Synthesis, Structure And Properties Of The Transition Metal Complexes

In oder to synthesis some functional metal-organic coordination compounds, the mechanism of transition metal ions reaction with carboxylic acids, Schiff bases, or other organic ligands have been studied. In this thesis, seven coordination compounds have been synthesized by the reactions of Schiff base ligands with transition metallic. The crystal structures of the compound were characterized, and the fluorescence properties for some of the compounds were measured. This article is composed of three parts.(1) We choose methanol as the solvent, at room temperature, L1 has been synthesized by the reaction of 3-amino-1,2-propanediol with o-vanillin, L2 has been synthesized by the reaction of 2-amino-2-methyl-l-propanol with o-vanillin, L3 has been synthesized by the reaction of (R)-(-)-2-amino-l-butanol with o-vanillin, and o-vanillin react with 1,3-diamino-2-propanol to form L4. According to the coordination modes of ligands, design and synthesize the transition metal complexes.(2) Reference the synthetic methods of zinc compound reported in the literature, the chiral and non-chiral Schiff bases ligands have been used to synthesize transition metal complexes. Eventually, we obtain two zinc complexes (mononuclear and dinuclear), one cubane-like tetra-nuclear copper, and another is octo-nuclear manganese clusters. The fluorescence properties of the zinc materials have been study, we found that the fluorescence intensity of mononuclear is more than dinuclear, due to hydrogen bonds exist in one-dimensional chain complexes can enhance intensity of peaks. (3) In the third charpter, a series of polynuclear complexs was prepared by the reaction of transition metal ions with carboxylic acids in hydrothermal or solvent thermal process, all of these complexes were characterized with IR, and structurally defined by X-ray crystal diffraction.