Abstract
Two N4-type Schiff base ligands named N,N'-bis(2-pyridylmethylidene)-1,2- diiminoethane (L 1 ) and N,N'-bis(2-pyridylmethylidene)-1,3-diiminopropane (L 2 ) have been synthesized by the reaction of pyridine-2-carbaldehyde with ethylenediamine and propylenediamine, respectively. The binding abilities of L 1 and L 2 in dichloromethane towards Cu 2+ , Cd 2+ , Co 2+ , Ni 2+ , Zn 2+ and Pb 2+ ions were evaluated by performing competitive extraction experiments on the mixtures containing theses ions from aqueous picrate and nitrate media as a function of the aqueous phase pH. The results show a pronounced selectivity of the ligands towards copper and cadmium ions among the tested metal ions. It is shown that the copper/cadmium selectivity of the ligands is profoundly influenced by the nature of anions accompanying the extracted complexes. In fact, the ligands are more efficient complexing agent for cadmium ions in the presence of nitrate and acetate anions, whereas this selectivity changes towards copper ions in the presence of picrate, perchlorate and thiocyanat ions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Iranian Journal of Chemistry & Chemical Engineering-international English Edition
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.