期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
卷 160, 期 -, 页码 163-171出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotobiol.2016.03.030
关键词
Curcumin; Schiff base; Auxiliary ligand; Catalytic potential; Anthelminthic activity
资金
- University Grants Commission, New Delhi
Schiff base ligand, (L), derived from condensation reaction of 1,7-bis-(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione, (curcumin), with pyridine-3-carboxamide, (nicotinamide), and its complexes of Co(II), Ni(II) and Cu(II) ions, containing 1,10-phenanthroline as auxiliary ligand were synthesized and characterized by various physico-chemical techniques. From the micro analytical data, the stoichiometry of the complexes 1:1 (metal: ligand) was ascertained. The Co(II) and Cu(II) forms octahedral complexes, while the geometric structure around Ni(II) atom can be described as square planar. The catalytic potential of the metal complexes have been evaluated by recording the rate of decomposition of hydrogen peroxide. The results reveal that the percent decomposition of H(2)O(2)increases with time and the highest value (50.50%) was recorded for Co(II) complex. The ligand and its complexes were also screened for their in vitro antibacterial activity against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Streptococcus pyogenes and Pseudomonas aeruginosa. The relative order of antibacterial activity against S. Pyogenes, S. aureus and E. coli is Cu(II) > Ni(II) > Co(II) > (L); while with P. aeruginosa, K. pneumoniae the order of activity is Cu(II)> Co(II)> Ni(II)> (L). The anthelmintic screening was performed using Pheretima posthuma. The order of anthelmintic activity of ligand and its complexes is (Phen)CuLCl2 > [ (Phen)CoLCl2] > [(Phen)NiL]Cl-2 > (L). (C) 2016 Elsevier B.V. All rights reserved.
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