Contribution to the thermodynamics of complexes of alkali metal cations with hexaethyl p-tert-butylcalix[6]arene hexaacetate in the water-nitrobenzene extraction system

被引：14
作者：
Makrlik, E. [1 ]
Vanura, P. [2 ]
Budka, J. [2 ]
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：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2008年 / 275卷 / 02期
关键词：
D O I：
10.1007/s10967-007-7065-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
From extraction experiments and gamma-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq)+CsL+(nb)double left right arrow ML+(nb)+Cs+(aq) taking place in the two-phase water-nitrobenzene system (M+ = Li+, Na+, K+, Rb+; L = hexaethyl p-tert-butylcalix[6]arene hexaacetate; aq = aqueous phase, nb = nitrobenzene phase) were determined. Moreover, the stability constants of the ML+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the cation order Rb+<Cs+<K+<Na+<Li+.
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页码：463 / 466
页数：4
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