetrakis(N,N-diethylacetamide)-sodium complex in nitrobenzene saturated with water was calculated for a temperature of 25 degrees C: log beta(nb)(NaL+) = 9.8 +/- 0.1.
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页码：1569 / 1573
页数：5
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