Discussion on the complexing ability of the uranyl ion with several crown ethers and cryptands in water and in propylene carbonate
Interactions of the uranyl ion (UO/sub 2//sup 2 +/) with some common crown ethers (12C4, 15C5, 18C6, DB-18C6) and cryptands (22,222) are investigated in aqueous and propylene carbonate (PC) solutions, I = 0.1 M ((TEA)ClO/sub 4/). Stability constants of the complexes formed are determined by potentiometric and spectrophotometric measurements. Discussions on the stability constants of the complexes allow us to postulate whether or not direct uranyl-macrocycle bonds are obtained. In PC solution, uranyl inner-sphere complexes with 18C6, DB-18C6, 22, and 222 are formed with the uranyl ion probably inside or partially enclosed in the ligand cavity. In aqueous media, complexation occurs only with crown ethers by formation of hydrogen bonds between hydrogen of water molecules of the hydrate shell of the uranyl ion and oxygen atoms of the crown ether (UO/sub 2//sup 2 +/ outer-sphere complexes). 31 references, 5 figures, 3 tables.
- Research Organization:
- Ecole Nationale Superieure de Chimie de Strasbourg, France
- OSTI ID:
- 5715634
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 24:1; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ABSORPTION SPECTROSCOPY
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
ACTINIDES
ALCOHOLS
ALKALI METALS
AQUEOUS SOLUTIONS
CARBONIC ACID ESTERS
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
COMPARATIVE EVALUATIONS
COMPLEXES
COMPLEXOMETRY
DATA
DISPERSIONS
ELEMENTS
ESTERS
EXPERIMENTAL DATA
GLYCOLS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
LEAD
METALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYETHYLENE GLYCOLS
POLYMERS
POTENTIOMETRY
SODIUM
SOLUTIONS
SPECTROSCOPY
STABILITY
STOICHIOMETRY
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TITRATION
URANIUM
URANIUM COMPLEXES
URANIUM COMPOUNDS
URANYL COMPLEXES
URANYL COMPOUNDS
WATER
YIELDS