Inorganic Chemistry, Vol.51, No.1, 499-510, 2012
Interactions between Metal Ions and Carbohydrates. Spectroscopic Characterization and the Topology Coordination Behavior of Erythritol with Trivalent Lanthanide Ions
The coordination of carbohydrate to metal ions is important because it may be involved in many biochemical processes. The synthesis and characterization of several novel lanthanide-erythritol complexes (TbCl3 center dot 1.5C(4)H(10)O(4)center dot H2O (TbE(I)), Pr(NO3)(3)center dot C4H10O4 center dot 2H(2)O (PrEN), Ce(NO3)(3)center dot C4H10O4 center dot 2H(2)O (CeEN), Y(NO3)3 center dot C4H10O4.C2H5OH (YEN), Gd(NO3)(3)center dot C4H10O4 center dot C2H5OH (GdEN)) and Tb(NO3)(3)center dot C4H10O4 center dot C2H5OH (TbEN) are reported. The structures of these complexes in the solid state have been determined by X-ray diffraction. Erythritol is used as two bidentate ligands or as three hydroxyl group donor in these complexes. FTIR spectra indicate that two kinds of structures, with water and without water involved in the coordination sphere, were observed for lanthanide nitrate-erythritol complexes. FIR and THz spectra show the formation of metal ion-erythritol complexes. Luminescence spectra of Tb-erythritol complexes have the characteristics of the Tb ion.