title: Selective and efficient tripodal receptors for competitive solvent extraction and bulk liquid membrane transport of Hg2+.
abstract: A series of tripodal receptors that are different from each other in their end groups were synthesized. The extraction ability and the transport rate of these receptors were evaluated for transition metal ions (Fe(3+), Ni(2+), Cu(2+), Zn(2+) and Hg(2+)). The receptor bearing pyridyl nitrogens extracted Hg(2+) from a buffered aqueous medium containing a mixture of metal ions and transported it into an organic phase with a complete selectivity over the other metal ions. This receptor was effectively used for transporting Hg(2+) from aqueous buffered source phase to aqueous receiving phase through a chloroform membrane.
authors.affiliation: Department of Chemistry, Yonsei University, Wonju 220-710, Republic of Korea.
authors.forename: Narinder
authors.initials: N
authors.lastname: Singh
authors.forename: Doo Ok
authors.initials: DO
authors.lastname: Jang
mesh_terms: D017136:Ion Transport; D009682:Magnetic Resonance Spectroscopy; D008628:Mercury / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D012997:Solvents; D014874:Water Pollutants, Chemical; D008628:Mercury