Two Lanthanide Coordination Polymers Constructed from Diphenic Acid: Syntheses, Crystal Structures, and Magnetic Properties

Abstract

Two lanthanide(III) coordination polymers, [Ln2(dpa)3 (H2O)2]n (Ln = Pr, 1; Ce, 2), were self-assembled from diphenic acid (H2dpa) and corresponding lanthanide(III) salts under hydrothermal conditions. The compounds were found to be isostructural. Single-crystal X-ray diffraction studies show that both compounds are one-dimensional chain structures, which are further extended into three-dimensional supramolecular frameworks through π − π interactions. Magnetic studies for complex 1 show weaker antiferromagnetic coupling between the Pr(III) ions.