Metal ion complexation by ionizable crown ethers: Progress report, January 1, 1985-December 31, 1987
A variety of lipophilic crown ethers with pendant ionizable groups has been prepared. Several lipophilic acyclic polyethers bearing either one or two ionizable groups have also been synthesized. Complexation of alkali metal and alkaline earth cations by such novel ligands has been probed using NMR and solvent extraction. Effects of ring size, side arm length, ionizable group identity and other structural variations, as well as the effect of the solvent, the competitive alkali metal cation solvent extraction has been assessed. Investigations of heavy metal and transition metal cation complexation by ionizable crown ethers have been conducted. The influence of structural variations within acyclic polyether carboxylic acids and dicarboxylic acids on the alkali metal and alkaline earth cation solvent extraction has also been probed. New ligands have been developed which exhibit high selectivities for Cs/sup +/ and Ra/sup 2 +/ in solvent extraction processes. The ability of ionizable crown ethers to function as selective metal cation carriers in liquid membrane transport processes has been examined in both bulk liquid membrane and polymer-supported liquid membrane transport systems.
- Research Organization:
- Texas Tech Univ., Lubbock (USA)
- DOE Contract Number:
- AS05-80ER10604
- OSTI ID:
- 6478518
- Report Number(s):
- DOE/ER/10604-7; ON: DE87011979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105* -- Separation Procedures
ALCOHOLS
ALKALI METAL COMPLEXES
ALKALI METALS
ALKALINE EARTH METAL COMPLEXES
ALKALINE EARTH METALS
COMPLEXES
ELEMENTS
EXTRACTION
GLYCOLS
HYDROXY COMPOUNDS
LIGANDS
MAGNETIC RESONANCE
MEMBRANES
METALS
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYETHYLENE GLYCOLS
POLYMERS
RESEARCH PROGRAMS
RESONANCE
SEPARATION PROCESSES
SOLVENT EXTRACTION
SYNTHESIS
TRANSITION ELEMENTS
USES