The Research Of Nitrogenous Heterocyclic Based Metal-Organic Frameworks

Metal-organic frameworks?MOFs?that consist of metal centers and organic ligands constitute an attractive research topic owing to their potential application prospects for adsorbents,catalysts,proton conduction devices and sensors,etc.On the other hand,the structure of MOFs with great designability could be designed to build functional materials for the application in life.Nitrogenous heterocyclic compounds with high reactivity and chemical modification which was both needed in the construction of MOFs.After reading plentiful literatures,We chose Dihydro-1,2,4,5-tetrazine-3,6-dicarboxylate?dhtz?and 2,4,6-tris?3-pyridyl?-1,3,5-triazine?3-tpt?two kinds of ligands to construct MOFs and lucubrated the chemical character,respectively.1,By utilizing Postsynthetic Exchange and Room-Temperature Synthesis,three kinds of tetrazine based UIO-66 were gotten.Then the unstable ligands was etched while the original framework retained to construct a series of hierarchically porous defective MOFs?HP-UIO-66dhtz-1^HP-UIO-66dhtz-7?with well chemical and thermal stability.Furthermore,the dye adsorption and excellent catalytic performance of catalysis the oxidative desulfurization?ODS?process provide more application potential in the future.2,The supermolecular recognition properties of a 2D coordination polymer,namely[Cd₂?3-tpt??bpta??H₂O?₃]?1??H₄bpta=1,1'-biphenyl-2,2',6,6'-tetracarboxylic acid?is reported herein.Complex 1 shows a porous supermolecular framework with strong inter-layer?-?interaction from the triazine moieties of 3-tpt ligands.Then complex 2 and complex3 were gotten by immersing complex 1 in VOCs.By utilizing its porous nature and triazine induced?-?interaction,complex 1 reveals specific supramolecular recognition and structure transformation toward benzene homologues,which is proved straight forwardly by structure investigations.Furthermore,the altered inter-layer?-?interaction of 1 in response to the molecule recognition also affect its emission properties,which indicates it potential in sensing applications.