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• W1609460147 abstract "The effect of metal complexation on the antimicrobial activity of 1,4-naphthoquinones was investigated. Nickel-, chromium-, iron-, copper-, and cobalt-containing metal chelates of 5-amino-8-hydroxy-1,4-naphtoquinone (2) and its acyl-derivatives (3-8) were synthesized and characterized, and their antimicrobial activity was evaluated. Data from infrared spectroscopy indicate that naphthoquinones coordinate through oxygen and nitrogen atoms for 2, and through oxygen atoms when ligands were acyl derivatives 3-8. Susceptibility tests for antimicrobial activity showed that 2 and its acyl derivatives were effective on inhibiting the growth of pathogenic bacteria such as Staphylococcus aureus, Streptococcus uberis and Bacillus cereus, but not Gram-negative bacteria. The metal complexation often caused decrease of biological activity. Nickel complex of 2 was the most effective against Gram-positive bacteria, showing MIC values ranging from 375 to 1400 mg/ml. Metal chelates may be useful tools for the understanding of the antimicrobial mechanism of 1,4-naphthoquinones on these bacteria." @default.
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• W1609460147 date "2004-06-01" @default.
• W1609460147 modified "2023-09-27" @default.
• W1609460147 title "Antimicrobial activity of 1,4-naphthoquinones by metal complexation" @default.
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• W1609460147 doi "https://doi.org/10.1590/s1516-93322004000200014" @default.
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