Stability of the valinomycin-rubidium complex in water saturated nitrobenzene |
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| Authors: | M Daňková E Makrlík P Vaňura |
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| Institution: | (1) Kremli kova 964, 280 00 Kolín II, Czech Republik;(2) Faculty of Education, Charles University, 116 39 Prague 1, Czech Republik;(3) Prague Institute of Chemical Technology, 166 28 Prague, Czech Republik;(4) 341 42 Kolinec 250, Czech Republic |
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| Abstract: | From the extraction experiments and  -activity measurements, the extraction constant corresponding to the Rb+(aq)+CsL+(nb) RbL+(nb)+Cs+(aq) equilibrium in the two-phase water-nitrobenzene system (L=valinomycin; aq=aqueous phase, nb=nitrobenzene phase) was evaluated in the form logK
ex (Rb+, CsL+)=0.9. Further, the stability constant of the valinomycin-rubidium complex in nitrobenzene saturated with water was calculated as log  nb(RbL+)=11.7. |
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