Study On Syntheses,Structure And Properties Of Novel Complexes Based On V Type Aromatic Dicarboxylic Acid

As a new type of organic-inorganic composites,metal organic-coordination polymers have the potential applications in catalysis,gas storage,biosensing,optical and magnetic fields due to the highly surface,size and function that can be easily tuned have attracted wide attention.In this paper,we mainly study the a type of V,semi-rigid benzophenone 4,4-dicarboxylic acid ligand,with hydrothermal and solvothermal method,adjust the auxiliary ligands and metal ions,then we synthesized a series of novel metal-organic coordination polymers,and the compounds were analyzed by infrared spectrometry and single crystal X-ray diffraction,thermogravimetric analysis.Power X-ray diffraction,elemental analysis characterization to describe the structure of compounds,and studied the structure properties of some compounds.The study work was divided into three parts:1?Five novel structural compounds have been obtained that were synthesized by self-assembly with benzophenone-4,4-dicarbonylic acid and rare earth and transition metal.Compound 1 is a one dimensional chain structure with rare earth neodymium metal.Introducing the auxiliary nitrogenous ligand 4,6-bis?2-methimidazole?pyrimidine,got a three-dimensional compound 2 which has good stability.Compound3 has nano pore and binuclear metal cluster was obtained.It has PCU topological structure.Changing the size of the substituent,introducing 4,6-Bi?2-ethylimidazole?pyrimidine,forming a one-dimensional nanotubular structure compound 4,and the minimum diameter of the nanotube was 20.32?.Compounds 5 was by adjust lead to auxiliary nitrogenous ligands 3,6-Bi?2-methidazole?pyridazine,we obtained a two dimensional net structure with good fluorescence properties.2?A series of CuO/CeO₂ catalysts were prepared by using compound 2 as precursor system,and the catalytic properties of CO were studied.By powder-X ray diffraction,Raman diffraction,H₂-TPR,CO-TPD,and nitrogen desorption characterizations implies that the calcination temperature,the heating rate and the metal ratio have a great influence on the enhancement of the interaction between copper oxide and cerium oxide,it has a great influence on increasing the dispersity of the active species on the catalyst.3?Compounds 3 and 4 both have nano channels,so the adsorption properties of compounds 3 and 4 for organic dyes were studied.The adsorption mechanism of organic dye Congo red?CR?was studied from the aspects of adsorption kinetics,isotherms and thermodynamics.It was found that the adsorption kinetic model of compound 3 and 4 conforms to the pseudo-second-order kinetic model,while the adsorption isotherm model,compound 3 was in good agreement with the Freundlich isotherms model,and compound 4 was more consistent with the Langmuir adsorption isotherm model.In addition,the fluorescence properties of compounds 3 and 4 after adsorbing fluorescein RB6G were used to detect the ability of the cadmium2,4-pentanedionate,Copper?II?acetylacetonate,bis?pentane-2,4-dionato-O,O'?zinc in aqueous solution.Finally,the complexes were loaded with Au,Pd and the catalytic activity of CO and the coupling reaction of Heck was investigated.4?The effects of different solvents on the fluorescence properties of compound 5were investigated.The experimental results show that the adsorption and transfer of energy between the solvent and the metal organic complexes.Duing to the different interactions between solute solvent and solvent leads to the decrease of the luminescence intensity and even the quenching.