新型吡唑羧酸配合物的合成、结构及其性能分析.docx

草芽孢杆菌、白色念珠菌、大肠杆菌和绿脓杆菌的抑菌活性。结果表明,所有化
合物对所尝试细菌均有一定的抑制作用,除锌配合物外,其他配合物对所试细菌的抑制作用强于相应的配体。
关键词:吡唑羧酸,过渡金属配合物,晶体结构,抑菌活性
ABSTRACT
anic coordination polymers have attracted considerable attention not only because of their fascinating structural diversities, but also due to their potential application in ic, luminescent, adsorption, biological activity, etc. Recently, the anic coordination polymers based on pyrazole ligands is one of the most attractive topics of researches.
In this paper, four kinds of pyrazole carboxylic acid ligands were synthesized, meanwhile twenty-two new transition plexes were prepared via hydro/ solvothermal techiques and structurally characterized by elemental analysis, infrared spectra and single crystal X-ray diffraction. In addition, the antibacterial activities of free ligands and plexes were studied.
Three new transition plexes, [Ni(3PZA)2(2,2′-bipy)]·3H2O (1), [Co(3PZA)2(4,4′-bipy)]·5H2O (2), [Ni(3PZA)2(4,4′-bipy)] (3), based on 5-phenyl-1H- pyrazole-3-carboxylic acid (3PZA) ligand were synthesized. Complex 1 exhibits monomeric structure; complexes 2 and 3 display 1D chain structures. Five new transition plexes, [Ni(4PZA)2(H2O)2] (4), [Ni(4PZA)2(4PZ)2] (5), [Zn2(4PZA)3] (6), [Ni2(4PZA)4(4,4′-bipy)(H2O)2]·4H2O (7), [Co(4PZA)2(4,4′-bipy)]
(8), based on 3-phenyl-1H-pyrazole-4-carboxylic acid (4PZA) ligand were prepared.
Complexes 4 and 5 were formed by one-pot reaction, and exhibit 1D chain and 2D layer structures, respectively; complex 6 holds a 3D anic framework with double-stranded helical chains induced by coordination bonds; complexes 7 and 8 possess different 3D anic frameworks with 1D channels. Hydrogen bonding and π-π stacking interactions plexes 1-8 into 3D works.
Four new transition plexes, [Cu(CPZA)2(H2O)] (9), [Cu(CPZA)2(4,4′- bipy)] (10), [Ni(CPZA)2(4,4′-bipy)(H2O)] (11), [Co(CPZA)2(4,4′-bipy)(H2O)] (12),
based on 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-carboxylic acid (CPZA) ligand were synthesized. Complex 9 exhibits monom