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<p>Ultrasmall rhenium nanoparticles were prepared by a reduction of rhenium trichloride with sodium borohydride in water capped with the tripeptide glutathione. The particles were approximately spherical with an average diameter of 1.5 nm and had a high degree of internal crystallinity as shown by transmission electron microscopy and X-ray powder diffraction. They were well dispersible in water as differential centrifugal sedimentation (DCS), <sup>1</sup>H-NMR DOSY spectroscopy (nuclear magnetic resonance–diffusion-enhanced spectroscopy), and small-angle X-ray scattering (SAXS) showed. <sup>1</sup>H-NMR spectroscopy and <sup>13</sup>C-NMR spectroscopy confirmed that glutathione was attached to the nanoparticle via the terminal thiol group of cysteine. Upon heating in oxygen, the nanoparticles were converted into dirhenium heptoxide which evaporated above 360 °C.</p>

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Synthesis and characterization of ultrasmall rhenium nanoparticles (1.5 nm)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月13日

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  • Niklas Kost,
  • Oleg Prymak,
  • Kateryna Loza,
  • Marc Heggen,
  • Cristiano L. P. Oliveira,
  • Christine Beuck,
  • Peter Bayer,
  • Matthias Epple

摘要

Ultrasmall rhenium nanoparticles were prepared by a reduction of rhenium trichloride with sodium borohydride in water capped with the tripeptide glutathione. The particles were approximately spherical with an average diameter of 1.5 nm and had a high degree of internal crystallinity as shown by transmission electron microscopy and X-ray powder diffraction. They were well dispersible in water as differential centrifugal sedimentation (DCS), 1H-NMR DOSY spectroscopy (nuclear magnetic resonance–diffusion-enhanced spectroscopy), and small-angle X-ray scattering (SAXS) showed. 1H-NMR spectroscopy and 13C-NMR spectroscopy confirmed that glutathione was attached to the nanoparticle via the terminal thiol group of cysteine. Upon heating in oxygen, the nanoparticles were converted into dirhenium heptoxide which evaporated above 360 °C.