Fluorescent dialdehyde ligand for the encapsulation of dinuclear luminescent lanthanide complexes

Abstract

Five dinuclear lanthanide complexes [Ln(III)(2)(hpd)(6)].solvent, Ln(III) = Eu(III) (1.2MeCN), Gd(III) (2.2MeCN), Tb(III) (3.MeCN.MeOH), Dy(III) (4.2MeCN), Ho(III) (5.2MeCN) and Hhpd (2-Hydroxyisophthaldehyde) were synthesised and structurally and magnetically characterised. X-Ray structural analysis shows all complexes are isostructural and crystallise in the triclinic P1 space group. The dinuclear complexes are composed of eight-coordinate lanthanide ions linked by two phenoxide bridges from two hpd(-) ligands. Complex 1 exhibits characteristic fluorescence in the visible region.