Syntheses,Structures,Fluorescent And Electrochemical Analysis Properties Of Complexes Based On Dpq-bmpbdca-bptdca

In this thesis,three N-donor ligands[dipyrazino[2,3-f:2′3′-h]quinoxaline（dpq）,N,N′-bis（4-methylenepyridin-4-yl）-1,4-benzenedicarboxamide（bmpbdca）andN,N′-bis（pyridine-3-yl）thiophenyl-2,5-dicarboxamide(bptdca],three polycarboxylates[5-（4’-carboxylphenoxy）isophthalic acid（H₃cpoip）,1,4-cyclohexanedicarboxylic acid（1,4-H₂chda）and 5-methylisophthalic acid（H₂mip）],have been used as ligands to react with transition metal atoms under hydrothermal conditions.Six new complexes have been synthesized and characterized by IR,elemental analysis,Thermogravimetric analysis（TG）,PXRD and single-crystal X-ray diffraction.The fluorescent and electrochemical analysis properties of some complexes have been studied.1.Using chelating N-donor ligand（dpq）as main ligand and H₃cpoip as co-ligand to assemble with Cu²⁺,Co²⁺,Ni²⁺and Zn²⁺,four transition metals complexes with different structural characters have been hydrothermally synthesized and structurally characterized（1-4）.The influence of the metal ions on the structures of complexes has been investigated.Single crystal X-ray diffraction analysis reveals that complex 1 is a 0 dimensional structure and Hcpoip shows mono-dentate coordinated mode.Complex 2 shows one dimensional structure based on single metallicc node and Hcpoip shows tri-dentate coordinated mode.Complex 3 is a three dimensional structure based on bimetallicc node and Hcpoip shows four-dentate coordinated mode.Complex 4 is a one dimensional structure which is similar with 2.In the above complexes,dpq show chelating coordinated mode.Cu²⁺,Co²⁺,Ni²⁺and Zn²⁺show 5,6,6 and 5 coordianted modes.Different metal ions led to the differecences of coordinatied features of cpoip and the title complexes.[Cu（Hcpoip）（dpq）（H₂O）₂]（1）[Co（Hcpoip）（dpq）（H₂O）]·H₂O（2）[Ni₃（cpiop）₂（dpq）₃（H₂O）₄]·4H₂O（3）[Zn（HL）（dpq）（H₂O）]·H₂O（4）The electrochemical analyses for H2O2,NO2-and BO3-of 1-3,fluorescent sensingbehaviors for metal ions of 4 have been systematically investigated.2.Using N,N′-bis（4-methylenepyridin-4-yl）-1,4-benzenedicarboxamide（bmpbdca）and N,N′-bis（pyridine-3-yl）thiophenyl-2,5-dicarboxamide（bptdca）as N-donor ligands,1,4-cyclohexanedicarboxylic acid（1,4-H₂chda）and 5-methylisophthalic acid（H₂mip）as co-ligands,to assemble with Ni²⁺and Cu²⁺,two transition metals complexes with different structural characters have been hydrothermally synthesized and structurally characterized（5-6）.Complex 5 is a（4,4）-connected two dimensional network based on single metal nodes and finally form a three dimensional supramolecular framework derived from interpenetrated two dimensional networks.Complex 6 shows two dimensional network based on bimetal nodes.[Ni（bmpbdca）（chda）（H₂O）₂]·2H₂O（5）[Cu（bptdca）（mip）]·3H₂O（6）The electrochemical analyses for H₂O₂,NO₂^-and BO₃^-of 5-6,fluorescent sensing behaviors for metal ions and organic solvents of 4 have been investigated.