Evidence for the formation of UO2(NO3)42− in an ionic liquid by EXAFS
Résumé
The complexation between uranium(VI) and nitrate ions in a hydrophobic ionic liquid (IL), namely [BMI][NO3] (BMI = 1-butyl-3-methylimidazolium+), is investigated by EXAFS spectroscopy. It was performed by dissolution of uranyl nitrate UO2(NO3)2·6H2O or UO2(Tf2N)2 (Tf2N = bis(trifluoromethylsulfonyl)imide (CF3SO2)2N−). The formation of the complex UO2(NO3)42− is evidenced.
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