Study On Construction And Properties Of Metal-organic Framework Materials Based On Ionic Liquid Structure Elements

Metal-organic Frameworks(MOFs)are organic-inorganic hybrid materials formed by self-assembly of organic ligands and metal ions or clusters through coordination bonds with intramolecular pores.Compared with other inorganic materials,MOFs have their own relatively large specific surface area and porosity,their organic frameworks are also modifiable,realizing the unique advantages of MOFs crystal tunability and functionalization.Therefore,MOFs as a hot research in the gas adsorption separation,heterogeneous catalysis,molecular recognition testing,biomedicine and other fields has a wide range of applications.As far as we know,ionic liquids have outstanding performance in terms of gas adsorption performance and selectivity,which is of great significance.The functional groups of ionic liquids are modified on MOFs,which are nanomaterials with large specific surface area and porosity.The both functions are enriched to the MOFs,which is a multi-functional nano-material with carrier and ionic liquid.The multifunctional powdery nanometer material MOFs is cross-linked,concentrated and deviceized by the polymer material so as to obtain the multifunctional material,which combines the performance of the polymer material,the ionic liquid and the MOFs of the nanometer material.It also provides that MOFs was achieved large-scale application,industrializationd,and provides a good application prospects.I.The Ui O-67-type MOFs : Ui O-67-IL was synthesized by the self-assembly of the synthesized imidazolium salt-containing ligand and the metal ion zirconium.On the basis of this,the effect of Ui O-67-IL on different gases(carbon dioxide,Nitrogen,methane)adsorption,Ui O-67-IL have a relatively high adsorption capacity and selectivity for carbon dioxide.Thus,Ui O-67-IL was used as a carbon dioxide fixing agent and at relatively mild conditions,In addition,the obtained membrane can also be a highly active heterogeneous catalyst for CO2 transformation by cycloaddition with epoxide under an ambient pressure.It completed the enrichment and application of both functions.? Based on previous studies,Ui O-66-type MOFs:Ui O-66-IL-Br were synthesized by self-assembly using the synthesized hydroxyethylimidazolium salt-containing ligands and metal zirconium ions.On this basis,Ui O-66-IL-Br,Ui O-66-IL-PF6,Ui O-66-IL-SO3CF3 and Ui O-66 with different anions were obtained by ion exchange of Ui O-66-IL-Cl O4,respectively.In-depth study of its adsorption capacity and selectivity of carbon dioxide,Ui O-66-IL-Cl O4 carbon dioxide adsorption capacity and selectivity are far superior to the other ones.In the meantime,in order to solve the problem that nano-particles are hard to be formed and deviceized,Ui O-66 nano-particles(NPs)and terminal isocyanate-terminated urethane oligomers are post-synthesized and polymerized successfully to form a bifunctional solid chemical crosslinked NMOF Membranes,the chemically cross-linked NMOF membrane,still retains the Ui O-66-IL-Cl O4 unique carbon dioxide adsorption capacity and selectivity,at the same time,it can be used as a fixed agent and heterogeneous catalyst,achieving efficient catalytic cycloaddition of oxygenates.The results show that we can synthesis functionalized organic ligands and introduce the functional groups into the framework of MOFs,It can be used to enrich the two functional groups.At the same time,the use of polymer materials can be integrated into the MOFs,Realize the functionalized nanoparticles MOFs in heterogeneous catalysis,gas separation,detection and identification,biomedical applications.