The Synthesis Of Pyridine Derivatives And The Research On Two Component Halogen Bonds

Halogen bonding as a non-covalent bond force,which in the field of intelligent materials has been a focus for researchers in recent years.Halogen bonding also has wide application prospects in the gels,liquid crystal materials,nanomaterials,crystal growth,electromagnetic materials and other fields.In this paper,several different series of pyridine derivatives were designed and two-component system gels were formed.Their gelation properties were fully characterized and we revealed the driving force of the gels by adopting a series of test-ways,which provides a new idea for the design of halogen-type two-component gelators.The research is as follows:1.The synthesis and properties of 5-I-1,2,3-triazole derivatives with pyridine derivatives.The structures were confirmed by NMR and HRMS.Comparison of one-component gel properties,the two component can influence the gelation by forming halogen bond.The microscopic morphology and aggregation mode of the xerogel were analyzed by SEM and XRD.In addition,we test the photoreactive properties of azobenzene derivatives and triazole two components.2.The driving force of 5-I-1,2,3-triazole derivatives and pyridine derivatives bicomponent gel was studied.We cultivated iodine triazole component single crystal instead of two component single crystal in the two-component solution to identify halogen bond and demonstrated the existence of halogen bond competition.FTIR test explores the presence of halogen bonds between two component.In addition,the liquid crystal properties of single and two-component systems were studied by POM,DSC and XRD.3.Four amide pyridine derivatives were designed.We tried to form a two-component gel system with 1,4-diiodotetrafluorobenzene through halogen bonding.Finally,we revealed the driving force of the gels by adopting a series of test-ways.