Study On The Synthesis Of Hydroxycucurbit[6]uril-Based Two-dimensional Linear Polymer And Three-dimensional Frame Polymer And Their Properties

In this paper,the linear and framework polymers containing the cucurbit[6]uril were obtained by the Williamson etherification reaction.The properties of the polymers were studied in detail.The following sections were included in this paper.?1?The hydroxylated cucurbit[6]uril was prepared by H₂O₂ photochemical oxidation,and then the hydroxylated cucurbit[6]uril was polymerized with dibromoalkane to obtain two-dimensional linear and three-dimensional framework polymers by stepwise polymerization.The structure of the polymer was characterized by nuclear magnetic,infrared and GPC.The morphology of the polymer was also studied by transmission electron microscopy and scanning electron microscopy.The surface activity and the aggregation morphology of the two-dimensional linear polymer in aqueous solution were studied in detail in the paper.The results show that linear polymer?OH?_n-CB[6]-1,5-dibromopentane,?OH?_n-CB[6]-1,8-dibromooctyl The alkane,?OH?_n-CB[6]-1,10-dibromodecane aggregate in aqueous solution to form regular hollow spherical vesicles.The hollow portion of the spherical vesicle was determined to be hydrophobic by the method of laser confocal microscopy,and its hydrophobic properties will be applied to drug release,Therefore,In this paper,methyl orange was used as a model molecule and its encapsulation and release conditions were studied.By changing different stimulation conditions,the structure of polymer vesicles was destroyed,which led to the slow release of hydrophobic drugs.The results show that the polymers have better sustained release properties.We also characterized the polymer?OH?_n-CB[6]-1,6-dibromooctane,?OH?_n-CB[6]-1,8-dibromooctane by ¹H-NMR and IR.The structure of?OH?_n-CB[6]-1,10-dibromodecane was characterized by scanning electron microscopy.The preliminary study found that the polymer has a three-dimensional network structure.?2?In this paper,a three-dimensional framework polymer was prepared by stepwise polymerization of hydroxycucurbituril and ?,?'-dibromo-p-xylene.The structure of the polymer was characterized by infrared.The morphology of the polymer was also observed by scanning electron microscopy.This kind of polymers also have the supramolecular properties of cucurbit[6]uril and strong rigidity.This kind of three-dimensional network polymer can be used as catalyst carrier.Supporting nano-metal particles on the surface of the framework polymer can effectively prevent the agglomeration of the nano silver particles and improve the catalytic effect to facilitate repeated recycling of the catalyst.The catalyst with frame polymer material as carrier has the advantages of simple preparation,controllable particle size and low cost.In addition,the frame polymer material has a low density,which can suspend and disperse the catalyst in the aqueous solution,increase the contact area between the catalyst and the contaminant,thereby improving the catalytic efficiency.Therefore,we studied in detail the catalytic reduction of contaminant p-nitrophenol by different amounts of silver?0.05 g,0.15 g,0.25g?as a carrier,and the results were determined by UV-Vis spectrophotometer.The results show that the smaller the particle size of the polymer carrier-loaded silver nanoparticles?large specific surface area?,the better the catalytic reduction effect.