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

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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 UO2 2+ several relatively stable solvates absorbing in VIS range (350-490 nm). The absorbance of UO2 2+ 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.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, CZ-611 37, Brno, Czech Republic

    J. Havel, V. Kanický & P. Lubal

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  1. J. Havel
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  2. V. Kanický
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  3. P. Lubal
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Havel, J., Kanický, V. & Lubal, P. Spectrophotometric study of uranium(VI) complex equilibria with N,N-dimethylformamide. Journal of Radioanalytical and Nuclear Chemistry 257, 391–398 (2003). https://doi.org/10.1023/A:1024704417736

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