Synthesis,Characterization And Properties Study Of Boron,Nitrogen And Phosphorous Compounds

The continuous development of society,science and technology updated continuously and quickly which improve the quality of daily life.To perception of new things,new technology is also desired immediately afterwards the pace of social development.From an interrelated point of view,the development of all aspects of society is inseparable from the support of new technologies,and the development of all new technologies is based on the research of new materials.Therefore,the research of new materials is an important field of social development,scientific and technological progress and human life quality.The development and application of new materials and materials have also promoted human civilization and social progress.From the microscopic point of view,the new material was derived from the analysis of the new material structure.Moreover,the new structure research laid the foundation for the application of new materials.It is an important method to understand the structure of new materials by developing monocrystal and further using single crystal diffraction.After understanding the structure of the new material,the experiment was explored,and the properties of the new material were investigated,and then the application of the new material was explored.This thesis mainly use three kinds of traditional single crystal culture method,three kinds of compounds synthesized single crystal,and is obtained by X-ray single crystal diffraction crystal and its corresponding single crystal structure after get structure.The main work of this paper is as follows:1.A series of R-substituted ammonium arylspiroborate compounds（R=CH₃,H,F,Cl,Br）have been synthesized via a facile one-pot method.The structures of these new kinds of boron compounds were characterized by IR,NMR spectra,elemental analysis and X-ray diffraction techniques,and their possible formation mechanism was proposed.Surprisingly,the as-synthesized boron compounds showed multifunctional character with not only excellent fluorescence properties（high quantum yields and large Stokes shift）in both the liquid and solid state but also high antibacterial activity against both Gram-negative（E.coli）and Gram-positive（S.aureus）bacteria.The chlorine-substituted boron compound even possessed antibacterial activity comparable with that of commercial antibiotics.More importantly,the fluorescence properties and antibacterial activity of these boron compounds could be easily mediated by the variation of the substituents,which was proved to regulate the conjugated system,modify the hydrophobic character,and adjust the electric charge on the surface of boron compounds.In addition,the influence of different factors including solvent（i.e.,polarity,concentration）,temperature,and pH on the fluorescence properties of boron compounds was discussed in detail.This work provides a new strategy for the design of multifunctional organoboron compounds and the mediation of their properties.2.Heterostructured CuO/Cu₂O composite was successfully prepared via one-step thermolysis route by using Cu complex as a sacrificial template.The CuO/Cu₂O composite inherited the polyhedral morphology from the Cu-CP,and possessed higher surface area and larger pore volume with porous structure.By regulating the Cu coordination environment in the CP,pure CuO and Cu₂O was separately obtained.Compared with pure phase CuO and Cu₂O,heterostructured CuO/Cu₂O displayed remarkably enhanced NH₃-SCR de-NO activity and N₂ selectivity in a low temperature range of 180-240 ^oC even at high gas hourly space velocity of 80,000 h^-1.Systematical in situ DRIFT characterization revealed that the NH3-SCR of NO over CuO/Cu2O heterostructure followed Eley-Rideal（E-R）mechanism,which was greatly improved by the abundant Lewis acid sites,improved O₂ adsorption and the synergistic effect between Cu⁺and Cu²⁺.Moreover,CuO/Cu2O heterostructure exhibited excellent H2O,SO2,alkali metals and hydrocarbon durability,indicating its potential use in industrial NH₃-SCR of NO_x.3.Four organic phosphine complexes P1-P4 were synthesized by hydrothermal method and systematic characterized.The structure is different of the ratio of different ligand and metal salts,pH,temperature.In this paper,the metal centers of four organic phosphine complexes of is Fe,La,Co and Co respectively.The structure of the four complexes was detected by X-ray single crystal diffraction.Moreover,the structure in different pH and the stability of the complex was studied.Furthermore,the result of XRD and BET found that the stability of synthesized four organic phosphine complexes were higher than the traditional MOF.And result of TGA show that the thermal stability of organic phosphine complexes which with three dimensional space stretching were far greater than with one dimensional space stretching organic phosphine complexes.As far as we know,the synthesis four organic phosphine complexes is much more stable than other traditional transition metal complexes.