Study Of Self-Assembly Chemistry And Synthesis Based On Open-chain Polyether-bridged Ligands With Multi-teeth Groups

Flexible ligands are very important ligands, Because their coordination structures are changeful, the structures of metal complexes are infinite change. Self-assembly of organic ligands and inorganic metal ions easily get unexpected results. Open-chain polyether-bridged ligands are common flexible ligands, which can present different bent degrees according to different chemical structures of the metal ions . By changing types and structures of the terminal groups of the open-chain polyether-bridged ligands , we can effectively change its complexation reactivity and complexation selectivity. open-chain polyether-bridged ligands are important organic ligands, which have good coordination ability, soft curvature degree and flexible cyclization role, In addition, the self-assembly of organic ligands and inorganic metal ions can get some rich-oxygen tunnels, which provide the possibility that we research inorganic materials .In recent years, the supramolecular chemistry research has not only confined to self-assembly of single organic ligand and inorganic metal ions. With the development of research, the chemist notice that when using mix ligand with appropriate structure, they also can build supermolecule with novel structure, This kind of the coordination polymers with special structure and performance has good advantage in the molecular recognition. In addition, the self-assembly of a single flexible organic ligand and inorganic metal ions may easily get the interpenetrating structure, which make hole smaller. In order to reduce and avoid the thrust to get the big tunnels, we often add rigid ligands in the self-assembly of flexible organic ligands and inorganic metal ions.In this thesis, a series of flexible open-chain polyether-bridged ligands with nitrogen heterocyclic were synthesized. The coordination chemistry based on these new ligands and metal ions was investigated. 32 new coordination compounds were prepared and fully characterized by IR, elemental analysis, X-ray single-crystal diffraction, TGA, luminescent properties and thermal stability were investigated.I. The coordination chemistry based on a series of shorter open-chain polyether-bridged ligands with inorganic Co(II),Cd(II),Zn(II),Ni(II),Cu(II),Pd(II)和 Ag(I) salts has been investigated. twenty new coordination polymers were synthesized based on them. The results indicate that the different ligands have great influence on the final structures of the products.II. The coordination chemistry based on a series of open-chain polyether-bridged imidazole-containing or benzimidazole-containing ligand with inorganic Co(II),Cd(II),Zn(II)和Cu(II) salts has been investigated. Six new coordination polymers were synthesized based on them. The results indicate that the coordination patterns of the ligands, rigid aromatic carboxylic acid co-ligands, the weak interaction between molecules have great influence on the final structures of the products. Their luminescent properties were investigated in the solid state.III. The coordination chemistry based on a series of open-chain polyether-bridged bis-[(pyridyl)-benzimidazole] ligand with inorganic Co(II),Cd(II),Ni(II),Zn(II)和Cu(II) salts has been investigated. Six new coordination polymers were synthesized based on them. The results indicate that the coordination patterns of the ligands, rigid aromatic carboxylic acid co-ligands, the weak interaction between molecules have great influence on the final structures of the products. Their luminescent properties were investigated in the solid state.These studies demonstrated that the use of the flexible open-chain polyether-bridged ligands as precursors with N-containing heterocyclic ring to bind metal ions, is in fact a new and efficient approach for synthesis of novel supramolecular systems with interesting fluorescent chemical and physical properties.