| Metal-organic frameworks （MOFs） are constructed as a new type of porous materialsdue to their high specific surface area, versatile structures, easily controlled porouschannels, multiple functions. This kind of materials exhibit potential application both inscientific research and industry, especially in the application of gas storage, luminescencematerials, magnetic behaviors, asymmetric catalysis, non-linear optics, etc. In recent years,designing new types of ligands and constructing multifunctional metal-organicframeworks have become a hot topic in the field of inorganic chemistry. Using rigid andmulti-carboxylate ligands especially some large ones to construct metal-organicframeworks can greatly enhance its thermal stability and scale of cavities. Besides, someof the ligands will bring varieties of excellent properties to the new materials.In this thesis, two rigid ligands:3,5-bis（3,5-dicarboxylphenylethynyl）-pyridine （L1）and9,10-bis （4-carboxylpenylethynyl） anthracene （L2） have been synthesized andcharacterized by1H-NMR and IR. Using these two ligands, three coordination compounds（1,2,3） have been constructed and characterized by X-ray diffraction analysis. Theobtained results show that framework1{[Cu24L112（H2O）12]·180H2O·12DMF} crystallizesin cubic space group Im3m, and the asymmetric unit consists of two crystallographicallyquarter copper ions, and axial position is coordinated by pyridyl N atom with Cu-Ndistance2.132（8）. In this framework, three types of pores are generated with the Cuions and bridging ligands, then3,5-bis（3,5-dicarboxyl phenyl-ethynyl）-pyridine（L）coordinate to Cu（II） ions to form metal-organic cuboctahedrons （MOCs）, but one type ofthe pores is occupied by MOC unit to create a self-interpenetrated framework.According to the absorption and thermal analysis, the observed results indicate thatsuch a three-dimensional metal-organic framework with high connection exhibits good gasabsorption capabilities and thermal stability. |
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