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Quercetin as a precursor to synthesize a new nano copper (II) complex as a highly antibacterial ethanol oxidation catalyst

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Document pages: 9 pages

Abstract: Quercetin (3,3 , 4 , 5,7-pentahydroxyflavone) is a dietary flavonoid, which is widely distributed in medicinal plants, vegetables and fruits. Quercetin has the ability to combine with a variety of metal ions to improve its biological activity. In the past two decades, quercetin has attracted extensive attention because of its biological and pharmaceutical activities such as antioxidant, antibacterial and anticancer. In this study, quercetin and ethanolamine were used to synthesize Schiff base complexes, which were characterized by IR, 1H NMR and 13C NMR spectra. Schiff bases are used as ligands for the synthesis of novel nano copper (II) complexes. The products were characterized by FT-IR, FESEM and XRD. It is worth noting that the product shows significant catalytic activityty towards the oxidation of primary and secondary alcohols. The antibacterial activity of the final product was assessed against Staphylococcus aureus (Gram‐positive) and Escherichia coli (Gram‐negative) bacteria using an inhibition zone test. The synthesized nanoscale Cu (II) complex exhibited a strong antibacterial activity against both Gram-positive and Gram-negative bacteria.

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