Complex formation of uranium(VI) with the amino acids l-glycine and l-cysteine: A fluorescence emission and UV–Vis absorption study |
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Authors: | A Günther G GeipelG Bernhard |
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Institution: | Forschungszentrum Rossendorf e.V., Institute of Radiochemistry, P.O. Box 510119, 01314 Dresden, Germany |
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Abstract: | The complexation of uranium(VI) with the amino acids l-glycine and l-cysteine has been investigated by time-resolved laser-induced fluorescence spectroscopy (TRLFS) and UV–Vis spectroscopy at a low pH range. The identified 1:1 and 1:2 uranyl-l-glycine complexes fluoresce and have similar absorbance properties. In contrast to the glycine system, uranyl forms two different non-fluorescent 1:1 complexes with l-cysteine, showing individual absorbance properties under the given experimental conditions. The corresponding complex formation constants were calculated using the spectroscopic data. |
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Keywords: | Uranium Complexation Amino acid TRLFS UV&ndash Vis spectroscopy |
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