Design, Synthesis,Structural Characterization And Fuorescence Studies On Metal-Carboxylate Frameworks And Metal-Carboxylate Cages

Metal-Organic Frameworks or Coordination Polymers is the aggregation of metal ions/clusters with organic linkers through coordination bond into highly structured crystals. Organic linkers as building blocks of MOFs, are not neglectable in the topology structure of MOFs and properties of target compound.Five carboxyal ligands, H4L1, H4L2, H4L3, H4L4and H2L were synthesized. By using a synthesized rigid ligand,5-(l,3-dioxo-4,5,6,7-tetraphenylisoindolin-2-yl)-isophthalic acid (H2L), three coordination polymers,[Cd(L)(DMF)(MeOH)]·DMF (1),[Cd(L)(DMF)(MeOH)]·DMF (2) and [Mn(L)(DMF)(MeOH)]·DMF (3), were synthesized and structurally characterized by elemental analysis, IR, single-crystal X-ray diffraction and thermogravimetric analysis. The single crystal structures of complexes1,2and3show that they are isostructural, and crystallize in the triclinic space group P-1. Further,1,2and3show one-dimensional2-connected{0} uninodal chain networks and generate2-D (dimensional) layers by the short contacts between the chains. Furthermore, the solid-state luminescence properties of compounds H2L,1-3are determined at room temperature. The maxima emissions are near the maximum of free ligand H2L at468nm, which indicates that the mechanism is ligand-centered emission.MOP-1was synthesized and structurally characterized by’HNMR, elemental analysis, IR, thermogravimetric analysis, PXRD. The solubility and it’s ability to capture fluorescent molecules were studied. MOP-1has excellent solubility in dichloromethane and chloroform and it provide more opportunity to the application of MOPs. The absorption of fluorescent molecules indicates cavities exists in MOP-1.Therefore, MOP-1is metal-carboxylate cages has been confirmed.In order to modifica HKUST-1of metal organic framework material by mechanochemistry.Through qualitative increase the length of pyridine molecules to change Cu3(BTC)2aperture, realize from the microporous material to the transition of the mesoporous material, and characterized by elemental analysis, IR, PXRD, thermogravimetric analysis, SEM, Mapping and N2adsorption.