Study Of Self-assembly Chemistry And Hydrothermal Synthesis Based On Ligands Bridged By Five-membered Heterocylic Rings With N-containing Templates

The chemistry of organic-inorganic coordination polymers and supramolecularcomplexes has recently become an active area of increasing interest internationally.Self-assembly of organic ligands and inorganic metal ions is one of the most efficientand widely used approaches for the construction of organic-inorganic compositematerials. In this thesis, a series of1,3,4-oxadiazole and flexible open-chainpolyether-bridged ligands were synthesized. The coordination chemistry based onthese new ligands and metal ions was investigated; Meanwhile, The Hydrothermalsynthesis based on a series of carboxylic acid and pyridine classes ligands.28newcoordination compounds were prepared and fully characterized by IR, elementalanalysis, X-ray single-crystal diffraction, TGA, luminescent properties and thermalstability were investigated.Ⅰ. The coordination chemistry based on a series of1,2,4-triazole-bridged carboxyl-ic acid ligands with N-containing templates and inorganic Cd(II) and Pb(II) saltshas been investigated. Three new coordination polymers were synthesized basedon them. The results indicate that the dual-and bimodal-emission weresuccessfully realized by intercalation of the different Ln3+hydrates based onguest-driven approach. In addition, the energy transform from Tb3+to Eu3+occurs.Ⅱ. The coordination chemistry based on a series of pyridine classes ligands and CuIhas been investigated. Nine new coordination polymers with multinuclear copperclusters were synthesized based on them. The results indicate that theconformation of semirigid ligands are versatile and different from rigid ligands,the coordination patterns of the ligands are excessive; In addition the rigid ligandscan construct metal-organic frameworks with high-dimension and permanentcavity.Ⅲ. Coself-assembly of1,3,4-Oxadiazole bridged and open-chain polyether-bridgedpyridine terminated ligands with transition metal ions leaded to ten polymers dri-ven by coordination and π-π interactions. Nine new coordination polymers was synthesized based on the same ligand and different Ag(I) salts via accommodatethe reactive temperature. Furthermore, the tunable luminescent properties is succ-essfully realized by intercalation of the different anions based on guest-driven a-pproach.Ⅳ. The coordination chemistry based on a series of1,2,4-triazole-bridged ligandswith O-containing templates and inorganic Co(II)、Ni(II) and Cd(II) salts hasbeen investigated. Three new coordination polymers were synthesized based onthem. The results indicate that the solvent molecule and the weak interactionbetween molecules have great influence on the final structure of the product.Ⅴ. The coordination chemistry based on HCOOH and inorganic Co(II)、Ni(II) andMn(II) salts has been investigated. Four new coordination polymers weresynthesized based on them. The results indicate that the PH has great influence onthe final structure of the product. Furthermore, the dual-and bimodal-emissionwere successfully realized by intercalation of the different Ln3+based onguest-driven approach.This study demonstrated that the novel supramolecular systems with goodperformance provide the opportunity for the host-guest chemistry study. Also, it is infact a new and efficient approach for synthesis of novel supramolecular systems withinteresting fluorescent chemical and physical properties.