Self-assembly Of Anions And Urea Ligands Featuring Ester Or Amide Bond As The Linker

In recent years,anion coordination using urea ligands with different anions has attracted much attention due to their rapid and mild assembly process.Here,based on the reports of anion coordination chemistry,and the application of ester and amide bond in the construction of supramolecular architectures,we designed urea ligands with ester or amide bonds as the linker,respectively.Different structures were constructed by the coordination of those ligands with various carboxylic anions,and we explored the influence of different linkers on the resulting structures.This provides a reference for studying the self-assembly process of anions and urea ligands.The thesis is mainly divided into three parts:The first chapter is the introduction,where the development of supramolecular chemistry and anion coordination chemistry is briefly summarized;the influence of non-covalent bonds and different linkers on the supramolecular architectures is introduced by reviewing some typical cases of ester and amide bonds in supramolecular assembly.Finally,the research significance of this topic is proposed.The second chapter,we designed a series of C₂-symmetric bis（urea）ligands.Two different linkers,amine bond or ester bond,were introduced into the ligands.A variety of assemblies have been successfully constructed by the interaction between urea ligands and anions,which were characterized by X-ray single crystal diffractometer,NMR and MS.The third chapter,we designed more complex C₂-symmetric bis-bis（urea）ligands.These ligands also contained two different linkers,amide bond or ester bond,and different assemblies were obtained by hydrogen bond interaction between ligands and anions,which were characterized by NMR and MS.