Studies On Fluorescence And Antibacterial Properties Of Novel Coordination Polymers Based On Aromatic Carboxylic Acid And N-containing Heterocyclic Ligands

Currently,the design and synthesis of novel metal-organic frameworks material with specific structures and functions has become leading basic research fields in chemistry,biology and materials science.Study of these topics provide an important platform to develop new functional materials,which have shown that their properties and applications are largely determined by the selection of appropriate organic ligands.In view of this principle,combining a large amount of literature reports with works of our group in the early stage,we have been successfully synthesized twenty-one different dimensions Zn（II）,complexes by three groups of isomeric organic ligands 3-（1H-pyrazol-4-yl）-5-（pyridin-2-yl）-1,2,4-triazole（H₂L₁）,3-（1H-pyrazol-4-yl）-5-（pyridin-3-yl）-1,2,4-triazole（H₂L₂）,3-（1H-pyra zol-4-yl）-5-（pyridin-4-yl）-1,2,4-triazol（H₂L₃）and series of ancillary ligands aromatic polycarboxylic acids under solvothermal and solvothermal condition.The main contents and results of this thesis are as following:1 nine new Cd（II）and Zn（II）coordination complexes,{[Cd（CH₃COO）（HL₁）]·4H₂O}_n（1）,{[Cd₂（bc）₂（L₁）]·H₂O}_n（2）,[Cd（ip）（H₂L₁）（H₂O）]_n（3）,{[Cd（pta）_0.5（HL₁）（H₂O）]·H₂O}_n（4）,{[Cd₂（tma）（HL₁）（H₂O）]·3H₂O}_n（5）,[Cd（pma）_0.5（H₂L₁）]_n（6）,{[Zn₂（Hph）₂（HL₁）₂]·2H₂O}_n（7）,[Zn（ip）（H₂L₁）（H₂O）]_n（8）,[Zn（pma）_0.5（H₂L₁）]_n（9）,were prepared under hydrothermal reactions based on H₂L₁ and series of ancillary ligands aromatic polycarboxylic acids.X-ray diffraction single crystal results showed that compounds（1）,（3）,（4）,（7）,（8）are one-dimensional chain structure;compounds（2）,（5）,（6）,（9）show two-dimensional layered structure.And they were characterized by infrared spectroscopy,thermogravimetric analysis,X-ray powder diffraction analysis and fluorescence spectroscopy.In this Minireview,the antibacterial test of complexes（1）,（2）,（3）and（6）shows the growth of Pseudomonas putida was inhibited.2 Seven new Cd（II）and Zn（II）coordination complexes,[Cd（ph）（H₂L₂）]_n（10）,{[Cd₂（Hip）₂（HL₂）（H₂O）₂]·H₂O}_n（11）,{[Cd（pta）_0.5（HL₂）（H₂O）₂]·H₂O}_n（12）,{[Cd（pma）_0.5（H₂L₂）]?H₂O}_n（13）,{Zn₄（ip）₂（HL₂）（L₂）（OH）（H₂O）?H₂O}_n（14）,{[Zn（pta）_0.5（HL₂）（H₂O）]·H₂O}_n（15）,{[Zn₂（tma）（HL₂）（H₂O）]·H₂O}_n（16）,were prepared under hydrothermal reactions based on H₂L₂ and series of ancillary ligands aromatic polycarboxylic acids.X-ray diffraction single crystal results showed that compounds（12）and（15）are one-dimensional chain structure;compounds（10）and（11）show two-dimensional layered structure;compounds（13）,（14）and（16）present three-dimensional networkstructure.Andtheywerecharacterizedbyinfraredspectroscopy,,thermogravimetric analysis,X-ray powder diffraction analysis and fluorescence spectroscopy.In this Minireview,the fluorescence of complexes（10）,（12）and（15）were further researched and found that they have good detection performance of Cu²⁺.At the same time,the antibacterial test of complexes（10）,（11）and（12）shows the growth of Pseudomonas putida was inhibited.3 Five new Cd（II）and Zn（II）coordination complexes,[Zn（bc）₂（H₂L₃）]_n（17）,{[Zn（Hph）（HL₃）]·2H₂O}_n（18）,{[Zn（ip）（HL₃）]·3H₂O}_n（19）,{[Zn₂（tma）（HL₃）（H₂O）₂]·4H₂O}_n（20）,{[Zn（pma）_0.5（H₂L₃）]?H₂O}_n（21）,were prepared under hydrothermal reactions based on H₂L₃ and series of ancillary ligands aromatic polycarboxylic acids.X-ray diffraction single crystal results showed that compounds（17）and（18）are one-dimensional chain structure;compounds（19）and（20）show two-dimensional layered structure;compounds（21）presents three-dimensional network structure.And they were characterized by infrared spectroscopy,,thermogravimetric analysis,X-ray powder diffraction analysis and fluorescence spectroscopy.In this Minireview,the fluorescence of complexes（17）and（20）was further researched and found that they have good detection performance of Cu²⁺.