Construction And Properties Of Metal-organic Frameworks Based On Two Dicarboxylic Acid Ligands

Coordination polymers are formed by organic ligands and metal ions or metal clusters through the coordination bonds.They have attracted researchers'attention not only because the diversity of organic ligands,different kinds of functional groups and coordination modes of metal ions,but also for their potential applications in gas adsorption,separation,catalysis,luminescence regulation,physical sensing,drug storage and release,membrane separation and other fields.This paper,13 coordination polymers were constructed by hydrothermal and solvothermal methods.What's more,13 structures were characterized and the catalytic performances,gas adsorptions,solid fluorescences were studied,the main contents and results are as follows:?1?Based on the 4-Pyridin-3-yl-isophthalic acid as bridging ligand and by adjusting the auxiliary ligands and inorganic metal salts,successfully built a complex with one-dimensional of JN-1 and five with three-dimensional framework structure of JN-2-JN-6.The catalytic hydrogenation and CO₂ cycloaddition performance of the six complexes were explored.Furthermore,selecting relatively large porosity JN-3 and JN-5 to study the adsorption performance.?2?Based on three nitro modified ligands:2-nitro biphenyl-4,4'-dicarboxylic acid?H₂L1?,3,4'-2-nitro biphenyl-dicarboxylic acid?H₂L2?and 2-nitro biphenyl-2,4'dicarboxylic acid?H₂L3?,seven new complexes have been synthesized by hydrothermal and solvothermal methods?JN-7 reveals a 3D structure,while JN-8-JN-13 have a 2D layer structure?.The hydrothermal stability and catalytic hydrogenation performance of the seven complexes were studied,the solid-state fluorescence was studied on the JN-9 and JN-11.