Effect of sidearm length upon competitive alkali metal solvent extraction into chloroform by lipophilic crown phosphonic acid monoalkyl esters
A homologous series of sym-bis(4(5)-tert-butylbenzo)-16-crown-5-oxyalkylphosphonic acid monoethyl esters has been synthesized and utilized in competitive solvent extraction of alkali metal cations from water into chloroform. The change from Na/sup +/ extraction selectivity for the ionizable crown ethers with short sidearms to Li/sup +/ extraction selectivity for longer armed macrocycles is interpreted as a shift from predominant cation complexation within the polyether cavity for the former to predominant association with the carboxylate group for the latter. Compared with a closely related crown ether carboxylic acid, the extraction of alkali metal cations from acidic aqueous solutions by the crown ether phosphonic acid monoethyl esters exhibits much higher efficiency.
- Research Organization:
- Texas Tech Univ., Lubbock
- DOE Contract Number:
- AS05-80ER10604
- OSTI ID:
- 5109508
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:13; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Metal ion complexation by ionic crown ethers. Progress report
Metal ion complexation by ionizable crown ethers. Progress report, January 1, 1991--December 31, 1993
Related Subjects
400105* -- Separation Procedures
ALKALI METAL COMPOUNDS
CATIONS
CESIUM COMPOUNDS
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
DATA
ESTERS
EXPERIMENTAL DATA
EXTRACTION
HALOGENATED ALIPHATIC HYDROCARBONS
INFORMATION
IONS
LITHIUM COMPOUNDS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
POTASSIUM COMPOUNDS
QUALITATIVE CHEMICAL ANALYSIS
RUBIDIUM COMPOUNDS
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLVENT EXTRACTION
SYNTHESIS