TITLE

Spectrophotometric study of uranium(VI) complex equilibria with N,N-dimethylformamide

AUTHOR(S)
Havel, J.; Kanick√Ĺ, V.; Lubal, P.
PUB. DATE
August 2003
SOURCE
Journal of Radioanalytical & Nuclear Chemistry;Aug2003, Vol. 257 Issue 2, p391
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Spectrophotometric study of solvation equilibria of uranium(VI) with N,N-dimethyl formamide (DMF) in solutions with ionic strength I = 3.0 mol.dm-3 (Na, H)ClO4 shows that DMF forms with UO22+ several relatively stable solvates absorbing in VIS range (350-490 nm). The absorbance of UO22+ bands increases and their absorption maxima shift to longer wavelengths while uranyl solvates are formed stepwise with increasing concentration of DMF. Areas of prevailing existence of individual solvates with stoichiometry 1 :n(n= 1, 2, 4, 6) have been found and their stability constants and molar absorption coefficients estimated using both graphical methods and computer minimization programs.
ACCESSION #
16782096

 

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