Synthesis Of Functionalized Conjugated Microporous Polymer And Properties Of Its Application For Water Treatment

Since the 21st century,the global industrial development has reached an unprecedented prosperity.At the same time,the shortage and pollution of the water have become more and more serious,therefore,the treatment of water pollution has attracted the attention of scholars both at home and abroad.Microporous polymers as a class of covalently bonded organic porous materials show a wide range of applications due to their high specific surface area,well-defined pore size,and functional sites.Combining the above,we synthesized the water purification agent through Sonogashira–Hagihara cross-coupling reactions of bromomonomer and1,3,5-triethylbenzene and 1,4-diacetylenylbenzene,respectively.Solid-state ¹³C cross-polarization magic angel spinning?CP/MAS?NMR spectra and Fourier transform infrared spectroscopy?FTIR?were measured to confirmed structure of the synthesized polymers.The elemental composition of them were identified by elemental analysis?Vario EL?,Elementar,Germany?and scanning electron microscopy with energy dispersive X-ray?SEMEDX,JSM-6700F,JEOL,Ltd.?.Thermogravimetric analyser?TGA,Perkin Elmer?curves of polymers were measured and recorded to evaluate the thermal stability of th e polymers.The morphology of the polymers were observed by scanning electron microscopy?SEM?.The pores of the as-prepared polymers were studied by nitrogen adsorption and desorption experiments.By analyzing the above characterization results,we obtain ed a series of conjugated microporous polymers containing specific functional groups with good stability,interesting morphology and excellent pore properties.Applying the benzothiadiazoles-containing conjugated microporous polymers for removal of drug residues in water,and choosing tetracycline as a model antibiotic,the performance of the benzothiadiazoles-containing?CMPSN?for the removal of tetracycline from water was systematically investigated.Research showed that the active site of thiadiazole could bind specifically with tetracycline to remove the residual tetracycline in water.It is worth noting that the adsorption amount of CMPSN-2 could reach 43.89 mg g^-1.By comparing the adsorption amount of before and after treatment polymers for tetracycli ne,founding that the pore size of the adsorbent was not the main factor for the adsorption of tetracycline.The findings obtained from this work explain the mechanism of removal tetracycline.The hydantoin-containing conjugated microporous polymers?named as CMPH?were applied for inhibiting the microorganisms in water.Escherichia coli?E.coli?and Staphylococcus aureus?St.aureus?were selected as representative bacteria to complete a series of bacteriostasis experiment s.The antibacterial activity of CMPH were positively correlated with its concentration,and high antibacterial activity(completely inhibiting the growth of bacteria at 100?g m L^-1 dispersion concentration in 120 min)of CMPH-1 was measured.In addition,superiority of polymer inhibition the growth of bacteria was also be conducted through series of systematic inhibition experiments.