Solvent extraction of H3O+, NH4+, Ag+, K+, Rb+ and Tl+ into nitrobenzene by using cesium dicarbollylcobaltate in the presence of a hexaarylbenzene-based receptor |
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| Authors: | E. Makrlík P. Selucky P. Vaňura P. Toman R. Rathore |
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| Affiliation: | (1) Faculty of Applied Sciences, University of West Bohemia, Husova 11, 306 14 Pilsen, Czech Republic;(2) Nuclear Research Institute, 250 68 Řež, Czech Republic;(3) Department of Analytical Chemistry, Institute of Chemical Technology, Prague, Technick? 5, 166 28 Prague 6, Czech Republic;(4) Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsk?ho sq. 2, 162 06 Prague 6, Czech Republic;(5) Department of Chemistry, Marquette University, P.O.Box 1881, Milwaukee, WI 53 201-1881, USA |
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| Abstract: | From extraction experiments and γ-activity measurements, the extraction constants corresponding to the general equilibrium M+(aq) + 1·Cs+(nb) rightleftarrows rightleftarrows 1·M+(nb) + Cs+(aq) taking part in the two-phase water–nitrobenzene system (1 = hexaarylbenzene-based receptor; M+ = H3O+, NH4 +, Ag+, K+, Rb+, Tl+; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the ML+ complex species in nitrobenzene saturated with water were calculated; they were found to increase in the series of Rb+ < K+ < Ag+, Tl+ < H3O+, NH4 +. |
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