Exploiting Ultra Tight-Binding Ligands for Separations Technologies
The classic slowness that has kept the most powerful ligands from being used in separations applications is under attack in two ways: (1) replacing metal ion - ligand equilibration with switch binding and release as the mode of complexation. By exploiting the tight-binding capabilities of cryptands, the capture of selected metal ions isolates them from their environment. These cryptands are constructed with photoactivatable functions that sever the cryptand, releasing encapsulated metal ions. The precursors have been modified to capture the metal ion concomitant with crytate formation. (2) developing a methodology (the soil poultice) so slow that powerful ligands can be used. A solution containing the specially designed ligand is mixed with a solid macroporous imprinted polymer (MIPs) and applied to the contaminated area. The ligand captures the metal ion and the MIPs captures the resulting complex. Current studies focus on combinations of MIPs-complex interactions to optimize strength of binding and selectivity.
- Research Organization:
- University of Kansas, Lawrence, KS (US)
- Sponsoring Organization:
- USDOE Office of Science (SC) (US)
- OSTI ID:
- 826220
- Resource Relation:
- Conference: 226th American Chemical Society Meeting, New York, NY (US), 09/07/2003--09/11/2003; Other Information: PBD: 10 Sep 2003
- Country of Publication:
- United States
- Language:
- English
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