Synthesis, structure and luminescence property of Eu(III) metal–organic framework based on 2,2′-bipyridine-5,5′-dicarboxylic acid

•Synthesis of new metal organic framework based 2,2'-bipyridine-5,5'-dicarboxylic acid.•The complex 1 exhibits two types of binuclear metal units.•Excellent Eu luminescent properties of complex 1.

A novel trivalent europium, Eu(III), 2,2′-bipyridine-5,5′-dicarboxylic acid (bpdc) metal–organic framework, namely, [Eu4(bpdc)6(CH3NH2)3(DMSO)(H2O)] 1 was synthesized by the solvothermal reaction of bpdc with trivalent Eu(III) salts in a mixed solvent system containing N,N′-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). The single X-ray diffraction indicated that complex 1 had a novel porous three-dimensional framework with two different binuclear metal units. The photoluminescence spectrum of the complex displayed strong emission maxima at 472 and 618 nm.

Graphical abstractThe complex exhibits two types of binuclear metal units, bridged together by bpdc ligands forming a 3D MOF. Additionally, the complex exhibits characteristic Eu luminescence, indicating that it is a potential light-emitting candidate.Figure optionsDownload full-size imageDownload as PowerPoint slide