期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
卷 165, 期 -, 页码 147-156出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotobiol.2016.10.027
关键词
Schiff base; Binary Cu(II) complex; Antimicrobial activity; DNA interaction
资金
- CSIR [19-06/2011(i)EU-IV]
- DST-FIST
- DST-PURSE [A-44/PURSE/Coord/2011]
- DST-SERB [SB/EMEQ-141/2014]
- UGC-UPE, New Delhi, India [002/OU/UPE/FAR/CO/2013]
Four novel Schiff base ligands, L-1 (1-((E)-(6-(trifluoromethoxy)benzo[d]thiazol-2-ylimino)methyl)naphthalen2-ol, C19H11F3N2O2S), L-2 (3-((E)-(6-(trifluoromethoxy)benzo[d]thiazol-2-ylimino)methyl)benzene-1,2-diol, C15H9F3N2O3S), L-3 (2-((E)-(6-(trifluoromethoxy)benzo[d]thiazol-2-ylimino)methyl)-5-methoxyphenol, C16H11F3N2O3S) and L-4 (2-((E)-(6-(trifluoromethoxy)benzo[d]thiazol-2-ylimino)methyl)-4-bromophenol, C15H8BrF3N2O2S) and their binary copper(II) complexes 1 [Cu(L-1)(2)], 2 [Cu(L-2)(2)], 3 [Cu(L-3)(2)] and 4 [Cu(L4)2] have been synthesized and characterized by elemental analysis, H-1 NMR, C-13 NMR, ESI mass, FT-IR, ESR, UV-Visible, magnetic susceptibility, TGA, SEM and powder XRD studies. Based on spectral and analytical data, a square planar geometry is assigned for all Cu(II) complexes. The ligands and their Cu(II) complexes have been screened for antimicrobial activity against bacterial species E. coli, P. aeruginosa, B. amyloliquefaciens and S. aureus and fungal species S. rolfsii and M. phaseolina and it is observed that all Cu(II) complexes are more potent than corresponding ligands. DNA binding (UV absorption, fluorescence and viscosity titrations) and cleavage (oxidative and photo cleavage) studies of Cu(II) complexes have also been investigated against calf thymus DNA (CT-DNA) and supercoiled pBR322 DNA respectively. From the experimental results, it is found that the complexes bound effectively to CT-DNA through an intercalative mode and also cleaved pBR322 DNA in an efficient manner. The DNA binding and cleavage affinities of newly synthesized Cu(II) complexes are in the order of 2 > 1 > 3 > 4. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据