Water-Soluble Gold Nanoparticles: From Catalytic Selective Nitroarene Reduction in Water to Refractive Index Sensing

Wusheng Guo, Roser Pleixats, Alexandr Shafir

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

Abstract

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Water-soluble gold nanoparticles (Au NPs) stabilized by a nitrogen-rich poly(ethylene glycol) (PEG)-tagged substrate have been prepared by reduction of HAuCl4 with NaBH4 in water at room temperature. The morphology and size of the nanoparticles can be controlled by simply varying the gold/stabilizer ratio. The nanoparticles have been fully characterized by TEM, high-resolution (HR) TEM, electron diffraction (ED), energy-dispersive X-ray spectroscopy (EDS), UV/Vis, powder XRD, and elemental analysis. The material is efficient as a recyclable catalyst for the selective reduction of nitroarenes with NaBH4 to yield the corresponding anilines in water at room temperature. Furthermore, the potential ability of the Au NPs as a refractive index sensor owing to their localized surface plasmon resonance (LSPR) effect has also been assessed.
Original languageEnglish
Pages (from-to)2437-2443
JournalChemistry - An Asian Journal
Volume10
Issue number11
DOIs
Publication statusPublished - 1 Nov 2015

Keywords

  • arenes
  • gold
  • nanoparticles
  • reduction
  • sensors

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