Supramolecular Self-assembly And Properties Of Q[n] And Water-soluble Polymers

In this paper,a series of polymers were designed and synthesized:polyethylene glycol-8-hydroxy-1,3,6-pyrene trisulfonate sodium（PEG-HPTS）,polyethylene glycol naphthol（PEG-NP）,polyethyleneimine derivative（BPEIH）,and four kinds of cucurbit[n]urils（Q[n]s）based supramolecular polymers were constructed by using several Q[n]s（Q[5],Q[8],Q[10]）.Among these,Q[8]-based supramolecular polymers were successfully prepared through the action of outer surface for the first time.The properties and applications of these four Q[n]-based supramolecular polymers were explored respectively,the research contents of this paper mainly include the following three aspects:Part Ⅰ:The polymer of PEG-HPTS was prepared by introducing sulfonic acid pyrene（HPTS）into the end of polyethylene glycol（PEG）chain.Based on the fact that PEG-HPTS contains a large number of sulfonic acid groups and can be used as the active site to form hydrogen bond,the supramolecular polymer Q[8]@PEG-HPTS was constructed by using the positive electricity of methine and methylene on the outer surface of Q[8].A series of characterization methods were used to verify that Q[8]and PEG-HPTS were formed through the interaction of outer surface,and the supramolecular polymer as a probe had specific recognition effect on Fe³⁺and paraquat.In addition,it can stain HMCs and HK2 cells for imaging.What’s interesting is that by constantly adjusting the ratio of Q[8]to PEG-HPTS,the hydrogel with temperature responsive response is obtained.Part Ⅱ:Similarly,PEG-Np was synthesized by introducing electron rich group naphthalene（Np）at the end of PEG chain,and then compounds containing electron deficient group（TPy P-BC）were designed and synthesized.Two kinds of Q[n]-based supramolecular polymers（Q[8]@PEG-NP@TPy P-BC and Q[10]@PEG-NP@TPy P-BC）were constructed through host-guest interaction,and their structures were characterized by a series of methods.The results showed that the effect of Q[8]@PEG-NP@TPy P-BC,Q[10]@PEG-NP@TPy P-BC,the ternary host guest Q[n]-based supramolecular polymer was formed,respectively.Part Ⅲ:Taking advantage of the porosity of cucurbit[n]urils,through the design and synthesis of polyethyleneimine polymer（BPEIH）,and then constructed the supramolecular polymers of Q[5]@BPEIH,its structure is confirmed by a series of characterization methods,indicating that it is a fluffy and porous structure.The results show that the supramolecular polymer of Q[5]@BPEIH can remove 2,7-dihydroxynaphthalene,Neutral Red and I₂ pollutants from water quickly and with high load.The supramolecular polymer Q[5]@BPEIH designed and synthesized by us has the characteristics of low synthetic cost,fast adsorption speed and strong removal ability.