The Application Of Acid-base Founctionalized Cr-MIL-101 In The Henry Reaction

As a kind of new porous materials, the basic and application research of metal-Organic frameworks(MOFs) develop rapidly. Due to the structure diversification and porosity, metal–organic frameworks(MOFs) have potential applications in the areas of gas sorption, catalysis, separation, drug delivery, and catalytic. In recent years, the post synthetic modification of metal-organic frameworks(Post synthetic Modification, PSM) are put forward, and defined as the pore surface chemical Modification of the known metal- organic framework by using the classic method of organic synthesis( such as acylation reaction, condensation reaction, etc.). The introduction of new functional groups improves or changes the properties of original metal-organic framework, and expands the application range greatly in the areas of catalysis, fluorescence, gas storage, etc. For catalysis application, we choose MIL-101 with good thermal stability and chemical stability, porous, ligand with modifiable groups to modify, and used for Henry reaction; For fluorescence application, We prepared a serious of 3D lanthanide metal-organic frameworks(MOFs) with same structure and investigated its application in fluorescence.1. Cr-MIL- 101- NO2 was synthesized under solvothermal condition, and then was reduced to MIL- 101- NH2 with SnCl2. Finally Cr-MIL-101-NH2 was modified with 2-Bromoethylamine hydrobromide. The structure and thermal of functional MIL-101 were characterized by the XRD, thermal gravimetric(TG), BET, and NMR.2. The functional catalysts were evaluated in Henry reaction under 90°C. Through the contrast experiment of different catalysts, we found that the functional catalyst showed high conversion and selectivity. Then we investigated the Henry reaction with different aldehydes and nitro-methane, which performed high conversion and selectivity.3. We prepared a serious of 3D lanthanide metal-organic frameworks(MOFs) with same structure [Ln(BTMC)(DMF)]?2.5(DMF) ? 3(H2O)(Ln = La(1), Ce(2), Pr(3),Nd(4)) under solvothermal conditions. the single crystal X-ray diffraction, X-ray powder diffraction(PXRD), infrared spectroscopy and thermal gravimetric characterization of the four compounds were characterized, and the capture of different metal ions and the adsorption of dye eosin and solid fluorescence spectral changes of methyl orange was studied.