Synthesis And Research Of Metal-Organic Frameworks (MOFs) Based On N-containing Ligands For Luminescent Detection And Photocatalysis Properties

Metal-organic frameworks?MOFs?,which are synthesized by combining metal ions and organic ligands,have been widely used for more than two decades since its inception,due to their unique interesting topological structure,as well as their advantages such as designable and porous structure with high specific surface.Benefit from their variety of properties,MOFs can be applied in energy storage,materials,drug transportation and biomedicine.The research of MOFs has been not only the discovery of their structures and simple properties,but also the practical application and prospect of the recently.With the rapid development of human society,more energy and environmental problems are gradually exposed,such as greenhouse effect,energy shortage and environmental pollution.The method of solving these urgent serious problems has been the focus of the research.The research of MOFs based on N-containing ligands has been taken for luminescen detection and photocatalysis properties.Potential value in solving environmental problems is also mentioned.1.A novel MOF assembled by Cd²⁺and N-containing multi-carboxyl ligands3,3?-??6-amino-1,3,5-triazine-2,4-diyl?bis?azanediyl??di benzoic acid?abbreviated as ATBDC?is reported to sensor harmful hydrocarbons molecules.Series of researches are taken to describe the properties of MOFs on photoluminescence.Along[100]and[010]directions,this MOF shows hexagonal hydrophobic channels,with size 18.4×15.5?².Being excited by light peaking at 338 nm,this MOF emits blue light peaking at 397 nm.After immersed in the solutions of different aromatic hydrocarbon,the luminescent intensity enhanced different degree within different time.A possible explanation of the change is raised.The MOF shows potential application prospect in recognition of harmful hydrocarbons.2.Co-ZIF-9,a classic MOF assembled by benzimidazole and Co²⁺,is designed and modified by loading Ag nano-particles?Ag NPs?as photocatalyst in photo-deposition method.The effect of Ag NPs in CO₂ photo-reduction was studied by controlling the amount of Ag NPs.[Ru?bpy?₃]Cl₂·6H₂O was used as photosensitizer,and TEOA as electron donor,to realize the conversion of CO₂ to CO.With 0.5 hour's irradiation of visible light???420 nm?,the reactivity of Ag@ZIF-9 enhances more than 2 folds.The results show the promotion of Ag NPs in CO₂ photo-reduction.