Journal
INTERNATIONAL JOURNAL OF SPECTROSCOPY
Volume -, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2018/8759372
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Funding
- University Grant Commission, New Delhi under the Rajiv Gandhi National Fellowship Scheme
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A bidentate (N- and O-) imine-based ligand (L-1) and its metal complexes of types [Cu-II(L-1)(2)] (C-1), [Cu-II(L-1)(Phen)] (C-2), [Co-III(L-1)(2)] (C-3), and [Co-III(L-1)(Phen)] (C-4) (L-1 = 2-((E)-(6-fluorobenzo[d]thiazol-2-ylimino)methyl)-4-chlorophenol and phen = 1,10-phenanthroline) were synthesized as potential chemotherapeutic drug candidates. The prepared complexes were structurally characterized by spectral techniques (NMR, FT-IR, LC-MS, EPR, and electronic absorption), thermogravimetric analysis (TGA/DTA), magnetic moment, and CHNO elemental analysis. Spectroscopic studies suggested the distorted octahedral structure for all complexes. In vitro bioassay studies include binding and nuclease activities of the ligand and its complexes with target calf thymus-(CT-) DNA were carried out by employing UV-Vis, fluorescence spectroscopy, viscosity, and gel electrophoresis techniques. The extent of binding propensity was determined quantitatively by K-b and K-sv values which revealed a higher binding affinity for C-2 and C-4 as compared to C-1 and C-3. In addition, the scavenging superoxide anion free radical (O center dot-2) activity of metal complexes was determined by nitroblue tetrazolium (NBT) light reduction assay. Molecular docking studies with DNA and SOD enzyme were also carried out on these compounds. The antimicrobial study has shown that all the compounds are potential antibacterial agents against Gram-negative bacterial strains and better antifungal agents with respect to standard drugs used.
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