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Abstract <p>We report an environmentally friendly synthesis of titanium dioxide nanoparticles (TiO<sub>2</sub> NPs) using titanium oxyhydroxide [TiO(OH)<sub>2</sub>] and the fungus strain <i>Aspergillus niger</i> isolated from a pond ecosystem. The mycogenic TiO<sub>2</sub> NPs were characterized using FT-IR, XRD, FE-SEM, and TEM techniques. The <i>Aspergillus niger</i>-mediated TiO<sub>2</sub> NPs functioned as an efficient, eco-friendly, and recyclable catalyst for the one-pot, three-component synthesis of 2-amino-4<i>H</i>-1-benzopyrans in aqueous medium at room temperature. A library of structurally diverse 2-amino-4<i>H</i>-1-benzopyran derivatives was thus synthesized and screened for antimicrobial activity against two bacterial strains (<i>Escherichia coli</i> and <i>Bacillus subtilis</i>) and two fungal strains (<i>Aspergillus niger</i> and <i>Saccharomyces cerevisiae</i>). Several compounds exhibited good to excellent antimicrobial activity. The developed protocol offers several notable advantages, including simple catalyst preparation, green reaction conditions, catalyst reusability, high yields, short reaction times, and easy purification.</p>

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Mycogenic TiO2 Nanoparticles Fabricated by Aspergillus niger: Room Temperature Green Synthesis of Bioactive 2-Amino-4H-1-benzopyrans

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • P. Mane,
  • A. Survase,
  • B. Shinde,
  • A. Burungale

摘要

Abstract

We report an environmentally friendly synthesis of titanium dioxide nanoparticles (TiO2 NPs) using titanium oxyhydroxide [TiO(OH)2] and the fungus strain Aspergillus niger isolated from a pond ecosystem. The mycogenic TiO2 NPs were characterized using FT-IR, XRD, FE-SEM, and TEM techniques. The Aspergillus niger-mediated TiO2 NPs functioned as an efficient, eco-friendly, and recyclable catalyst for the one-pot, three-component synthesis of 2-amino-4H-1-benzopyrans in aqueous medium at room temperature. A library of structurally diverse 2-amino-4H-1-benzopyran derivatives was thus synthesized and screened for antimicrobial activity against two bacterial strains (Escherichia coli and Bacillus subtilis) and two fungal strains (Aspergillus niger and Saccharomyces cerevisiae). Several compounds exhibited good to excellent antimicrobial activity. The developed protocol offers several notable advantages, including simple catalyst preparation, green reaction conditions, catalyst reusability, high yields, short reaction times, and easy purification.