With Pyridine As The Base Of Bending Properties Of Self-assembly Chemistry And Organic Ligands

The chemistry of organic-inorganic supramolecular coordination chemistry is one of the most dynamic area of research in chemical industry. Supramolecular complexes driven through coordination have novel structures and important applications in light, electricity, magnetism chemistry and catalysis. In this thesis, a series of bent ligands bridging by1,3,4-Oxadiazole five-membered heterocycle and1,2,4-Triazole five-membered heterocycle, linear organic ligands and carboxylic acid ligands were synthesized. The self-assembly coordination chemistry based on these ligands and metal ions was investigated. Totally41new coordination compounds were prepared and fully characterized by IR, elemental analysis, X-ray single-crystal diffraction and powdered X-ray diffraction.I. The self-assembly chemistry based on a series of1,3,4-Oxadiazole-bridged pyridine ligands and Cd(II) has been investigated. Eleven structures of novel coordination polymers were synthesized based on them. The results indicate that supermolecular could indificate and separate the mixed-ions SCN-/N3-. We can also realize the result of space groups transformation and tunable luminescent based on anion-exchange. Preliminary study indicated that anion-exchange based on MOFs could even effect the results of small molecule adsorption and separation.II. The self-assembly chemistry based on a series of1,3,4-Oxadiazole-bridged pyridine ligands and Cd(II) has been investigated. Four structures of novel coordination polymers were synthesized based on them. The research shows that the color of the coordination polymers could change with the anion-exchange process, which has important significance for the study of anion visual sensor.III. Fifteen new coordination polymers were synthesized based on the1,3,4-Oxadiazole-bridged pyridine ligands and inorganic Hg(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)、Ag(Ⅰ), which were not reported in literature before. Their single crystal structures were investigated.IV. Six new coordination polymers were synthesized based on1,2,4-Triazole-bridged pyridine ligands and Ag(I), which were not reported in literature before. Preliminary study have been indicated the absorption and desorption of solvent molecules based on the Ag-MOFs. We have also researched the anion-exchange process.V. Five new coordination polymers were synthesized based on linear pyridine ligands and derivatization of4,4’-biphenyl acid ligands with Cd(II), Hg(II) and Ag(I). Their single crystal structures were investigated.Research results show that our design synthesis of bend type and linear organic ligands are good templates to build supramolecular self-assembly bodies. Supramolecular frameworks with new structures and excellent features could be got when they self-assemble with transition metals, which lays the experimental basis for tunable luminescence based on anion-exchange and anionic visual sensors.