| In this thesis,two semi-rigid tricarboxylic acid ligands:3-[(1-carboxynaphthalen-2-yl)oxy]phthalicacid(H3L1)and4-[(1-carboxynaphthalen-2-yl)oxy]phthalic acid(H3L2),and five nitrogen-containing heterocyclic ligands were selected.Seven novel coordination polymers were obtained by hydrothermal or solvothermal method with transition metal ions and main metal ions.The structure and properties of coordination polymers were studied by X-ray single crystal diffraction,infrared spectroscopy,powder X-ray diffraction,thermogravimetric,UV-visible spectroscopy and fluorescence spectroscopy.1.H3L1 wasselectedasthemainligand,3-[(4-imidazol-1-yl)benzene]-5-(pyrid-4-yl)-1,2,4-trizole(ibpt),1-1'-[oxybis(4,1-phenylene)]bis(1H-imidazole)(opbi)and 1,10-phenanthroline(1,10-phen)as co-ligands,three coordination polymers:[Co2(HL1)2(ibpt)4]n(1),[Co3(L1)2(oppi)4·2H2O]n(2),[Cd2(HL1)2(1,10-phen)]n(3)have been successfully synthesized using transition metal ions Co(?)and Cd(?)as metal sources.1,2 and 3is a one-dimensional chain structure.Dye degradation test shows that 1 and 2 can degrade methylene blue dye well.Fluorescence recognition and detection results show that the 3 can selectively recognize Ag+and Mn O4-,and can recognize acetone,nitromethane and nitrobenzene.2.H3L2 wasselectedasmixedligandwith4,4'-di(1H-imidazol-1-yl)-1,1'-biphenyl(dibi),1,4-di(1H-imidazol-1-yl)benzene(dibe),respectively.The mixed ligand reacted with main group metal ions Pb(?)and transition metal ions Zn(?),Cd(?)by hydrothermal or solvothermal method and four coordinationpolymers:[Pb2(L2)(dibi)0.5(Cl-)(H2O)]n(4),[Zn4(L2)2(dibi)2(NO3-)2(H2O)2·3H2O]n(5),[Cd3(L2)2(dibe)3(H2O)3·4H2O]n(6),[Zn3(L2)2(dibe)3.5]n(7)were synthesized.5 and 6 are 2D layered framework,and 4and 7 are 3D framework.Fluorescence recognition detection results show that 4 can selectively identify Fe3+and Mn O4-;5 can selectively identify Ag+and Cr2O72-;6 can selectively identify Fe3+and Cr2O72-;7 can selectively identify Ag+and Mn O4-.Moreover,these coordination polymers all have fluorescence recognition for nitromethane and nitrobenzene. |
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