Synthesis, characterization and investigation of antioxidant activity of cobalt–quercetin complex

This article describes a novel synthesis of cobalt and quercetin·2H 2O complex in methanol, characterized by using elemental analysis, UV–visible, 1H NMR, TGA, DSC and IR spectrometric techniques. The formation of complex is deduced from the UV–visible spectra which shows that the successive formati...

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Bibliographic Details
Published inJournal of molecular structure Vol. 892; no. 1; pp. 39 - 46
Main Authors Birjees Bukhari, S., Memon, Shahabuddin, Mahroof Tahir, M., Bhanger, M.I.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.12.2008
Subjects
Antioxidant
Antioxidants
Co(II) complexation
Flavonoids
Free radicals
Ligands
Methyl alcohol
Quercetin
Scavenging
Spectra
Spectroscopy
Stoichiometry
Synthesis
Stoichiometry
Spectroscopy
Flavonoids
Co(II) complexation
Antioxidant
Quercetin
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Summary:This article describes a novel synthesis of cobalt and quercetin·2H 2O complex in methanol, characterized by using elemental analysis, UV–visible, 1H NMR, TGA, DSC and IR spectrometric techniques. The formation of complex is deduced from the UV–visible spectra which shows that the successive formation of cobalt–quercetin complex occurs in a ratio of 2:1 (metal/ligand) stoichiometrically. The antioxidant activity of the complex was evaluated by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method. In this work, we have shown that the metal complexed flavonoids are much more effective free radical scavengers than the free flavonoids.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-2860
1872-8014
DOI:10.1016/j.molstruc.2008.04.050