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<p>In this study, we focus on the synthesis of a novel water-soluble inorganic complex designated as [Cu(pzo)<sub>2</sub>(tu)<sub>2</sub>] (referred to as Cu complex), where pzo represents pyrazinoic acid and tu denotes thiourea, utilizing ultrasonic irradiation. The molecular architecture of the Cu complex was primarily analyzed through single-crystal X-ray diffraction, revealing a monoclinic crystal system. Additional characterization techniques employed include elemental analysis, energy-dispersive X-ray spectroscopy (EDX/EDS), Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis, and differential thermal analysis. Cu complex was then immobilized on magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles, resulting in the composite Cu-complex@Fe<sub>3</sub>O<sub>4</sub> (catalyst <b>1</b>), characterized using FT-IR, XRD, SEM, EDS, and ICP-OES methods. Catalyst <b>1</b> was utilized as a novel heterogeneous catalyst for the oxidation of sulfides and the oxidative coupling of thiols. Under optimal reaction conditions, catalyst <b>1</b> demonstrated significant catalytic activity and could be easily recovered with an external magnet, allowing for multiple reuse cycles without a notable decrease in catalytic performance.</p>

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Single-Crystal Structure Feature of a Novel Water-Soluble Cu(II) Complex as a Heterogeneous Catalyst for Oxidation Reactions

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • Zohreh Razmara,
  • Mohd Mustaqim Rosli,
  • Ibrahim Abdul Razak

摘要

In this study, we focus on the synthesis of a novel water-soluble inorganic complex designated as [Cu(pzo)2(tu)2] (referred to as Cu complex), where pzo represents pyrazinoic acid and tu denotes thiourea, utilizing ultrasonic irradiation. The molecular architecture of the Cu complex was primarily analyzed through single-crystal X-ray diffraction, revealing a monoclinic crystal system. Additional characterization techniques employed include elemental analysis, energy-dispersive X-ray spectroscopy (EDX/EDS), Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis, and differential thermal analysis. Cu complex was then immobilized on magnetic Fe3O4 nanoparticles, resulting in the composite Cu-complex@Fe3O4 (catalyst 1), characterized using FT-IR, XRD, SEM, EDS, and ICP-OES methods. Catalyst 1 was utilized as a novel heterogeneous catalyst for the oxidation of sulfides and the oxidative coupling of thiols. Under optimal reaction conditions, catalyst 1 demonstrated significant catalytic activity and could be easily recovered with an external magnet, allowing for multiple reuse cycles without a notable decrease in catalytic performance.