Abstract
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+ (aq) + 1·Cs+ (nb) ⇔ 1·M+ (nb) + Cs+ (aq) taking place in the two-phase water–nitrobenzene system (M+ = Ag+, K+, Rb+, Tl+; 1 = 1,3-alternate-25,27-bis(1-octyloxy)calix[4]arene-crown-6; aq is aqueous phase, nb is nitrobenzene phase) were determined. Moreover, the stability constants of the 1·M+ complexes in water-saturated nitrobenzene were calculated; they were found to increase in the series of K+ < Rb+ < Ag+ < Tl+.
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Acknowledgments
This study 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).
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Makrlík, E., Selucký, P. & Vaňura, P. On the complexation of some univalent cations with 1,3-alternate-25,27-bis(1-octyloxy)calix[4]arene-crown-6 in nitrobenzene saturated with water. J Incl Phenom Macrocycl Chem 76, 13–17 (2013). https://doi.org/10.1007/s10847-012-0167-z
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DOI: https://doi.org/10.1007/s10847-012-0167-z