Two three-dimensional metal–organic frameworks constructed by multiple building blocks of benzenetricarboxylate and bis(imidazole) ligands

Two novel metal–organic frameworks [Zn3(BTC)2(bbi)3]n (1) (H3BTC = 1,3,5-benzenetricarboxylate, bbi = 1,1′-(1,4-butanediyl)bis(imidazole)) and{[Zn3(BTC)2(bix)3 · 2.5H2O]}n (2) (bix = 1,4-bis(imidazole-1-ylmethyl)benzene) have been hydrothermally prepared and characterized. Analysis of the structure of 1 displays a 3D framework exhibiting a threefold interpenetration net of identical Zn1.5(BTC)(bbi)1.5 single frameworks. In the structure of 2, BTC3− and bix build up infinite tubes extending to a 3D non-interpenetrated porous framework. Moderate fluorescent emissions in the solid state at room temperature were observed in both the compounds.

Two bis(imidazole) ligands together with 1,3,5-benzenetricarboxylate are using as building blocks in the construction of MOFs and two novel coordination polymeric complexes with attractive structures were obtained. Their synthesis, crystal structures and properties were reported.Figure optionsDownload as PowerPoint slide