title: Comparative studies on the solvent extraction of transition metal cations by calixarene, phenol and ester derivatives.
abstract: The ionophore solvent extraction of various alkali metal and transition metal cations from the aqueous phase to the organic phase was carried out by using diazo-coupling calix[n]arenes [p-(4-phenylazophenylazo)calix[4]arene (L1) and p-phenylazocalix[6]arene (L2)], phenol derivatives [2,6-dimethyl-3-phenylazophenol (L3), 2-(5-bromo-2-pyridylazo)-5-diethylamino phenol (L4), 2-chloro-4-nitro(phenylazo)-5-sec-butyl-2-phenol (L5) and 2-chloro-4-nitro(phenylazo)-5-tert-butyl-2-phenol (L6)], and ester derivatives [quinoline-8-benzoate (L7), phenyl-1,4-dibenzoate (L8), p-tolyltiobenzoate (L9)]. It was found that, all the compounds (L1-L9) examined showed selectivity for transition metal cations such as Ag+, Hg+ Hg2+, and poor efficiency for alkali metal cations (Na+ and K+). The best extraction efficiency was obtained with L1 and L4.
authors.affiliation: Pamukkale University, Faculty of Science-Arts, Department of Chemistry, 20017 Denizli, Turkey. hdeligoz@pamukkale.edu.tr
authors.forename: Hasalettin
authors.initials: H
authors.lastname: Deligöz
authors.forename: Emin
authors.initials: E
authors.lastname: Erdem
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D010851:Picrates / Q000737:chemistry; D012997:Solvents / Q000737:chemistry
chemical_list: D004952:Esters; D008024:Ligands; D008670:Metals; D010636:Phenols; D010851:Picrates; D012997:Solvents; D047250:Calixarenes