A new penta-carboxylate and N-donor ligand co-regulate 3D CoII-MOF with tcj/hc topology: Synthesis, structure and magnetic property

A 3D CoII metal-organic framework, {[Co4(Hbpbc)2(4,4′-bipy)(H2O)4]·3H2O}n (1), based on a new penta-carboxylate(H5bpbc = biphenyl-2,4,6,3′,5′-pentacarboxylic acid) and 4,4′-bipyridine is presented. In 1, each μ7-Hbpbc4 − anion links five [Co2] SBUs to generate a 3D 5-connected noy net. Further, 4,4′-bipy ligands compensate for the need of Co2 coordination to regulate noy net into a 3D (5,6)-connected tcj/hc framework. Besides, the thermal stability and magnetic property of 1 were also investigated.