Synergism as a phenomenon in solvent extraction of 4f-elements with calixarenes

摘要: The main objective of the present review is to provide an overview on synergistic solvent extraction lanthanoids, in particularly use β-diketone/calixarene i.e. acidic/neutral mixture, as well analysis data hitherto reported this scientific topic. Based previously presented results, efficiency has been careful examined and discussed mainly terms corresponding equilibrium constants among other outlined parameters. Furthermore, evaluation chelating ligand structures pKa values are emphasized. Major conclusions role calixarene's ligating groups towards mechanism, improved enhancement selectivity additionally provided. Consequently, it very important that obtained remarkable architecture formed complexes with high coordination numbers (10/12) including a few cyclic molecules accordance well-established principles 4f-ion chemistry. Finally, critical lanthanoid intra-group (light/middle, heavy/middle light/heavy pairs) versus performance combinations and, hand, nature water-immiscible molecular or ionic diluent used have also carried out here critically addressed.