Complexation of LnIII and CaII Cations with 3,4-Dicarboxyinulin and Model Compounds: Methyl 3,4-Dicarboxy-α-D-fructofuranoside and 3,4-Dicarboxynystose, As Studied by Multinuclear Magnetic Resonance Spectroscopy and Potentiometry
article
Complexes of LnIII and CaII cations with 3,4-dicarboxyinulin (DCI) and model compounds, methyl 3,4-dicarboxyα-D-fructofuranoside (DCF) and 3,4-dicarboxynystose (DCN) were studied using multinuclear magnetic resonance spectroscopy and potentiometric methods. Complexes of the model compounds with LnIII ions provided a feasible way in which to study complexation phenomena of the dicarboxyinulin/CaII system using NMR techniques. Information on complex geometry was derived from the effect of LnIII ions on chemical shifts and longitudinal relaxation rates. Metal-ligand stoichiometries of 1:2 and 1:1, in which the ligand coordination was tridentate as well as tetradentate, were found. Potentiometric measurements carried out with CaII yielded information on the stoichiometry as well as the cooperativity of metal ion binding by the ligands.
TNO Identifier
233582
ISSN
00201669
Source
Inorganic Chemistry, 35(19), pp. 5703-5710.
Pages
5703-5710
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