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Issue 47, 2016
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Characterisation, degradation and regeneration of luminescent Ag29 clusters in solution

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Abstract

Luminescent Ag clusters are prepared with lipoic acid (LA) as the ligand. Using a combination of mass spectrometry, optical spectroscopy and analytical ultracentrifugation, the clusters are found to be highly monodisperse with mass 5.6 kDa. We assign the chemical composition [Ag29(LA)12]3− to the clusters, where LA likely binds in a bidentate fashion. The Ag29 clusters show slow degradation, retaining their deep red emission for at least 18 months if stored in the dark. Purification or exposure to light results in faster degradation. No other cluster species are observed during the degradation process. Once degraded, the clusters could easily be regenerated using NaBH4, which is not usually observed for thiolate-capped Ag clusters.

Graphical abstract: Characterisation, degradation and regeneration of luminescent Ag29 clusters in solution

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Publication details

The article was received on 20 Jun 2016, accepted on 08 Nov 2016 and first published on 14 Nov 2016


Article type: Paper
DOI: 10.1039/C6NR04958C
Citation: Nanoscale, 2016,8, 19901-19909
  • Open access: Creative Commons BY-NC license
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    Characterisation, degradation and regeneration of luminescent Ag29 clusters in solution

    M. van der Linden, A. Barendregt, A. J. van Bunningen, P. T. K. Chin, D. Thies-Weesie, F. M. F. de Groot and A. Meijerink, Nanoscale, 2016, 8, 19901
    DOI: 10.1039/C6NR04958C

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