Preparation, Structure, DNA-Binding Properties, and Antioxidant Activities of a Homodinuclear Erbium(III) Complex with a Pentadentate Schiff Base Ligand

Abstract

An erbium (III) complex of a pentadentate Schiff base ligand [(NO 3 )Er(μ-L) 2 Er(NO 3 )].2H 2 O [H 2 L=bis( N-salicylidene)-3-oxapentane-1,5-diamine] has been synthesised, characterised and its structure confirmed by X-ray crystallography. H 2 L and the Er(III) complex both bind to DNA via a groove binding mode, and the Er(III) complex binds to DNA more strongly than H 2 L. The complex shows strong scavenging effects for hydroxyl radicals (OH·) and superoxide radicals (O 2 - ).