CuII coordination polymers based on 5-methoxyisophthalate and flexible N-donor ligands: Structures and magnetic properties

•Three Cu(II) coordination polymers were synthesized.•The conformations of N-donor ligands and pH value have an effect on the final structures.•The magnetic properties of 1–3 have been investigated.

Three CuII coordination polymers, {[Cu2(CH3O-ip)2(bmib)]}n (1), {[Cu2(CH3O-ip)2(bmib)2]}n (2) and {[Cu(CH3O-ip)(bbip)]∙2H2O}n (3) (CH3O-H2ip is 5-methoxyisophthalic acid, bmib is 1,4-bis(2-methylimidazol-1-yl)butane and bbip is 1,3-bis(1H-benzimidazolyl)propane), have been synthesized by hydrothermal methods. Complexes 1–3 were structurally characterized by elemental analysis, infrared (IR) spectra and X-ray single-crystal diffraction. Complex 1 shows a 3D six-connected self-penetrating network based on paddlewheel secondary building units. Complex 2 has a 3-fold interpenetrating 3D diamond framework. Complex 3 possesses a 1D tube-like chain. Thermo-gravimetric and magnetic properties of 1–3 were also investigated.

Graphical abstractStructures and magnetic properties of copper(II) coordination polymers constructed from 5-methoxyisophthalate linker and two flexible N-donor ancillary ligands. Three copper(II) coordination polymers with 5-methoxyisophthalate and two related flexible N-donor ancillary ligands have been synthesized and structurally characterized. Moreover, thermal behaviors and magnetic properties of these complexes have also been investigated.Figure optionsDownload full-size imageDownload as PowerPoint slide