Syntheses, crystal structures, and magnetic and luminescent properties of a series of lanthanide coordination polymers with chelidamic acid ligand

Abstract

A series of lanthanide(III) complexes with chelidamic acid ligand, [Ln(C 7H 2NO 5)·3H 2O] n · nH 2O (Ln = La ( 1), Y ( 2), Sm ( 3), and Nd ( 4)), [Gd 2(C 7H 2NO 5) 3·4H 2O] n ·2 nH 2O ( 5) and [Ce(C 7H 2NO 5)·1.5H 2O] n ( 6), have been synthesized by hydrothermal method and structurally characterized by single-crystal X-ray diffraction. Complexes 1– 4 are isostructural and possess 2D framework. Complex 5 contains two different Gd(III) ions linked through carboxylate group to form a 2D framework. Complex 6 exhibits a (4 4) topology 2D network. The variable-temperature magnetic properties of 3 and 5 have been investigated. Furthermore, the photoluminescent properties of 1, 2, 3, and 5 at room temperature were also studied.