title: Transition metal cations extraction by ester and ketone derivatives of chromogenic azocalix[4]arenes.
abstract: The molecule of azocalix[n]arene is a macrocyclic used effectively in the complexation of the heavy metal pollutants (like silver and mercury). In this work, our main aim is to prepare new chromogenic azocalix[n]arene molecules to elaborate an extractant with high extractant selectivity for metal ions able to detect this type of pollutant. The solvent extraction properties of four acetyls, four methyl ketones and four benzoyls derivatives from azocalix[4]arenes which were prepared by linking 4-ethyl, 4-n-butyl, 4-acetamid anilin and 2-aminothiazol to calix[4]arene through a diazo-coupling reaction, the alkaline earth (Sr2+) and the transition (Ag+, Hg2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Cr3+) metal cations have been determined by extraction studies with metal picrates. Both ketones are better extractants than esters, and show a strong preference for Ag+, while Cu2+ and Cr3+ are the most extracted cation with the esters. Both acetyl and benzoyl esters are good carriers for Ag+ and Hg2+.
authors.affiliation: Department of Chemistry, Faculty of Science-Arts, Pamukkale University, 20017 Denizli, Turkey.
authors.forename: Metin
authors.initials: M
authors.lastname: Ak
authors.forename: Deniz
authors.initials: D
authors.lastname: Taban
authors.forename: Hasalettin
authors.initials: H
authors.lastname: Deligöz
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D047250:Calixarenes / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D010851:Picrates / Q000737:chemistry
chemical_list: D001391:Azo Compounds; D004785:Environmental Pollutants; D004952:Esters; D007659:Ketones; D008024:Ligands; D008670:Metals; D010636:Phenols; D010851:Picrates; C121325:calix(4)arene; D047250:Calixarenes