Synthesis And Properties Of Salen-based Porous Organic Polymer

Information,materials and energy are the three pillars of human social development.Among them the material is the most basic.In recent years,porous materials with high surface area and light quality have attracted extensive attention.Especially,the porous organic polymers(POPs)consisting of simple structural units have been developed rapidly by scientists and have show important application prospects in gas storage and separation,organic optoelectronic devices,heterogeneous catalysis and electric energy storage,etc.In recent decades,metal complexes with Salen ligand show good performance in catalytic field.It is simple,convenient and efficient method in industry to get β-amino alcohol by the ring-opening reaction from epoxides and amines.β-amino alcohol can be directly applied in pharmaceutical,secondary chemicals and spices,etc.From the previous reports,it was found that precious metals and toxic metals were used as catalysis in ring-opening reaction,that limits its widespread use.Among metal catalysts,Fe(III)has high abundance,non-toxic,inexpensive and non-polluting properties.Meanwhile it can be complexed with the Salen ligand.In chapter three,we synthesized a POP by the oxidative coupling reaction of Salen-linked bis-carbazole with anhydrous ferric chloride as coupling reagent.In the oxidation polymerization process,the anhydrous ferric trichloride was excessive,which results in that the Fe(III)can be loaded in organic porous material directly.This material has a large specific surface area,good thermal stability and load rate.It shows good gas adsorption capacity and catalytic performance.The material was applied to catalyze ring-opening reaction of the epoxides and amines of β-amino alcohol.Meanwhile the yield of β-amino alcohol was not significantly reduced when the catalyst has been cycled several times.In chapter four,we synthesized an organic porous material by the condensation of Salen bialdehyde and 1,3,5-tris-(4-aminophenyl)-triazine through solvothermal method.The material with luminescent unit and chelating unit shows good fluorescent performance and chelating ability.This material has a good detection effect for Cu2+ and can also occur strong fluorescence quenching in presence of other metal cations or anions.When adding strong complexing agent EDTA,the fluorescence intensity can be restored and be used for the second test,it shows good reusability.The material expands the application of porous materials and has a very important significance in metalion detection.