Functional Molecular Design And Synthesis With The Mimicking Catalytic Bromination Property

Vanadium complexes have been studied for a long time owning to the biological and catalytic properties of relevant systems, such as haloperoxidation, nitrogen fixation, metalloprotein, and insulin mimicking. In particular, since the discovery of the vanadium haloperoxidases, scientists were interested in its catalytic properties and mechanisms. Because most of the natural enzymes are proteins and inherently bear some serious disadvantages, they are easily denaturazed as the environment changes, and difficult to separate. Therefore, we want to design synthesis some model complexes which can replace the natural haloperoxidases in the bromide catalytic reaction.Vanadium haloperoxidases model complex is mainly imitating the active center of the natural enzymes, the active site is considered to consist of oxidovanadium with V=O moiety containing O, N donor ligands. Therefore, what the most important thing in designing the model complexes is to choose ligands with nitrogen and oxygen atoms. Up to now. the structure and coordinated environment of the model complexes have been reported are not consistent with the natural enzymes. While study showed that these complexes are also have catalyze activity. Meanwhile, the literature showed that copper complexes can also have catalytic activity, so we try to investigate the practicability for catalytic oxidation using copper complex as peroxidase.In this paper, we designed and synthesized four vanadium complexes and six transition mental complexes. The structures of these complexes are determined by X-ray single crystal diffraction and characterized by elemental analysis, IR spectra and UV-vis spectroscopy, thermal analysis. In addition, we studied the relationship between the structure and catalytic activity of the model complexes1-3and5-7.