Postsynthetic Modification Of Metal-organic Framework UMCM-1-NH₂and The Research Of Solid Luminescence

Metal-organic frameworks (MOFs) are porous, crystalline materials composed of metal ions or metal ion clusters and multidentate organic ligands. MOFs have been increasingly investigated for nonlinear optical materials, molecular selection, catalysis, magnetism as a result of their highly ordered pores, larger surface areas and chemical tunability. Recently, Postsynthetic modification (PSM) of MOFs has been shown to be a approach for expanding the application of MOFs in some areas. The thesis mainly includes preparation of a functional MOFs and its applications in analytical chemistry.In Chapter1, some basic concepts related with MOFs, their applications were briefly reviewed. Then, focused on the background, concepts, methods, appear time and application of PSM. Finally, the significance of this study and research purposes were mentioned.In Chapter2, UMCM-1-NH2was modified with salicylaldehyde(sal) by PSM, generating a new MOF—UMCM-1-NH2-sal which was used to capture some metal ions(Mg, Zn, Co, Ni, Cd, Fe, Cu) to yield UMCM-1-NH2-Msal, They were characterized by1H-NMR, P-XRD, BET, TG, ICP and was researched by fluorescence with some emphasis. The result indicated that the emission peak of UMCM-1-NH2-sal was red shifted and relative fluorescence intensity was lowered greatly, the emission peak of UMCM-1-NH2-Msal was blue shifted, the relative fluorescence intensity of UMCM-1-NH2-Mgsal was strengthened to maximum.In Chapter3, UMCM-1-NH2was modified with2-pyridinecarboxaldehyde and4-pyridinecarboxaldehyde. Then they were used to capture some metal ions(Mg, Zn), changes of BET were discussed, focused on fluorescence, compared differences of fluorescence changes and analysed the reasons.