Abstract
The complex formation of uranium(VI) with salicylhydroxamic, benzohydroxamic, and benzoic acid was investigated by time-resolved laser-induced fluorescence spectroscopy (TRLFS). We observed in all three systems a decrease in the fluorescence intensity with increasing ligand concentration. All identified complexed uranyl species are of the type MpLqHr. In the uranium(VI)-salicylhydroxamate system a 1: 1 complex with a stability constant of log β 111 = 17.34±0.06 and a 1: 2 complex with a stability constant of log β 122 = 35.0±0.11 was identified. Also in the uranium(VI)-benzohydroxamate system the stability constants are determined to be log β 110 = 7.92±0.11 and log β 120 = 16.88±0.49. In the uranium(VI)-benzoate system only a 1: 1 complex is existent with a stability constant of log β 110 = 3.56±0.05.
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Glorius, M., Moll, H., Geipel, G. et al. Complexation of uranium(VI) with aromatic acids such as hydroxamic and benzoic acid investigated by TRLFS. J Radioanal Nucl Chem 277, 371–377 (2008). https://doi.org/10.1007/s10967-007-7082-6
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DOI: https://doi.org/10.1007/s10967-007-7082-6