Solvent extraction of univalent cations into nitrobenzene using sodium dicarbollylcobaltate and tetraphenyl p-tert-butylcalix[4]arene tetraketone |
| |
Authors: | Emanuel Makrlík Jan Budka Petr Vaňura Jiří Dybal |
| |
Institution: | (1) Faculty of Applied Sciences, University of West Bohemia, Pilsen, Czech Republic;(2) Institute of Chemical Technology, Prague, Czech Republic;(3) Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic |
| |
Abstract: | From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the equilibrium
M
+(aq) + 1 · Na+ (nb) ⇄ 1 · M
+ (nb) + Na+ (aq) taking place in the two-phase water-nitrobenzene system (M
+ = Li+, H3O+, NH4
+, Ag+, K+, Rb+, Tl+, Cs+; 1 = tetraphenyl p-tert-butylcalix4]arene tetraketone; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Moreover, the stability constants
of the 1 · M
+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the order Cs+ < Rb+ < Tl+ < K+ < NH4
+ < Ag+ < H3O+ < Li+.
Correspondence: Emanuel Makrlík, Faculty of Applied Sciences, University of West Bohemia, Pilsen, Czech Republic. |
| |
Keywords: | Calixarenes Macrocycles Complexation Univalent cations Stability constants |
本文献已被 SpringerLink 等数据库收录! |
|