Construction Of Mechanically Interlocked Supramolecular Polymers Driven By Discrete Metallacycle–Based Host–Guest Molecular Recognition

In view of this,this thesis firstly reviewed the synthesis and application of mechanically interlocked supramolecular polymers,polyrotaxane and polymer network structures in recent years.Then this thesis presents the following topics.In Chapter 1,the main chain or branch chain based linear supramolecular polyrotaxane structure,Daisy chain unit polyrotaxane structure,polyrotaxane network structure,dendritic polyrotaxane structure and other structures are introduced in recent years,which have been applied to molecular machines,supramolecular gels,catalysis and sensors.At the same time,different shapes and sizes are also introduced.Construction of platinum（Ⅱ）metallacycles and its application in functional materials,drug delivery,chemical sensors,light capture systems and other fields.On the basis of these researches,the design idea of our project is summarized and put forward.In Chapter 2,we designed the platinum（Ⅱ）metallacycles M₁ modified by 7-diethylaminocoumarin group,and the neutral guest molecule G with naphthalene central group and anthracene modification at both ends to seal the terminal.Through the photocycloaddition reaction,the guest molecule G was first polymerized to form a linear poly-rotaxane axis,which was driven by the dynamic reversible of platinum（Ⅱ）metallacycles and the recognition of host and guest of platinum（Ⅱ）metallacycles.A linear mechanically interlocked supramolecular polyrotaxane M₁G containing naphthalene was constructed.In Chapter 3,we designed and synthesized naphthyl-carbofuran-modified platinum（Ⅱ）metallacycles M₂ and neutral guest molecule G₁ with naphthylimide as the central group.Firstly,the recognition ability of platinum（Ⅱ）metallacycles to construct quatranane M₂G₁ was explored through its host-guest recognition function,and the complexation constant was calculated.A linear mechanically interlocked supramolecular polyrotaxane M₂G₂ containing naphthalimide was constructed by using anthracene group as the center of the synthesis of naphthalimide,and the end-bound guest molecule G₂ was modified by anthracene group through photocycloaddition reaction,and driven by platinum（Ⅱ）metallacycles host-guest recognition driven by the dynamic reversible property of platinum（Ⅱ）metallacycles.