Synthesis And Properties Research Of Metal-Coordination Polycondesate Based On Oxyquinoline & Ferrocene And Molecular Containing Oxyquinoline & Methionine

Metal-coordination polymer containing 8-hydroxyquinoline and Ferrocenyl polymer served as a new class of functional polymer with lots of special electronic, electrochemical, optical and magnetic properties had extensive application prospects and important values in academic research. Then, on the basis of molecular designs and functional designs, we synthesized a series of metal-coordinated polymers based on ferrocenyl-dis(8-hydroxyquinoline schiff base), and its structures and some performances were studied too.In this paper, a novel compound of dis(8-hydroxyquinoline schiff base) containing ferrocenyl group was prepared by polycondensation between dis(8-hydroxyquinoline schiff base) and 1,1′-dichroloformyl- ferrocene by means of special molecular designs. Then metal-coordinated polymers containing ferrocenyl group and 8-hydroxyquinoline were obtained by self-assembly property. At the same time, because of certaining electronic delocalization between the coordinated metallic atom M (Fe, Co, Ni, Cu, et al) and the iron atom in the ferrocene, these polymeric compound contained both metallic atom delocalization structure of"magnetic"group and the great conjugated system consisted of cyclopentadienide ring and conjugated substituent of the"conductive"group. In the meanwhile, the structure and performance of the composite were characterized by means of elementary analysis, infrared absorption spectrum(IR), thermal gravimetry analysis(TGA), fluorescent spectroscopy, X-ray power diffraction method(XRD), and so on. And the magnetic properties of some compounds were studied under applied magnetic intensity in frequency 0~1.5GHz.Results showed that the final products were just the objects we wanted, but its chemical structures were comparatively complex, and many ways existed in the type of metallic coordinate linkage. We couldn't ascertain their purity and chemical structure absolutely for the moment, because the polymer hardly cultivated single crystal restricted by our condition and technical level.Meanwhile, we found that all series of compounds were provided with fine thermal stability, especially metal(Cu)-coordinated polymers containing ferrocenyl group and 8-hydroxyquinoline. For the type compounds of dis(8-hydroxyquinoline schiff base) containing ferrocenyl group, the thermal decomposition temperature of 1,1'-divinylferrocenyl polymer could be enhanced by means of introducing dis-(8-hydroxyquinoline) group into the polymer. However, the thermal stability of metallic coordination polymer hardly enhanced in comparison with its ligands. It was possible that the energy of coordinate bond formed between metallic ion and polymer was trival in comparison with that of covalent bond in polymer. It started with coordinate bond when the coordinate polymer decomposed under high temperature, so it engendered little for the thermal stability at high temperature.The researches on X-ray diffraction showed metal-coordination polymers and its ligands took on minicrystal (microcrystalline) with short-range order, but its crystallinity was not quite ideal. Compared with spiculate diffraction peak of inorganic compound, X-ray diffraction of these compounds was formed by speculate crystalline diffraction peak and amorphous-state diffuse scattering peak.The emission fluorescence spectra of all the compounds ranged from 425nm to 550nm when excited by the light of maximal excitation wavelength(390nm) at the room temperature. Metal-coordination polymers and its ligands exhibited stronger solid tripartite-peaks fluorescence properties, and the fluorescence intensity of metal-coordination polymers got better improvement compared with that of its ligands. It might be that when its ligands was coordinated with another metallic atom M(Fe, Co, Ni, Cu), being formed new ring structure make molecule inflexibility better.The result of magnetic anlysis confirmed that magnetic susceptibility of all compounds is positive value, and its value ranged from 10-2 to 10-6. This is a proof that metal-coordination polymers and its ligands is paramagnetic complex at room temperature. Compared with that of its ligands, the coercive force and the remanence of metal-coordination polymers become stronger. The reason might be come from electron exchange of the coordinated metallic atom M (Fe, Co, Ni, Cu, et al) and the iron atom in the ferrocene.In addition, the researches on N-(8-hydroxy-5-quinolinemethyl) methionine zinc-coordinated complex are still at the exploratory stage, and lots of testing works are on the march which will lay the groundworks for continued studies.