Shen H,
Wu Q,
Malola S,
Han Y.-Z,
Xu Z,
Qin R,
Tang X,
Chen Y.-B,
Teo BK,
Häkkinen H,
*,
Zheng N.
*
University of Jyväskylä, Finland; Xiamen University and Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, P. R. of China
N‑Heterocyclic Carbene-Stabilized Gold Nanoclusters with Organometallic Motifs for Promoting Catalysis.
J. Am. Chem. Soc. 2022;
144: 10844-10853
DOI:
10.1021/jacs.2c02669
Key words
gold catalysis - N-heterocyclic carbenes - hydroamination - phenylacetylenes - anilines
Significance
An N-heterocyclic-carbene-stabilized gold nanocluster [Au16(NHC-1)5(PA)3Br2]3+ (Au16 cluster) immobilized on carbon (Au16/XC-72) was prepared according to Equation 1. Au16/XC-72 catalyzed the hydroamination of arylacetylenes with anilines to give the corresponding ketimines in up to >99% NMR yield (eq. 2).
Comment
The Au16 cluster was characterized by means of XRD, 1H NMR, 13C NMR, HRESI-MS, UV/Vis, DPV, XANES, EXAFS, and IR analyses. Au16/XC-72 had similar XANES, EXAFS, and IR profiles to a Au16 cluster. The reaction of phenylacetylene with aniline catalyzed by 0.002 mol% of Au16/XC-72 proceeded with a high turnover number of 50,000.
