Rational Ligand Design for Selective Ion Capture
Format
Oral Presentation
Faculty Mentor Name
Qinliang Zhao
Faculty Mentor Department
Chemistry
Abstract/Artist Statement
Two new derivatives of 1, 4, 8, 11- tetraazacyclotetradecane (Cyclam), a saturated macrocylic polyamine, were successfully synthesized through substitution reactions with the assistance of strong bases. The ligands have been characterized by X-ray Crystallography, NMR Spectroscopy and Mass Spectrometry. Direct metallation reactions of both ligands with a variety of metal salts indicated that the pocket in each ligand center was not accessible to most transition metal ions, which was further demonstrated by structural analysis. The Cyclam with four phosphoryl pendant arms, however, was able to hold two lanthanide ions through stabilization from the oxygen atoms on the phosphoryl substituents. The resulting complex exhibited a unique butterfly-shaped geometry.
Location
DeRosa University Center, Room 211
Start Date
26-4-2014 9:00 AM
End Date
26-4-2014 12:00 PM
Rational Ligand Design for Selective Ion Capture
DeRosa University Center, Room 211
Two new derivatives of 1, 4, 8, 11- tetraazacyclotetradecane (Cyclam), a saturated macrocylic polyamine, were successfully synthesized through substitution reactions with the assistance of strong bases. The ligands have been characterized by X-ray Crystallography, NMR Spectroscopy and Mass Spectrometry. Direct metallation reactions of both ligands with a variety of metal salts indicated that the pocket in each ligand center was not accessible to most transition metal ions, which was further demonstrated by structural analysis. The Cyclam with four phosphoryl pendant arms, however, was able to hold two lanthanide ions through stabilization from the oxygen atoms on the phosphoryl substituents. The resulting complex exhibited a unique butterfly-shaped geometry.