Synthesis And Application Of Covalent Organic Polymers Containing Triazine Ring

Covalent organic polymers are well known as highly cross-linked porous materials,which have amorphous to semi-crystalline properties and are mainly formed by strong covalent bonds.Due to its characteristics of low density,large specific surface area,stable skeleton structure,rich surface functional groups,adjustable pore structure,good stability and high porosity,it attracts many researchers’interest.With the continuous development of research,covalent organic polymer materials show good application prospects in many fields such as multiphase catalysis,energy storage,photoelectric materials,fluorescence sensing and gas adsorption separation.This thesis mainly around,the application of organic polymer materials,the related work,through the introduction of rich nitrogen functional groups in the covalent organic polymer skeleton,as adjustable support material,using functional active site with metal ions have a stronger interaction,designed and synthesized metal modification of catalyst,and applied to the neighboring amino methyl cross dehydrogenation reaction;By introducing sulfur-containing functional groups into the covalent organic polymer framework,sulfur-containing nitrogen-rich polymer materials were designed and synthesized and applied in the field of Au（III）adsorption.The specific research content and results of this paper are as follows:A covalent organic polymer material（N-COP-1）containing triazine ring was synthesized by solvothermal method with melamine and melamine chloride as synthetic monomers.Cu/N-COP-1 was obtained by loading Cu（II）onto the material through conventional impregnation method,and then it was applied to catalyzed o-amino-methyl cross dehydrogenation of phenol.The results show that the catalyst has a good catalytic effect without using any ligand,and the reaction is also suitable for the extended reaction substrates.Various substituted phenols and N,N-dimethylaniline are successfully converted into corresponding products.In addition,the catalyst can be reused after simple drying,and the catalytic performance does not decrease significantly after repeated five cycles.A sulfur-containing,nitrogen-rich organic polymer S-COP-1 was successfully synthesized by solvothermal method using terephthalaldehyde and formamidine disulfide dihydrochloride as raw materials,and it was used for Au（III）adsorption.The experimental results show that the material has high selectivity and adsorption capacity for Au（III）.And it can quickly adsorb a large amount of Au（III）in a short time.In the kinetic experiments,the adsorption conforms to the pseudo-second-order kinetic model,which indicates that the adsorption process is dominated by chemical adsorption.In the isothermal adsorption experiment,the adsorption conforms to Langmuir adsorption isotherm,and the maximum adsorption capacity is up to 1506 mg·g^-1at 45 ℃.