Synergistic extraction of some divalent metal cations into nitrobenzene by using strontium dicarbollylcobaltate and electroneutral macrocyclic lactam receptor

0389452 - ÚMCH 2013 RIV HU eng J - Journal Article
Makrlík, E. - Sedláková, Zdeňka - Vaňura, P. - Selucký, P.
Synergistic extraction of some divalent metal cations into nitrobenzene by using strontium dicarbollylcobaltate and electroneutral macrocyclic lactam receptor.
Journal of Radioanalytical and Nuclear Chemistry. Roč. 295, č. 3 (2013), s. 2263-2266. ISSN 0236-5731. E-ISSN 1588-2780
Institutional support: RVO:61389013
Keywords : divalent metal cations * macrocyclic lactam receptor * complexation
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 1.415, year: 2013

From extraction experiments and γ -activity measurements, the exchange extraction constants corresponding to the general equilibrium M2+(aq) + 1.Sr2+(nb) reversible arrow 1.M2+(nb) + Sr2+(aq) taking place in the two-phase water–nitrobenzene system (M2+ = Mg2+, Ca2+, Ba2+, Pb2+, Cu2+, Zn2+, Cd2+, UO 2+ 2, Mn2+, Co2+, Ni2+; 1 = macrocyclic lactam receptor; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Moreover, the stability constants of the 1.M2+ complexes in nitrobenzene saturated with water were calculated; they were found to increase in the following cation order: Mg2+ < Co2+ < Cu2+, Mn2+, Ni2+ < Cd2+ < Ca2+ < Ba2+, Zn2+ < Pb2+ < UO 2+ 2.
Permanent Link: http://hdl.handle.net/11104/0218736