Vanadium - Drug Molecular Modeling Synthesis, Characterization, And Nature Study

Vanadium is an essential trace element of human with special chemical property and bioactivities. It has been indicated that vanadium-containing functional complexes possess many potential therapeutic effects, such as lowering-glucose, anti-cancer, anti-inflammation and anti-bacterial, especially the anti-diabetes. Choosing suitable ligands is very important for designing the structure of the vanadium complexes and modulating the biochemical properties. Comparing to ordinary organic molecules, choosing drug molecules as the ligands has obvious advantages, which are not only improving the bioavailabilty of the vanadium compounds, but also enhancing the action of the drugs and lowering the toxicity of vanadium. The disadvantages of choosing drug molecules as the ligand are the complicated structures and multiple active sites, and the compounds are difficult to be synthesized. Thus, the analogs of the drug are better to be chosen as ligands. In this thesis, the oximes were chosen to be ligands, and a series of new vanadium complexes were obtained. The crystal structure, coordination features and interaction with Ct-DNA of these complexes were investigated systematically. Main contents of the thesis are given as follows:1 Review. The basic chemical properties of vanadium were briefly introduced, and the advanced researches in bioactivity of the V-drug molecule complexes were systematically summarized.2 Choice and synthesis of the ligands. The basic biochemical properties, coordination modes and general synthesis methods of oximes, and developments of V-oximes complexes were briefly introduced. Synthesis methods of five kinds of oximes were given in detail.3 Synthesis and spectrum characterization of vanadium complexes. These compounds were obtained through routine methods, and the singles crystals were cultivated by free volatilization and ether diffusing way. These complexes were characterized by IR and elemental analyses.4 Analyses of crystal structures and the biochemical properties researches of these complexes. The crystal structures of five complexes were obtained by X-ray single crystal diffraction method, and the crystal characters were described. Interactions of these complexes with Ct-DNA were investigated systematically, through UV-Vis absorption spectroscopy, fluorescence spectroscopy, cyclic voltammetry and viscosity measurements.