Divalent cobalt, zinc, and copper coordination polymers based on a new bifunctional ligand: Syntheses, crystal structures, and properties

•Three novel coordination polymers have been synthesized.•Intriguing 3D frameworks were obtained and characterized.•H2L is a good candidate for construction of coordination polymers.

Three new coordination polymers, namely, [ML(H2O)]n (M = Co (1), Zn (2)) and [CuL(DMF)]n (3), have been hydrothermally synthesized through the reaction of bifunctional ligand 5-((2-methyl-1H-imidazol-1-yl)methyl)benzene-1,3-dioic acid (H2L) with divalent cobalt, zinc and copper salts, and structurally characterized by elemental analysis, IR and X-ray diffraction. Both complexes 1 and 2 are two-fold interpenetration 3D frameworks. Complex 3 exhibits (3,6)-connected framework with (4.62)2(42.610.83) topology. Furthermore, UV–vis absorption spectra and powder X-ray diffraction (PXRD) were investigated as well.

Graphical abstractThree new metal–organic frameworks, namely, [ML(H2O)]n (M = Co (1), Zn (2)) and [CuL(DMF)]n (3) (H2L = 5-((2-methyl-1H-imidazol-1-yl)methyl)benzene-1,3-dioic acid, DMF = N,N′-dimethylformamide), have been hydrothermally synthesized. Both complexes 1 and 2 are two-fold interpenetration 3D frameworks. Complex 3 exhibits (3,6)-connected framework with (4.62)2(42.610.83) topology. Furthermore, UV–vis absorption spectra and powder X-ray diffraction (PXRD) were investigated as well.Figure optionsDownload full-size imageDownload as PowerPoint slide