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        From Novel Pseudorotaxanes, Supramolecular Polymers to Mechanically-Responsive Polymers-Design, Preparation and Applications
»ã±¨ÄÚÈݼò½é£ºPseudorotaxane, which is the necessary precursor for many supramolecular species, such as rotaxanes, catenanes and polypseudorotaxanes, has been widely used to make novel molecular machines, self-repairable materials and drug delivery materials. The development of novel pseudorotaxane systems with high association constant and novel topology is an important direction in supramolecular chemistry. In my presentation, the design and preparation of a series novel easily-prepared pseudocryptand-type [2]pseudorotaxanes with remarkably improved association constants will be discussed. Moreover, design and development of novel non-covalent bond based supramolecular polymers have continuously attracted considerable attention due to their fundamental and technological importance toward human life as new synthetic materials. In the second part, I will talk about the preparation of novel AA BB type supramolecular polymers with high molecular weight and interesting pseudorotaxane architectures. In addition, since mechanical force is a well-known factor triggering mechanical bond scission, which eventually causes polymer material failure, it is of high significance to characterize the mechanical strength of chemical bonds in order to prevent the failure of materials and design of strong materials. Finally, I will talk about a robust tool established by us to characterize the relative mechanical strength of chemical bonds by employing sonication technique and non-scissile mechanical reaction of mechanophores.
»ã±¨ÈËÐÕÃû£ºZhenbin Niu
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