Uranyl Complexation in Fluorinated Acids (HF, HBF4, HPF6, HTf2N): ACombined Experimental and Theoretical Study


Uranyl Complexation in Fluorinated Acids (HF, HBF4, HPF6, HTf2N): ACombined Experimental and Theoretical Study

Gaillard, C.; El Azzi, A.; Billard, I.; Bolvin, H.; Hennig, C.

The aim of this work is to characterize the complexation ability of F-, BF4 -, PF6 -, and Tf2N- toward uranyl ions in aqueous solution. These anions were chosen as they represent the anionic part of the most studied roomtemperature ionic liquids. Time-resolved emission spectroscopy and X-ray absorption spectroscopy were used to retrieve structural data on the complexes formed. The results obtained were compared with computational data.
Tf2N- does not complex uranyl, even at high concentration. Other fluorinated acids form inner-sphere complexes with U(VI), in a monodentate fashion in the case of BF4 and PF6.

  • Inorganic Chemistry 44(2005), 852-861

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Publ.-Id: 7155