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Issue 40, 2015
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One-pot synthesis of Au144(SCH2Ph)60 nanoclusters and their catalytic application

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Abstract

Here, we report the one-pot synthesis of atomically precise gold nanoclusters – Au144(SCH2Ph)60 with moderate efficiency (ca. 20% yield based on HAuCl4). The Au144(SCH2Ph)60 nanoclusters are obtained from the polydispersed Aun(SG)m nanoclusters in the presence of excess H–SCH2Ph ligands via a combination of “ligand-exchange” and “size-focusing” processes. The as-obtained Au144(SCH2Ph)60 nanoclusters are well determined by UV-vis spectroscopy and electrospray ionization (ESI) mass spectrometry, and in conjunction with matrix-assisted laser desorption ionization (MALDI) mass spectrometry and thermal gravimetric analysis (TGA). The purity of the Au144(SCH2Ph)60 nanoclusters is further characterized by size exclusion chromatography (SEC) and elemental analysis. The powder X-ray diffraction (PXRD) analysis implies that the Au144(SCH2Ph)60 nanoclusters do not adopt the face-centered cubic (fcc) structure, as the diffraction angle (2θ = 50.5°) is only observed in the Au144(SCH2Ph)60 nanoclusters. Further, the Au144(SCH2Ph)60/TiO2 catalyst exhibits excellent catalytic performance (92% conversion of methyl phenyl sulfide with 99% selectivity for sulfoxide) in the selective sulfoxidation; size-dependence of the gold nanocluster catalyst is observed in the catalytic reactions: Au144(SCH2Ph)60 > Au99(SPh)42 > Au38(SCH2CH2Ph)24 > Au25(SCH2CH2Ph)18.

Graphical abstract: One-pot synthesis of Au144(SCH2Ph)60 nanoclusters and their catalytic application

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Publication details

The article was received on 26 Jul 2015, accepted on 23 Aug 2015 and first published on 25 Aug 2015


Article type: Paper
DOI: 10.1039/C5TA05747G
Citation: J. Mater. Chem. A, 2015,3, 20167-20173
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    One-pot synthesis of Au144(SCH2Ph)60 nanoclusters and their catalytic application

    C. Liu, C. Yan, J. Lin, C. Yu, J. Huang and G. Li, J. Mater. Chem. A, 2015, 3, 20167
    DOI: 10.1039/C5TA05747G

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