Syntheses And Properties Of Metal-organic Luminescent Materials Containing Conjugated Units

Metal-Organic Frameworks have experienced rapid development over the past decades and became one active area of research of chemistry and material science owing to their intriguing network topologies and potential applications in catalysis, separations, gas storage, ion-exchange, sensors and optoelectronics. Herein, several ligands containing conjugated units have been selected and used to build coordination polymers by selecting appropriate metal ions. The resulting polymers have been determined by single crystal X-ray diffraction. Their thermal stabilities and fluorescence et al have been explored. This thesis includes the following five chapters.In Chapter 1, the recent development of organic luminescent materials, especially rare earth and transition metal coordination polymers application in electroluminescence were summarized. The significance and progress on the topics were outlined.In Chapter 2, four organic ligands containing fluorine units were synthesized and characterized by ¹H NMR or ¹³C NMR. Thirteen 3D coordination polymers were assembled from rare earth/transition metal ions and a linear fluorene carboxylic acid ligand. single-crystal X-ray diffraction indicate that 1-5 and 7 were grid-like coordination polymers, 6 and 8 display three dimensional interpenetrated network, compound 9-13 were isomorphous compounds with 3D structure, 9 exhibit strong emission at 612 nm, display the characteristic peak of Eu.In Chapter 3, the 3,3',5,5'-tetracarboxylate, 2,2'-bpy/4,4'-bpy/phen/bpp and Zn(II) ion were used under solvethermal condition to synthesize five coordination polymers 14-18. The effects of second ligand on the structure of compound, thermal stabilities and fluorescence were discussed.In Chapter 4, the 2-phenylquinoline-4-carboxylates and 2,2'-bpy/4,4'-bpy/phen were selected to reacte with transition metal ions under hydro(solve)thermal condition yield ten compounds 19-28. single-crystal X-ray diffraction indicate that compound 19-22 were isomorphous compounds with dinuclear structure, the dinuclear units were linked by hydrogen bonding andÏ€-Ï€stacking interaction to generate 1D chains which were further assembled into a supramolecular structure. 23-25 were isomorphous compounds with dinuclear structure too, 26-28 exhibit 1D chains structure. The fluorescence properties of 19, 20, 23, 26 and 27 were studied.In Chapter 5, briefly conclusions and outlooks were given.