Synthesis, structure and properties of three isostructure polymer networks based on mixed ligands

• We successfully prepared three coordination polymers based on mixed ligands.
• They all reveal a 3D interpenetrating framework with dia topology.
• Liquid diffusion method was first used based on bbi ligand.

Three isostructure coordination polymers with a general formula: [ML(bbi)(H2O)2]n (M = Co, 1; Zn, 2; Cd, 3) {L = fumaric acid dianion, bbi = 1,4-bis(1H-imidazol-1-yl)butane} have been successfully prepared by adopting liquid diffusion method. Their structures have been determined by single-crystal X-ray diffractions, and further characterized by elemental analysis, FT-IR spectra, Powder X-ray diffractions and thermogravimetric (TGA) studies. The results show that they all possess a three-dimensional (3D) framework constructed by the double helical chains and L dianions and reveal a 3-fold interpenetrating net with a uninodal 4-connected Diamond-related topology. In addition, the photoluminescent properties of 2 and 3 have also been investigated at room temperature.

Three isostructure polymer networks formulated as [ML(bbi)(H2O)2]n (M = Co, 1; Zn, 2; Cd, 3) {L = fumaric acid dianion, bbi = 1,4-bis(1H-imidazol-1-yl)butane} have been prepared by room temperature liquid diffusion method. Single-crystal X-ray diffractions show that they possess a 3-fold interpenetrating net with Diamond-related topology. Photoluminescent studies show that 2 and 3 exhibit intense emissions in the solid-state at room temperature.Figure optionsDownload as PowerPoint slide