Preparation,Characterization And Propertiesn Of Novel Porous Organic Polymers

In recent years,environmental issues have received increasing attention.One of them is the explosiveness and high toxicity of nitro explosives,which has caused widespread concern in the fields of groundwater,soil and social defense security.On the other hand,the long-term half-life of radioactive iodine is harmful to the human body.Porous organic polymers?POPs?,as an emerging class of functional materials,have received extensive attention from chemists.Porous organic polymers have good mechanical stability,high surface area,and controllable surface functions,which make them widely used in gas adsorption,separation,catalysis and ion extraction.?1?Firstly,three kinds of fluorescent porous organic polymers were prepared by Suzuki coupling reaction using 1,3,6,8-tetrabromopyrene?TBrPy?and boronic acid monomers as the building blocks.The structure and properties were characterized by Fourier transform infrared spectroscopy,thermogravimetric analysis,nitrogen adsorption,solid ultraviolet spectroscopy and fluorescence spectroscopy.The analysis results show that the porous organic polymer has good thermochemical stability and large specific surface area,and has good adsorption capacity for CO₂.At the same time,the excellent fluorescence properties of these material make it ideal for the detection of specific nitro compounds.These POPs materials were tested for the fluorescence response of benzene,bromobenzene,aniline,toluene,chlorobenzene,phenol,nitrobenzene,p-nitrophenol and p-nitrochlorobenzene.The experimental results in this paper show that the POPs materials have good fluorescence detection performance for the detection substrate containing nitrobenzene structure.By comparison,LNU-10 has the best fluorescence detection performance for p-nitrophenol,and LNU-9 has the best fluorescence detection performance for p-nitrochlorobenzene.?2?Using1,3,5-triethynylbenzeneandorganicmonomerswithdifferent configurations as building blocks,four novel porous organic polymers were prepared by Sonogashira-Hagihara coupling reaction,and their structures and properties were characterized by Fourier transform infrared spectroscopy,thermogravimetric analysis,powder X-ray diffraction and nitrogen adsorption.The experimental results show that the porous organic polymer has excellent thermochemical stability and porous structure.Since the material structure contains nitrogen and a benzene ring,it has a specific interaction force with respect to iodine molecules,thereby enabling efficient capture of radioactive iodine.