The complexity of heterogeneous metal
catalysts makes it challenging
to gain insights into their catalytic mechanisms. Thus, there exists
a huge gap between heterogeneous catalysis and organometallic catalysis.
With the success in the preparation of highly robust atomically precise
metal nanocluster catalysts (i.e., [Au16(NHC-1)5(PA)3Br2]3+ and [Au17(NHC-1)4(PA)4Br4]+, where
NHC-1 is a bidentate NHC ligand, and PA is phenylacetylide) with surface
organometallic motifs anchored on the metallic core, we demonstrate
in this work how the metallic core works synergistically with the
surface organometallic motifs to enhance the catalysis. More importantly,
the discovery allows the development of highly stable and recyclable
heterogeneous metal catalysts to achieve efficient hydroamination
of alkynes with an extremely low catalyst dosage (0.002 mol %), helping
bridge the gap between heterogeneous and homogeneous metal catalysis.
The surface modification of metal nanocatalysts with organometallic
motifs provides a new design principle of metal catalysts with enhanced
catalysis.
Elucidating the coordination structures and assembling modes of atomically precise metal nanoclusters (NCs) remains a hot topic as it gives answers to underlying mechanism of nanomaterials and bulk materials in...
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