Synthesis,structures And Property Investigations Of Metal-Organic Frameworks Based On Carboxylic Ligands With Double Bond

Metal–organic frameworks?MOFs?as a new type of porous material bear many particular properties,which do not possess by the traditional porous materials.They have attracted many researchers'great interest due to their potential applications in heterogeneous catalysis,gas adsorption and separation,drug delivery,optics and magnetism.In this thesis,eleven novel metal-organic frameworks were synthesized by the reaction three designed carboxylic ligands(H₂ADDA,H₂L^OMe,H₃tatb)with the different metal ions under the solvothermal conditions,and characterized by X-ray diffraction,X-ray powder diffraction,elemental analysis,thermal analysis and infrared spectroscopy.We also investigated their properties in fluorescent sensing,catalysis,and gas adsorption and separation.The main research contents are as follows:?1?A new-type 3D complex?1?with excellent fluorescence property was constructed by H₂ADDA and Ba²⁺,and the solvent-dependent fluorescent recognition on metal ions(Fe³⁺,Al³⁺)and nitroaromatic complexes?NACs?was also investigated.?2?Three new mixed-ligand coordination networks?2-4?were synthesized by H₂ADDA,N-donor auxiliary ligands and transition metal ions.Complex 2 features a rare 3D8-connected ilc topology,complex 3 possesses a 3D open frameworks based on the infinite1D Zn-?CO₂?chain,while complex 4 bears a 2D hcb structure.We also investigated the influence of metal center and N-donor ligand on the formation of complexes.?3?Two lanthanide[Ln=Eu?5?,Pr?6?]MOFs with different structures were prepared based on the semi-rigid ligand of H₂L^OMe.Complex 5 displays a 2D net with single nodal4⁴-sql topology,while complex 6 features a 3D open framework with{4².8⁴}-PtS topology.We studied the applications of complex 6 on fluorescent recognition,selective gas adsorption and catalysis.?4?Five new Co/Zn?II?coordination polymers?7-11?are synthesized based on H₃tatb and N-containing co-ligands under the solvothermal conditions.Based on a series of characterization,we detailedly investigated the influence of N-donor configuration and solvent control on the self-assembly of crystals.