Solution Effects on Cesium Complexation with Calixarene - Crown Ethers from Liquid to Supercritical Fluids
Supercritical fluid CO2 is an alternative solvent for extraction of metals. The solubility parameter of supercritical CO2 varies with density resembling that of liquid hexane at moderate pressures in the supercritical region to those of chlorinated solvents at very high pressures. By changing density of supercritical CO2, the solvation environment of a metal chelate system can vary continuously and resembles over a wide range of solvents. Thus, supercritical CO2 provides a unique system for studying solvation effects on metal chelation. This project is designed to investigate the solvation effects on cesium complexation with macrocyclic compounds including crown ethers and calixarene-crown ethers in CO2 from liquid to supercritical region at high pressures. A powerful spectroscopic technique for studying cesium chelation is nuclear magnetic resonance (NMR). Cesium has only one isotope, 133Cs, with a nuclear spin I = 7/2. Popov et al. used NMR to study cesium complexation with crown ethers and cryptand.
- Research Organization:
- University of Idaho, Idaho Falls, Idaho; Pacific Northwest National Lab., Richland, WA (US)
- Sponsoring Organization:
- USDOE Office of Environmental Management (EM) (US)
- DOE Contract Number:
- FG07-98ER14913
- OSTI ID:
- 833192
- Report Number(s):
- EMSP-65351--1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
Solvent Effects on Metal Complexation with Crown Ethers from Liquid to Supercritical Fluids (DE-FG07-98ER 149 13)
Kinetics of complexation of the cesium ion with large crown ethers in acetone and in methanol solutions. [Dibenzo-21-crown-7 and dibenzo-24-crown-8]
Surveying the extraction of cesium nitrate by 1,3-alternate calix[4]arene crown-6 ethers in 1,2-dichloroethane
Technical Report
·
Sat Jun 01 00:00:00 EDT 2002
·
OSTI ID:833234
Kinetics of complexation of the cesium ion with large crown ethers in acetone and in methanol solutions. [Dibenzo-21-crown-7 and dibenzo-24-crown-8]
Journal Article
·
Thu Oct 24 00:00:00 EDT 1985
· J. Phys. Chem.; (United States)
·
OSTI ID:6052482
Surveying the extraction of cesium nitrate by 1,3-alternate calix[4]arene crown-6 ethers in 1,2-dichloroethane
Journal Article
·
Sun Oct 31 23:00:00 EST 1999
· Solvent Extraction and Ion Exchange
·
OSTI ID:20019002