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Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
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Functionalized gold magic clusters: Au25(SPhNH2)17.

Christophe Lavenn1, Florian Albrieux, Gérard Bergeret

  • 1Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON), UMR 5256 CNRS-Université Lyon 1, 2 avenue Albert Einstein, 69626 Villeurbanne, France.

Nanoscale
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Summary

Researchers synthesized new gold nanoclusters (Au(25)) using 4-aminothiophenolate ligands. These stable gold nanoclusters were produced with a high yield, showing potential for advanced material applications.

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Area of Science:

  • * Inorganic Chemistry
  • * Nanomaterials Science
  • * Surface Chemistry

Background:

  • * Gold nanoclusters (AuNCs) are gaining attention for their unique optical and catalytic properties.
  • * Ligand stabilization is crucial for controlling the structure and stability of AuNCs.
  • * Heterotopic ligands offer versatile coordination possibilities for metal nanoclusters.

Purpose of the Study:

  • * To synthesize and characterize novel gold nanoclusters stabilized by 4-aminothiophenolate ligands.
  • * To investigate the structural and electronic properties of the resulting Au(25) nanoclusters.
  • * To explore the potential of these nanoclusters in various applications.

Main Methods:

  • * Synthesis of gold nanoclusters using 4-aminothiophenolate ligands.
  • * Isolation and purification of the nanoclusters.
  • * Characterization using Electrospray Ionization Mass Spectrometry (ESI-MS) to determine the formula and structure.

Main Results:

  • * Successful isolation of new Au(25) nanoclusters with a yield of approximately 70%.
  • * Determination of the nanocluster formula as Au(25)(SPhNH(2))(17) via ESI-MS.
  • * Identification of amine or DMF molecules occupying the 18th position, completing the electronic shell.

Conclusions:

  • * Novel Au(25) nanoclusters stabilized by 4-aminothiophenolate ligands have been successfully synthesized.
  • * The electronic shell closure, achieved by additional molecules, is key to the stability of these nanoclusters.
  • * This work provides a new platform for designing stable and functional gold nanoclusters.