Investigation of the Interaction between 1-Hydroxyethane-1,1‘-diphosphonic Acid (HEDP) and Uranium(VI)
Inorganic Chemistry2003Vol. 42(16), pp. 5015–5022
Citations Over TimeTop 17% of 2003 papers
Christophe Jacopin, Marcin Sawicki, Gabriel Plancque, D. Doizi, Frédéric Taran, É. Ansoborlo, Badia Amekraz, Christophe Moulin
Abstract
A detailed study, using a panel of spectroscopic analytical methods, of the complexation between 1-hydroxyethane-1,1'-diphosphonic acid (HEDP) and uranyl ion (UO(2)(2+)) is reported. Results suggest that the metal complex is present as only 1:1 (metal/ligand) species at low concentration (<10(-)(4) M). The conditional constants of this complex were determined at various pH using time-resolved laser-induced fluorescence (TRLIF) and electrospray ionization mass spectrometry (ESI-MS). Further investigations indicate the presence of a 1:2 (metal/ligand) complex at higher concentrations ( approximately 10(-)(2) M). Selectivity studies as well as structural aspects are presented.
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