Novel macrocyclic carriers for proton-coupled liquid membrane transport. Progress report, 1 December 1988--31 May 1991
The objective of our research program is to elucidate the chemical principles which are responsible for the cation selectivity and permeability of liquid membranes containing macrocyclic carriers. Several new macrocyclic carriers were synthesized during the last three year period, including selenium-containing macrocycles, new crown-4 structures, and several new crown structures containing nitrogen based heterocycles as substituents in the principal macrocyclic ring. The cation binding properties of these macrocycles were investigated by potentiometric titration, calorimetric titration, solvent extraction, and NMR techniques. In addition, hydrophobic macrocycles were incorporated into dual hollow fiber membrane systems to investigate their membrane performance, especially in the proton-coupled transport mode. It was found that the dual hollow fiber system maintains the cation selectivity and permeability of supported liquid membranes, while enhancing membrane stability. The diffusion limited transport model was expanded to account for membrane solvent effects. Furthermore, Eu{sup 2+} transport was found to be similar to that of strontium and much higher than that of the lanthanides, in supported liquid membrane systems.
- Research Organization:
- Brigham Young Univ., Provo, UT (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-86ER13463
- OSTI ID:
- 10108313
- Report Number(s):
- DOE/ER/13463-8; ON: DE92004045
- Resource Relation:
- Other Information: PBD: 10 Jun 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
EUROPIUM IONS
MEMBRANE TRANSPORT
PROGRESS REPORT
SUPPORTED LIQUID MEMBRANES
SEPARATION PROCESSES
POTENTIOMETRY
CALORIMETRY
SOLVENT EXTRACTION
NUCLEAR MAGNETIC RESONANCE
SELENIUM COMPOUNDS
LIGANDS
POLYETHYLENE GLYCOLS
400105
SEPARATION PROCEDURES