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<p>Water soluble metal-tetrakis (<i>p</i>-sulfonatephenyl) porphyrin were studied for catalytic degradation of ciprofloxacin using H<sub>2</sub>O<sub>2</sub>, K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>, and KHSO<sub>5</sub> as oxidant in aqueous medium. Cobalt (III)-tetrakis (<i>p</i>-sulfonatephenyl) porphyrin (CoTPPS), manganese (III) –tetrakis (<i>p</i>-sulfonatephenyl)porphyrin (MnTPPS), and iron(III)-tetrakis (<i>p</i>-sulfonatephenyl)porphyrin were evaluated (FeTPPS). CoTPPS showed the highest catalytic activity for catalytic degradation of fluoroquinolones and sulfamethoxazole. The degradation efficiency of ciprofloxacin reached 95% within 20&#xa0;min at room temperature. The obtained products were characterized using mass spectrometry, leading to the proposal of a catalytic degradation pathway for ciprofloxacin mediated by CoTPPS. Additionally, a reaction mechanism for the system was postulated and subsequently corroborated through density functional theory (DFT) calculation. The higher stability and the formation of [(Porp) Co<sup>Ⅳ</sup> = O]<sup>+•</sup> played the key roles for the higher catalytic activity of CoTPPS. Co porphyrin-catalyzed ciprofloxacin degradation is a promising strategy to degrade fluoroquinolones.</p>

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Biomimetic catalytic degradation of fluoroquinolone antibiotics by water-soluble metalloporphyrins

  • 期刊论文

  • 发表日期：

    2026年4月16日

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  • Denan Li,
  • Wataru Ueda,
  • Qianqian Zhu,
  • Yanshuo Li,
  • Zhenxin Zhang

摘要

Water soluble metal-tetrakis (p-sulfonatephenyl) porphyrin were studied for catalytic degradation of ciprofloxacin using H2O2, K2S2O8, and KHSO5 as oxidant in aqueous medium. Cobalt (III)-tetrakis (p-sulfonatephenyl) porphyrin (CoTPPS), manganese (III) –tetrakis (p-sulfonatephenyl)porphyrin (MnTPPS), and iron(III)-tetrakis (p-sulfonatephenyl)porphyrin were evaluated (FeTPPS). CoTPPS showed the highest catalytic activity for catalytic degradation of fluoroquinolones and sulfamethoxazole. The degradation efficiency of ciprofloxacin reached 95% within 20 min at room temperature. The obtained products were characterized using mass spectrometry, leading to the proposal of a catalytic degradation pathway for ciprofloxacin mediated by CoTPPS. Additionally, a reaction mechanism for the system was postulated and subsequently corroborated through density functional theory (DFT) calculation. The higher stability and the formation of [(Porp) CoⅣ = O]+• played the key roles for the higher catalytic activity of CoTPPS. Co porphyrin-catalyzed ciprofloxacin degradation is a promising strategy to degrade fluoroquinolones.