| In this thesis,we synthesizesd two semi-rigid carboxylic acid ligands H2L1:[2-((4-carboxybenzyl)oxy)-1-naphthoicacid],H2L2:[3-((4-carboxybenzyl)oxy)-2-naphthoic acid]as the main ligand,combining eight nitrogen-containing auxiliary ligands and transition metal ions to synthesize ten coordination polymers under hydrothermal(solvothermal)conditions.The structure and properties of the coordination polymers were studied by infrared spectroscopy,X-single crystal diffraction,thermogravimetric,powder diffraction,UV-Vis absorption,magnetic and fluorescence spectrum.1.By using the main ligands H2L1,H2L2,combined with the nitrogen-containing auxiliary ligand dine{4-(5-(4-(1H-imidazol-1-yl)phenyl)-1H-1,2,4-triazol-3-yl)pyrid ine},imida{1,4-bis((2-methyl-1H-imidazol-1-yl)methyl)benzene},mida[1,4-bis(1H-imidazole-1-Benzene],2,2-bipy(2,2'-bipyridine),bimb[1,4-bis((1H-imi-dazol-1-yl)methyl)benzene]and cobalt nitrate hexahydrate,manganese acetate tetra-hydrate,Five coordination polymers were synthesized:[Co(L2)(dine)·H2O]n(1),[Co(L2)(idima)0.5]n(2),[Co(L2)(mida)]n(3),[Mn(L2)(2,2-bipy)]n(4),[Mn2(L2)2(bimb)·H2O]n(5).The coordination polymers 1,2,and 3 are all2D network structures,the coordination polymer 4 is a 1D chain structure,and the coordination polymer 5 is a 2D network structure.Through the dye adsorption study,it was found that all coordination polymers 1-3 had selective adsorption to malachite green(MG),and the magnetic test of coordination polymer 4 showed that it exhibited antiferromagnetism.2.By using the main ligand H2L1,combined with the nitrogen-containing auxiliary ligand 1,10-phen(1,10-phenanthroline),bipy{4-methyl-1-[((4'-((2-Methyl-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-4-yl)methyl]-1H-imidazole}and zinc nitrate hexahydrate to synthesize coordination polymer under hydrothermal conditions:[Zn(L2)(1,10-phen)(H2O)]n(6),[Zn2(L2)2(bipy)·H2O]n(7).The coordination polymer 6 presents a 1D chain,the coordination polymer 7 presents a 2D network structure.The fluorescence test shows that the coordination polymers 6 and 7 are both positive to selectively identify Fe3+,CrO42-,Cr2O72-,MnO4-,nitrobenzene,and tetracycline hydrochloride.By exploring the mechanism of fluorescence quenching,it is found that the main reason for fluorescence quenching caused by the above substances is energy competition absorption or electron transfer.The final experimental results showed that coordination polymers 6 and 7 have potential applications in detecting anions and cations,organic solvents,and antibiotics.3.By using the main ligands H2L1,H2L2,combined with the nitrogen-containing auxiliary ligand bimb[1,4-bis((1H-imidazol-1-yl)methyl)benzene],1,10-phen(1,10-O-phenanthroline),dip[1,1'-(oxybis(4,1-phenylene))bis(1H-imidazole)]and cadmium nitrate tetrahydrate to synthesize three coordination polymers under hydrothermal conditions:[Cd(L2)(bimb)0.5]n(8),[Cd1(L2)(1,10-phen)·Cd2(L2)(1,10-phen)·H2O]n(9),[Cd2(L2)2(dip)2·H2O]n(10).The coordination polymer 8 has a 1D chain structure,and the coordination polymers 9 and 10 have a 2D layered structure.Fluorescence tests show that coordination polymers 9 and 10 can be used as fluorescent probes to selectively identify Fe3+,CrO42-,Cr2O72-,MnO4-,nitrobenzene,and tetracycline hydrochloride. |
PDF Full Text Request