Syntheses, Properties Of Transition Metal Coordination Polymers And Luminescence Of IRMOF3-sal Controled By Metal Ions

Metal-organic frameworks (MOFs) are porous, crystalline materials that have gathered increasing attention owing to their high surface areas, uniform pores, and chemical tunability. The ability to synthesize a wide range of MOFs has made them attractive materials for applications in gas sorption, separations, and catalysis. Recently, postsynthetic modification (PSM) of MOFs has been shown to be a general, practical approach for incorporating a wide range of functional groups into MOFs. We the preparations and properties of metal-organic coordination polymers generated from dicarboxylates ligand. Moreover, we also studied the luminescence of IRMOF3-sal controled by metal ions.This dissertation covers the following four parts:1. Under hydrothermal and solvothermal condition, third compounds were synthesized by using N,N"-bis(4-carboxyphenyl)-1,3-benzenedicarboxamide, l,4-di(1H-imidazol-1-yl)butane,4,4'-bipyridine. They were further characterized by elemental analysis, IR, powder X-ray diffraction (XRD) and TGA. The measurement and analysis of fluorescence spectra indicate that compound 1,2 are good potential solid fluorescent materials. Compound 1 exhibits high sensing of Cu2+2. An isoreticular metal-organic framework(IRMOF-3) modified with salicylaldehyde(sal) by postsynthetic modification(PSM) capture metal ions to yield IRMOF3-Msa)(M=Mg, Zn, Co, Cd, Ni, Eu, Nd, Pr, Tb). They were characterized by FT-IR spectra, elemental analysis, powder X-ray diffraction (XRD) and inductively coupled plasma (ICP). The measurement and analysis of fluorescence spectra indicate that the emission peak of IRMOF3-Msal is blue shifted and IRMOF3-Mgsal display the strongest relative fluorescence intensity.3. IRMOF3-sal is an effective bidentate ligand for metal complexation and was metallated with M(acac)n (M=Mg, Zn, Pr, Ni). IRMOF3-Msal was investigated by solid-state fluorescence spectroscopy. The fluorescence changes of IRMOF3-sal metallated with M(NO3)n were better than M(acac)n.