Solvent extraction of some organic cations into nitrobenzene by using cesium dicarbollylcobaltate in the presence of a hexaarylbenzene-based receptor
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From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium C +(aq) + 1·Cs+(nb) \( \rightleftarrows \) 1·C+(nb) + Cs+(aq) taking place in the two-phase water–nitrobenzene system (C+ = organic cation, 1 = hexaarylbenzene-based receptor; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the 1·C+ cationic complex species in nitrobenzene saturated with water were calculated.
KeywordsOrganic cations Hexaarylbenzene-based receptor Cesium dicarbollylcobaltate Solvent extraction Nitrobenzene
This work was supported by the Grant Agency of Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Project No.: 42900/1312/3114 “Environmental Aspects of Sustainable Development of Society,” by the Czech Ministry of Education, Youth and Sports, Project MSM 6046137307, and by the Czech Science Foundation, Project P 205/10/2280. Finally, R. R. thanks the National Science Foundation for financial support.