The Synthesis And Properties Study Of Porous Organic Frameworks Materials

Porous organic frameworks materials due to their variety of synthetic methods,large specific surface area and adjustable function have widely attracted the attention of scientific researchers.In the last twenty years,coordination polymer with porous properties and new porous organic polymer（POPs）formed by covalent bonding has become a research hotspot of scientists.Porous organic polymer frameworks material has opened up another new field for the study of porous materials.At present,coordination polymer and porous organic polymer framework materials are widely used in the fields of gas storage,gas separation,catalysis,ion sensing,photocatalysis,batteries and supercapacitors,ion exchange,proton conduction,drug delivery and other fields.In this paper,the model compound P of porous organic polymer was synthesized first,and a new type of porous organic polymer framework was successfully synthesized on the basis of the model compound.In addition,a coordination polymer was prepared by solvothermal synthesis using organic monomer with a modifying group as a secondary building unit.Firstly,we synthesized the model compound P of porous organic polymer according to Schiff base reaction by 1,3,5-trialdehyde phloroglucin and naphthalimide derivatives.The structure of the model compound P was characterized by 1H NMR and elemental analysis and the properties of the compound P as an ion fluorescent probe were studied.The results showed that compound P showed a fluorescence quenching effect on Fe²⁺ and Cu²⁺ in DMSO solution.The degree of quenching is linearly related to the concentration of Fe²⁺.In addition,the fluorescence of the complex P-Fe formed by compound P and Fe²⁺ ions can be enhanced by H₂PO₄^-anion,and the fluorescence intensity of the solution increases linearly with the increase of H₂PO₄^-concentration.Metal complex P-Fe can selective fluorescence sensing of H₂PO₄^-by "off-on" mode.The detection limit of the complex P-Fe to H₂PO₄^-was 1.897 × 10-7mol / L.Secondly,based on the structure and properties of model compound P in chapter 2,we have obtained the porous organic polymer POP-1 by adjusting the structure of naphthalimide derivatives.The characterization of POP-1 was studied by powder X-ray diffraction,infrared spectroscopy,nitrogen adsorption and thermogravimetric analysis.The properties of POP-1 as catalyst for the degradation of dye RhB were studied.It was found that POP-1 had a high catalytic activity for the degradation of RhB,and its activity did not decrease significantly after three repeated catalytic reactions.It was also found that POP-1 could still efficiently catalyze the degradation of RhB under natural light.In addition,the kinetic study of POP-1 photocatalytic experiment was carried out.The results show that the increase of temperature can increase the rate of degradation reactions.The activation energy of the photodegradation reaction was 82.37 kJ / mol.Finally,coordination polymer 1 was prepared with metal cadmium salt by using 2,2?-bipyridine and 2-aminoterephthalic acid which with an amino reactive group as organic ligands.X-ray powder diffraction（XRD）,elemental analysis and thermogravimetric analysis（TGA）were used to characterize the structures of 1.Moreover,we investigated the properties of 1 as a fluorescent probe for the detection of Cu²⁺ and cyclohexane small molecules.