Study On The Design, Assembly And Performance Of Chiral Fe (Salen) Functional Materials

Metal-organic frameworks (MOFs) as the new functional materials, showextraordinary application value in diverse areas such as solid phase catalysis, gasadsorption, Medical imaging and drug delivery. Recently, Introducing chiral in metal-organic framework materials to explore its chiral recognition and separation, chiralsolid phase catalysis and chiral fluorescent application performance has become thefocus of researches done by scientists. In this paper, we use the classic organic smallmolecules based on chiral Schiff-base, after modification, coordinated with iron andassembling with transition metal, finally got two kinds of chiral porous frameworkmaterials MOF1and MOF2. And we do regular testing and asymmetric catalyticperformance study with them. This paper is divided into four chapters：In Chapter1，We introduce an synopsis for topics background, including theconcept proposing of MOFs, the major synthetic methods of MOFs, the applicationexamples in asymmetric catalysis, chiral recognition and separation and chiralfluorescent, and the opportunities and challenges remained in thesis area. The designidea and research progress were also discussed and presented in the end.In Chapter2，the classic chiral Schiff-base molecules used as a basic skeleton,and the benzene rings of it was post-tranlational modificated by pyridine group toform the functional organic compound H2L1. Then H:Li was coordinated withFe(OAc)2to form FeLi which assembled with Zn(OAc)2and biphenyl diformate toemerge the MOF1. Its frame structure was confirmed by the X-ray single crystaldiffraction and infrared spectroscopy and thermogravimetric analysis. It showedefficient activity towards the sulfoxidation with an enantioselectivity up to80%.In Chapter3，It was through the similar synthetic route to MOF1: successivelysynthesized H2L2and FeL2li2+gands, then reacted with Cd, finally afforded the MOF2. Do the Characterization of MOF2same to MOF1. It showed efficient activitytowards the sulfoxidation with an enantioselectivity up to96%. In Chapter4, Comparing the two MOFs from ligand synthesis to crystallinestructure, and we use the difference to explain the results of the oxidation of sulifdecatalyzed by them. At last，a briefly summary and prospect of this thesis was given.