| The modern world is plagued by a severe issue of water contamination due to Fe3+.Therefore,quantitative analysis of Fe3+concentration in water is necessary to monitor water quality.In recent years,coordination polymers（CPs）have been proven to be a class of excellent candidates for luminescent sensors.In chapter 2,three CPs,namely,{[Zn3（L1）2（H2O）3]·0.5H2O}n（1）,{[Zn3（L1）2（dib）2.5（H2O）]·0.5H2O}n（2）,and{[Zn2（L2）（OH）（H2O）]·0.5H2O}n（3）,have been synthesized under hydrothermal conditions（H3L1=5-（（2-carboxyphenoxy）methyl）benzene-1,3-dioicacid,H3L2=5-（（3-carboxyphenoxy）methyl）benzene-1,3-dioicacid,and dib=1,4-di（1H-imidazol-1-yl）butane）.Compound 1 shows a novel（3,12）-connected 3D framework based on a hexanuclear Zn（II）cluster with the point symbol of{43}4{420·628·818}.Compound 2 reveals a（3,3,4,4）-connected3D framework with the{6·92}2{64·8·10}{64·8·9}{9·11·12}topology.Compound 3 exhibits a（3,6）-connected 2D layer based on a tetranuclear Zn（II）cluster with the{43}2{46·66·83}topology.The luminescence responses of compounds 1-3 towards Fe3+were investigated in aqueous solutions.The results show that compounds 1-3 are good luminescent sensors for detection of Fe3+.The low limits of detection（LOD）for Fe3+are 4.07,1.14,and 40.70μM,respectively.In chapter 3,five new CPs,namely{Pb1.5（L3）}（5）,{Pb3（L3）2（2,2-bpy）·2.5H2O}（6）,{[Pb（HL3）（phen）]·H2O}（7）,{Ag2（HL3）}（8）and{Ag（H2L3）（phen）}（9）,have been constructed by using 1-（4-carboxybenzyl）-1H-pyrazole-3,5-dicarboxylic acid（H3L3）as an organic ligand.The structures and properties of compounds 5-9 have been characterized in detail via single-crystal X-ray diffraction,powder X-ray diffraction,IR spectroscopy,element analyses and thermogravimetric analyses.Compound 5 reveals a three-dimensional（3D）（4,6,7）-connected framework with the point symbol of{410·65}{46}2{48·613}2.Compound 6 exhibits a novel（3,4,7）-connected 3D framework based on a trinuclear Pb（II）cluster with point symbol{43}2{45·6}{48·69·84}.Compound 7 is a 1D chain which is further assembled into a 3D supramolecular framework by hydrogen-bonds.Compound 8 shows a（3,6）-connected 3D structure based on a tetranuclear Ag（I）cluster with{4·62}2{42·610·83}topology.Compound 9 is a 0D structure,and can be further expanded into a 3D supramolecular network by various weak interactions.The solid-state photoluminescent spectra have been measured at room temperature.The results show that compounds 5-9 exhibit strong luminescent emission in the visible region,and can be tunable by varying excitation wavelengths.In chapter 4,{[Mn（HL3）（2,2’-bpy）H2O]}n（9）,{[Mn（HL3）（phen）H2O]·1.5H2O}2（10）,{[Mn（HL3）（4,4’-bpy）]}n（11）,{[Co1.5（L3）3H2O]·6H2O}n（12）,[Co（H2L3）2（H2O）2]（13）,{[Co（HL3）（2,2’-bpy）H2O]}n（14）and{[Co（HL3）（phen）H2O]·H2O}2（15）,have been synthesized under hydrothermal conditions.It is interesting that compounds 10,13 and 15 are all0-dimensional structures,9 and 14 are 1-dimensional chain-like structures of the same configuration,11 is a 2-dimensional planar structure and 12 is a 3-dimensional stereostructure. |
