title: Synthesis and metal ion binding properties of thiaaza crown macrocycles.
abstract: Two new macrocyclic ligands (3) and (4), containing nitrogen-sulfur donor atoms, were designed and synthesized in a multi-step reaction sequence. The macrocycles (3) and (4) were used in solvent extraction of metal picrates such as Ag(+), Hg(2+), Cd(2+), Zn(2+), Cu(2+), Ni(2+), Mn(2+), Co(2+), and Pb(2+) from aqueous phase to the organic phase. The metal picrate extractions were investigated at 25+/-0.1 degrees C by using UV-visible spectrometry. The extractability and selectivity of the mentioned metal picrates were evaluated according to the organic solvents. The values of the extraction constants (logK(ex)) and the complex compositions were determined for the extracted complexes.
authors.affiliation: Department of Chemistry, Faculty of Arts & Sciences, Giresun University, 28049 Giresun, Turkey.
authors.forename: Hakan
authors.initials: H
authors.lastname: Alp
authors.forename: Halil Zeki
authors.initials: HZ
authors.lastname: Gök
authors.forename: Halit
authors.initials: H
authors.lastname: Kantekin
authors.forename: Ummühan
authors.initials: U
authors.lastname: Ocak
mesh_terms: D001372:Aza Compounds / Q000737:chemistry*; D047248:Crown Compounds / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008670:Metals / Q000737:chemistry*; D012997:Solvents; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D001372:Aza Compounds; D047248:Crown Compounds; D008024:Ligands; D008670:Metals; D012997:Solvents