Candidate: Jun Yang

Degree of: Doctor of Philosophy

Department: Chemistry

Title: Acylpyrazolones: SynTheses, Self-assembly and Lanthanide Metal Ions Recognition

Committee:Dr. Subra Muralidharan, Chair
Dr. Elke Schoffers
Dr. Marc Perkovic
Dr. Yirong Mo
Dr. Brian Tripp

Date: Wednesday, May 11, 2005 1:00 p.m. – 5:00 p.m.
2722 Wood Hall

Abstract: A family of amphiphilic acylpryazolone ligands was synthesized and investigated in this study. These ligands spontaneously form nanoscale self-assemblies in aqueous phase, which highly influence the selectivity and separation efficiency for lanthanide metal ions. The mechanism of lanthanide metal ion recognition will also be discussed. Some of the investigated ligands are very efficient for the lanthanide metal ions separation, which is valuable for sensing and remediation of nuclear waste. The acylprazolones and acylisoxazolones were attached to the surface of silica nano-particles, which also self-assemble in aqueous phase and could be used as metal ion sensors. We have for the first time synthesized acylpyrazolones tethered to amphiphilic moieties and nano-particles and demonstrated their lanthanide metal ion recognition efficacies.

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