Study On The Synthesis,Characterization And Properties Of Several Pyridyl-containing Metal-organic Coordinations

In this thesis,six novel coordinations were synthesized by hydrothermal synthesis or solution synthesis method,using transition or rare-earth metals and pyridyl-containing ligands,such as 2,6-bis?2-pyrazinyl?-4-?4-cyanophenyl?pyridine,4'-?4-cyanophenyl?-2,2':6',2”-ter pyridine,2,2':6,'2”-Terpyridine-4'-carboxylic acid and 6-?4-carboxyl phenyl?nicotinic acid as starting materials.The structures of these coordinations were characterized using various techniques,and some properties,such as catalysis and gas adsorption,were discussed on the basis of the obtained data.The specific contents are listed as below:First,Two mononuclear coordinations,Pd?L₁?Cl?A₁?and Pd?L₂?Cl?A₂?,were synthesized by hydrothermal method using 2,6-bis?2-pyrazinyl?-4-?4-cyanophenyl?pyridine?L₁?or 4'-?4-cyanophenyl?-2,2':6',2”-terpyridine?L₂?ligand and Pd?Ac?₂ as starting materials.The structures and properties of the products were characterized using various techniques,namely,X-ray single crystal diffraction,X-ray powder diffraction?SEM?,scanningelectronmicroscopy?SEM?,thermal gravimetric analysis?TGA?,and fourier transform infrared?FT-IR?.In addition,the reaction of 2-iodobiphenyl with iodobenzene catalyzed by A₁ and A₂ was investigated.Second,some bimetal coordinations were obtained by solvothermal synthesis using 2,2':6',2"-Terpyridine-4'-carboxylic acid?Y₁?and metal salts as starting materials.Their structures and properties were characterized by SEM,SEM,TGA and FT-IR,respectively.In addition,their storage ability of carbon dioxide was also investigated.Finally,one MOF?C₁?similar to UiO-67 was synthesized by solvothermal synthesis method using excess 6-?4-carboxylphenyl?nicotinic acid ligand as building units.Its structure and properties were characterized using various techniques,such as XRD,TGA,FT-IR,and Brunauer-Emmett-Teller specific surface area analysis.Its ability of adsorption of N₂?CO₂?CH₄?O₂ were discussed.