Synthesis and characterization of ultrasmall rhenium nanoparticles (1.5 nm)

IF 2.6 4区材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of Nanoparticle Research Pub Date : 2025-08-13 DOI:10.1007/s11051-025-06420-0

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

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Abstract

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.

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超小铼纳米颗粒（1.5 nm）的合成与表征

用硼氢化钠在三肽谷胱甘肽覆盖的水中还原三氯化铼，制备了超小铼纳米颗粒。透射电子显微镜和x射线粉末衍射显示，该颗粒近似球形，平均直径为1.5 nm，具有较高的内部结晶度。差速离心沉降（DCS）、1H-NMR DOSY谱（核磁共振扩散增强谱）和小角x射线散射（SAXS）显示，它们在水中具有良好的分散性。1H-NMR和13C-NMR证实谷胱甘肽通过半胱氨酸末端巯基附着在纳米颗粒上。在氧气中加热后，纳米颗粒转化为七氧化二氮，在360°C以上蒸发。

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来源期刊

Journal of Nanoparticle Research 工程技术-材料科学：综合

CiteScore

4.40

自引率

4.00%

发文量

198

审稿时长

3.9 months

期刊介绍： The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size. Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology. The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.