Imidazolyl Dicarboxylic Acid Complex Synthesis, Structure And Nature Study

In this thesis, twenty-two coordination complexes have been synthesized by the hydrothermal (solvothermal) reactions of 4,5-imidazoledicarboxylic acid or N,N'-1,3,- imidazolediacetic acid with many metal salts. The study on synthetic conditions and topological analyses of the coordination polymers are carried out. These complexes structurally characterized by single crystal X-ray diffraction and the thermal stabilities and fluorescent properties of these complexes have been studied. The metal ion, organic ligand, pH value and co-ligands play interesting roles in the topological structures of ten complexes constructed by the transition metals and 4,5-imidazoledicarboxylic acid. Especially, the complex 7 has an Open-Frameworks with 1-D channels and exhibits a strong blue fluorescent emission in the solid state at room temperature, and it may be a good candidate polymer as blue–light emitting materials. In the seven complexes based on the main group metals, 4,5-imidazoledicarboxylic acid exhibit two kind novel coordination modes (μ4-η7 andμ5-η7) and construct three 3-D polymers with novel topology structures (PtS, 45.65,SrAl2); In the five coordination polymers on the basis of the N,N'-1,3,- imidazolediacetate acid, the ligand exists as zwitterionic and exhibits interesting bis-monodentat, tetradentate bridged and bis-bidentate chelate coordination modes.