Experimental evidences for some unusual divalent cation complexes of valinomycin |
| |
Authors: | Emanuel Makrlík Petr Vaňura and Pavel Selucky |
| |
Institution: | (1) Faculty of Applied Sciences, University of West Bohemia, Plzeň, Czech Republic;(2) Institute of Chemical Technology, Prague, Czech Republic;(3) Nuclear Research Institute, Řež, Czech Republic |
| |
Abstract: | From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M
2+ (aq) + 1 · Sr2+ (nb) ⇄ 1 · M
2+ (nb) + Sr2+ (aq) taking place in the two-phase water-nitrobenzene system (M
2+ = Cu2+, Zn2+, Cd2+, Pb2+, UO2
2+, Fe2+, Co2+, and Ni2+; 1 = valinomycin; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Moreover, the stability constants of the 1 · M
2+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the order Fe2+ < Cd2+, Co2+ < Ni2+ < UO2
2+, Zn2+ < Cu2+ < Pb2+. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|