Syntheses, Structures And Properties Of Coordiation Polymers And Their Nanocomposites Based On Ligands Capped By Carboxyl Or Pyrimidinyl Group

Metal–organic frameworks(MOFs), as an emerging class of porous hybrid materials, exhibit promising applications for adsorption/separation, sensing and catalysis. In this thesis, sixteen compounds based on open-chain ether-bridged carboxyl ligands, carbazole-bridged carboxyl ligands and fluorine-bridged pyrimidinyl ligands were obtained. Their single crystal structures were fully characterized by X-ray single-crystal diffraction. The physical and chemical properties of some compounds were also investigated.I. The self-assembly coordination chemistry based on open-chain ether-bridged carboxyl ligands(L1-L4) with metal ions was investigated and five novel coordination compounds were obtained. Their single crystal structures were fully characterized by X-ray single-crystal diffraction. A discrete molecular cage with Cu(II) as the metal site was synthesized.II. The self-assembly coordination chemistry based on carbazole-bridged carboxyl ligands(L5-L8) with metal ions(M=Mg(II), Cd(II), Ni(II)) was investigated and four novel coordination compounds were obtained. Their single crystal structures were fully characterized by X-ray single-crystal diffraction. Owing to its good stability, the 3D Cd(II)-MOF can adsorb iodine in a SC-SC fashion.III. Three morphologies micron-crystallization of Cd(II)-MOF were synthesized in different conditions. Two composite materials named amorphous Fe2O3@Cd-MOF and Fe3O4@Cd-MOF were obtained by vapor deposition of Fe(CO)5. Their catalytic efficiency of degradation reaction of rhodamine B were studied. Cd S quantum dots @Cd-MOF compound was synthesized by one pot assembly. The catalytic efficiency of photocatalytic hydrogen evolution experiment was discussed briefly.IV. Seven novel coordination compounds based on fluorene-bridged pyrimidinyl ligands(L9-L13) with metal ions were obtained.Their single crystal structures were investigated. The study indicates that the structures of coordination compounds can influenced by several factors, such as the substituent of ligand,anion.