| The exploitation of high-performance antibacterial materials is of great importance for maintaining public health and the sustainable development of modern society.Based on the wide application of antibiotics and the advantages and disadvantages of physical and chemical antibacterial agents,and considering the variability of the actual environment,there should be higher requirements for the tolerance and stability of porous materials under harsh conditions（high concentration,high temperature,acid-base corrosion）.However,only one antibacterial material is often difficult to meet the needs of various applications.However,porous antibacterial materials with only one antibacterial effect are often difficult to meet various application requirements.Therefore,the development of antibacterial materials with high tolerance and high performance is of great significance for its practical application.Conjugated microporous polymers（CMPs）with large specific surface area,high porosity,three-dimensional network structure and good chemical and thermal stability have attracted extensive attention in energy storage,catalysis,water treatment and other fields.At the same time,CMPs have the advantages of diverse preparation methods,flexible molecular structure design,and adjustable micro morphology.Therefore,CMPs can be reasonably designed and tailored according to their specific applications.Based on this,a series of CMPs-based nanocomposite hollow spheres with high physical and chemical stability,good adsorption and antibacterial properties were prepared by crosscoupling reaction of alkynylbenzene and bromobenzene with antibacterial group monomers and decorating with silver nanoparticles and Fe3O4 nanoparticles.The antibacterial properties and adsorption properties of organic pollutants in water were systematically studied.The main contents and conclusions of the study include:In the second chapter,interestingly,the CMPs-HSs also show an antibacterial propertywithbromide.and1,3,5-triethynybenzeneand3,7-dibromophenothiazin-5-ium,bromide for CMP2 and 1,3,5-triethynybenzene and1,4-dibromobenzene for CMP1-HSs.They were prepared by S-H cross-coupling reaction using Si O2 microspheres as hard template,Pd（0）/Cu I as catalyst,toluene and triethylamine as solvent.The as-synthesized CMPs-HSs possess good thermal stability with a thermal decomposition temperature of up to 588°C,high porosity(a BET specific surface area of approximately 556 m2 g-1 and 74.2 m2 g-1,respectively),and a unique hollow spherical morphology with an inner diameter of ca.400 nm.CMPs@Ag-HSs composite nanospheres were prepared by co-precipitation method with the prepared CMPs hollow nanospheres as the carrier.Ag nanoparticles were uniformly dispersed on the surface of CMPs-HSs,and the size was about 12-15 nm.CMPs@Ag-HSs and CMP-HSs had good antibacterial activity against Gram-negative Escherichia coli.CMP1@Ag-HSs at 15μg m L-1 completely inhibited the growth of Escherichia coli within 1 h at the bacterial concentration of 1×108 CFU m L-1.In addition,CMP1@Ag-HSs and CMP2@Ag-HSs showed excellent selective adsorption properties for organic compounds in water due to the hydrophobic and lipophilic characteristics of CMPs and the cavity structure of composite nanospheres.In the second chapter,we report the invention of novel magnetic conjugated microporous polymer hollow spheres（CMP-HSs@Fe3O4）,which were synthesized by a Sonogashira–Hagihara coupling reaction using trichloroisocyanuric acid and ethynylbenzene as building blocks in the presence of Si O2 nanoparticles,followed by the removal of the Si O2 template and then decoration with Fe3O4 nanoparticles,for the absorption of antibiotics and the sterilization of microbes in wastewater.The hollow sphere structures of the conjugated microporous polymer hollow spheres（CMPHSs）exhibited a diameter of roughly 400 nm and a spherical shell thickness of8 nm.The hollow sphere structures of the conjugated microporous polymer hollow spheres（CMP-HSs）exhibited a diameter of roughly 400 nm and a spherical shell thickness of 8 nm.At the same time,the inherently bacteriostatic property of the CMPs,as well as their abundantly accessible external surface area,originating from their hollow sphere structure,for contact with bacteria,gives the CMP-HSs@Fe3O4superior sterilization performance,i.e.,for Escherichia coli（E.coli）and Staphylococcus aureus（S.aureus）,the minimum inhibitory concentration（MIC）of CMP-HSs is 150μg m L-1.In addition,with its cavity structure,CMP1-HSs@Fe3O4also showed excellent adsorption performance against quinolone antibiotics,with the maximum adsorption capacity of 176 mg g-1 for ofloxacin antibiotics and 204 mg g-1for difloxacin. |
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