Construction of CuII Cluster-Based Magnetic Metal-Organic Framework Derived from a V-Shaped Aromatic Dicarboxylate Ligand

In our efforts towards rational design and systematic synthesis of cluster-based metal-organic frameworks, a new Cu-II coordination framework derived from the V-shaped aromatic dicarboxylate with formula [Cu-4(mu(4)-O)(L)(3)] (1), H2L=(4-phenyl)-2,6-bis(4-carboxyphenyl)pyridine) was synthesised under hydrothermal conditions and structurally characterised by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, and infrared spectroscopy. Structure analysis shows that complex 1 has a three-dimensional framework based on [Cu-8] cluster with 8-connected bcu topology. Magnetic investigation suggests that anti-ferromagnetic coupling exists between Cu-II ions in the [Cu-8] cluster.