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<p>The reaction of&#xa0;HAuCl<sub>4</sub><sup>.</sup>nH<sub>2</sub>O with organoaluminum compounds (HAlBu<sup>i</sup><sub>2</sub> or AlR<sub>3,</sub> R = Me, Et, Bu<sup>i</sup>) in organic solvents, followed by hydrolysis in the presence of a tertiary thiol (5-methylundecane-5-thiol), afforded gold nanoparticles (AuNPs). Particle sizes and size distributions depended largely on the structure of the original organoaluminum reagent and the nature of the solvent. The smallest particle sizes ranging from 2 to 20&#xa0;nm were observed when reducing&#xa0;HAuCl<sub>4</sub> with HAlBu<sup>i</sup><sub>2</sub>. Nanoparticles have been characterized by the means of scanning transmission electron microscopy, photon cross-correlation spectroscopy, X-ray photoelectron spectroscopy, and UV–Vis spectroscopy. The proposed method may be further utilized for the deposition of metal nanoparticles onto solid supports for applications in catalysis and other fields.</p>

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Synthesis of Au nanoparticles by the reaction of HAuCl4·nH2O with organoaluminum compounds

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Lyudmila V. Parfenova,
  • Almira Kh. Bikmeeva,
  • Pavel V. Kovyazin,
  • Eldar R. Palatov,
  • Leonard M. Khalilov,
  • Nina M. Ivanova,
  • Semen N. Sergeev

摘要

The reaction of HAuCl4.nH2O with organoaluminum compounds (HAlBui2 or AlR3, R = Me, Et, Bui) in organic solvents, followed by hydrolysis in the presence of a tertiary thiol (5-methylundecane-5-thiol), afforded gold nanoparticles (AuNPs). Particle sizes and size distributions depended largely on the structure of the original organoaluminum reagent and the nature of the solvent. The smallest particle sizes ranging from 2 to 20 nm were observed when reducing HAuCl4 with HAlBui2. Nanoparticles have been characterized by the means of scanning transmission electron microscopy, photon cross-correlation spectroscopy, X-ray photoelectron spectroscopy, and UV–Vis spectroscopy. The proposed method may be further utilized for the deposition of metal nanoparticles onto solid supports for applications in catalysis and other fields.