Self-Assembly Chemistry Based On Ligands Containing Oxadiazole-thione And Hetercyclic Carboxylic Acids With N-Containing Templates In Hydrothermal Condition

The organic-inorganic supramolecular chemistry driven by coordination interaction has recently become area of increasing interest. Self-assembly of organic ligands and inorganic metal ions is one of the most efficient and widely used approaches for the construction of organic-inorganic composite materials. Recently, remarkable progress has been made in the area of molecular inorganic-organic hybrid compounds. The synthesis and charaterization of infinite one-, two-, and three-dimensional networks have been an area of rapid growth. In the thesis, a series of novel dendritic and double-armed organic ligands containing 1, 3, 4-oxadiazole-2-thione with -N or -CN as coordination sites have been synthesized. The self-assembly chemistry based on these new ligands and metal ions was investigated. 1, 3, 4-oxadiazole bridging semi-rigid carboxylic acid and carboxylic acid containing hydroxy-quinoline ring have been synthesized. The in situ reaction of these ligands with transitional M(II) salts have been investigated under hydrothermal condition. Totally 43 new coordination interaction driving compounds were prepared, and fully characterized by IR, elemental analysis and single-crystal X-ray diffraction.1,The coordination chemistry based on dendritic 1, 3, 4-oxadiazole-2-thione bridging organic ligands and inorganic Ag(I), Cd(II) and Hg(II) salts has been investigated. Six new coordination polymers were synthesized based on them. The results indicate that the metal ions, the counter-anions, the ratio of reactants have great influence on the final structure of the product..2,The coordination chemistry based on two-armed 1, 3, 4-oxadiazole-2-thione bridging organic ligands and inorganic Ag(I), Ni(II), Cu(II) and Zn(II) salts has been investigated. Eleven new supramolecular compounds were synthesized based on them. The results indicate that the bend angle between the two terminal N-donors of the ligands, the counter-anions, the coordination group have great influence on the final structure of the product. Their luminescent properties were investigated in the solid state.3,The coordination chemistry based on 1, 3, 4-oxadiazole bridging semi-rigid carboxylic acid ligands and potential functional transitional M(II) (M = Mn, Co, Ni, Cu and Zn(II)) salts has been investigated under hydrothermal reaction. Eighteen new supramolecular compounds were synthesized based on them. The results indicate that the position of substitute group, the coordination patterns of the ligands, the N-containing template, the weak interaction between molecules have great influence on the final structure of the product. Their luminescent properties were investigated in the solid state.4,The coordination chemistry based on a novel 2-hydroxylquinoline-4-formyl with Pb(II), Mn(II), Co(II) and Cd(II) salts has been investigated under hydrothermal reaction. Seven new supramolecular compounds were synthesized based on them. The results indicate that the the N-containing template, the weak interaction between molecules have great influence on the final structure of the product. The primary investigation on the in situ reaction under light was made. Their luminescent properties were investigated in the solid state. The bent 1, 2, 4-triazol carboxylic acid was used to generate a novel 2D framework with CdCl2 under hydrothermal reaction.5,The primary investigation on the color-changing property of the coordition polymer generated from 2, 5-bi(3-acetylenylphenyl-(4-pyridine))- 1, 3, 4-oxadiazole and Co(SCN)2 was made. We guess it's because of the inclusion and exclusion of the guest solvent molecules.