Abstract
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+ (aq) + CsL+ (nb) ⇔ ML+ (nb) + Cs+ (aq) taking place in the two–phase water–nitrobenzene system (M+ = K+, Rb+, \( {\text{NH}}_{4}^{ + } \), Ag+, Tl+; L = calix[4]arene-bis(t-octylbenzo-18-crown-6); aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the ML+ complexes in nitrobenzene saturated with water were calculated; they were found to increase in the following cation order: \( {\text{NH}}_{4}^{ + } \) < K+ < Ag+ < Rb+ < Tl+.
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Acknowledgments
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” and by the Czech Ministry of Education, Youth, and Sports (Project MSM 6046137307). The participation of BAM was sponsored by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basis Energy Sciences, US Department of Energy.
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Makrlík, E., Selucký, P., Vaňura, P. et al. Synergistic extraction of some univalent cations into nitrobenzene by using cesium dicarbollylcobaltate and calix[4]arene-bis(t-octylbenzo-18-crown-6). J Radioanal Nucl Chem 295, 1015–1018 (2013). https://doi.org/10.1007/s10967-012-1897-5
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DOI: https://doi.org/10.1007/s10967-012-1897-5