Lanthanide-saccharide chemistry: synthesis and characterisation of Ce(III)- saccharide complexes

Abstract

A series of nine Ce(III) complexes has been synthesised with seven different monosaccharides (D-glucose, D-fructose, D-galactose, D-mannose, L-sorbose, D-ribose and D-xylose) and two different disaccharides (D-maltose and L-lactose), and these have been characterised with various analytical, spectral, magnetic and electrochemical techniques. The NMR studies have highlighted some interesting features about the metal-ion-binding pattern of the saccharides. Some additional coordination has been proposed along with the chelating groups in the saccharide molecules, based on the shifts in ¹³C NMR spectra. On the other hand, solution absorption studies and solid-state magnetic susceptibilities have indicated the contribution from the D-character to the spectral features to some extent.