Synthesis, characterization and antioxidant activity copper-quercetin complex

来自 dx.doi.org

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阅读量：

128

作者：

SB Bukhari，S Memon，M Mahroof-Tahir，MI Bhanger

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摘要：

Quercetin (3,3′,4′,5,7-pentahydroxyflavone) one of the most abundant dietary flavonoids, has been investigated in the presence of Cu(II) in methanol. The spectroscopic studies (UV–vis, 1H NMR and IR) were useful to assess the relevant interaction of Quercetin with Cu(II) ions, the chelation sites and dependence of the complex structure from the metal/ligand ratio. A 1:2 (L:M) complex was indicated by Job's method of continuous variation, which was applied to ascertain the stoichiometric composition of the complex. The antioxidant activities of the compounds were evaluated by using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method. The complexed flavonoid was much more effective free radical scavengers than the free flavonoids.

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关键词：

Antioxidant Flavonoids Quercetin Stoichiometry Cu(II)–quercetin complex Spectroscopy

DOI：

10.1016/j.saa.2008.07.030

被引量：

317

年份：

2009