Polarographic electroreduction of some complexes of uranium with macrocyclic polyethers

Journal Article · Thu Oct 31 23:00:00 EST 1985 · Anal. Lett.; (United States)

DOI:https://doi.org/10.1080/00032718508068620· OSTI ID:6205667

Luca, C; Khalil, M M; Tanase, I

The polarographic behavior of uranium(VI) in aqueous 0.1 N nitric acid medium, in the presence of some polyoxa macrocyclic ligands (15-crown-5, benzo-15-crown-5, 18-crown-6, dicyclohexyl-18-crown-6), at 25/sup 0/C, was investigated. Both in the absence and in the presence of the polyoxa macrocyclic ligands, the reduction of hexavalent uranium in aqueous medium takes place in two steps, each of which involves the transfer of an electron. Under diffusion-controlled conditions, the two steps of the reduction in acid medium proceed reversibly. The results of the polarographic measurements enabled an estimate to be made of the ratio of the stability constants of the complex ions of U(III) and of U(IV) with macrocyclic polyethers. 20 references, 3 figures, 4 tables.

• Research Organization: Polytechnical Institute of Bucharest, Romania
• OSTI ID: 6205667
• Journal Information: Anal. Lett.; (United States), Journal Name: Anal. Lett.; (United States) Vol. 18:A18; ISSN ANALB
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ACTINIDE COMPLEXES
ALCOHOLS
AQUEOUS SOLUTIONS
CHEMICAL REACTIONS
COMPLEXES
DATA
DIFFUSION
DISPERSIONS
ELECTRON TRANSFER
EXPERIMENTAL DATA
GLYCOLS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
LIGANDS
MIXTURES
NITRIC ACID
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYETHYLENE GLYCOLS
POLYMERS
REDUCTION
SOLUTIONS
STABILITY
URANIUM COMPLEXES
VOLTAMETRY