Synthesis and characterization of homo- and heterometallic metal–organic frameworks based on 1,2,4,5-benzenetetracarboxylate ligand

•Synthesis of two new three-dimensional metal-organic frameworks.•The metal organic framework of 1 with unusual 4-connected pts topology.•Zn-Li heterometallic organic framework 2 with (4, 4, 8)-connected network topology.

Two new three-dimensional metal–organic frameworks, [H2N(CH3)2]2[Zn(btec)]·DMF (1, H4btec = 1,2,4,5-benzenetetracarboxylate acid) and [H2N(CH3)2][ZnLi(btec)]·DMF (2), have been solvothermally synthesized and structurally characterized by single crystal X-ray diffraction. Compound 1 based on μ4-btec features an anionic homometallic framework with 4-connected pts topology. Compound 2 is a heterometallic organic framework with rare (4, 4, 8)-connected network topology, which can be considered as constitute of a Li-btec (pts) net and a Zn-btec net. Moreover, the luminescent properties of two compounds are investigated in the solid state at room temperature.

Graphical abstractTwo new 3D homometallic and heterometallic metal–organic frameworks were synthesized and structurally characterized as a pts network and a rare (4, 4, 8)-connected network.Figure optionsDownload full-size imageDownload as PowerPoint slide