Design Synthesis And Properties Of Tridentate Schiff-Base And Urea Functional Complexes

Metal-organic frameworks have one of the important and hot topics of chemistry in recent years because of their potential applications in heterogeneous asymmetric catalysis,energy gas storage,degradation of organic dyes and electrochemical applications.In this paper,a variety of Schiff-base bridging ligands bearing different sizes,binding abilities,and electronic and stereo configurations will be designed and synthesized based on the tridentate Schiff-base skeletons.A series of novel metal-organic porous materials featuring diverse structures and functionalities will then be constructed based on the principles of coordination and crystal engineering.The structures and properties of the complexes were characterized by X-ray single crystal diffraction,Fourier transform infrared spectroscopy,powder X-ray diffraction and thermogravimetric analysis.Besides,the research will be focused on studying the asymmetric catalytic properties of MOFs inheterogenous processes.Therefore,substrates with different sizes and structures will be judiciously selected to explore the activity,selectivity and recyclability of frameworks-based catalysts.First of all,we explored the electrochemical applications of Co(?)and Ni(?)metal complexes which were synthesized by one-pot synthesis using the synthesized ONO Schiff base ligand.Subsequently,a one-dimensional metal complex of mononuclear Cu(?)and a two-dimensional bimetallic complexe of Cu(?)and Cd(?)with dinuclear copper structure were synthesized by solvothermal method.Among them,the dinuclear copper structure has excellent catalytic performance,the yield of catalyzed Friedel-Crafts alkylation can reach 99%,and the yield of six cycles is still up to 93%.Finally,we synthesized a Cu-MOF containing urea groups and explored its catalytic activity.The results show that this catalyst have excellent catalytic activity for the alcoholysis reaction of epoxy compounds and Henry reaction,for alcoholysis reaction yield can reach 99%,and can be recycled for 10 times.It is also capable of degrading many organic dyes and is easy to separate from sewage.In summary,this study will provide scientific support and research basis for the development of heterogeneous catalysis and contribute for design and synthesis of promising metal-organic materials as well as further promotion of science and technology.