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Issue 73, 2018
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An alkynyl-protected Au40 nanocluster featuring PhC[triple bond, length as m-dash]C–Au–P^P motifs

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Abstract

An alkynyl-protected gold nanocluster [Au40(PhC[triple bond, length as m-dash]C)20(dppm)4](SbF6)4 (dppm = bis(diphenylphosphino)methane) (1) has been synthesized. Single-crystal X-ray diffraction reveals that the cluster has a face-centered cubic (FCC) Au34 kernel that is made up of two Au20 units via sharing a rectangular face. Two linear PhC[triple bond, length as m-dash]C–Au–C[triple bond, length as m-dash]CPh staple motifs are located around the central part of the Au34 core, and four L-shaped PhC[triple bond, length as m-dash]C–Au–P^P staple motifs are located at the four corners of the Au34 core. Cluster 1 and [Au38(PhC[triple bond, length as m-dash]C)20(PPh3)4](CF3SO3)2 both have the FCC Au34 core, and it is found that the diphosphine ligands bringing two more Au atoms into the system have significant effects on the optical properties and stability of the clusters. The combination of a diphosphine ligand and an alkynyl ligand is helpful in generating new ligand-protected metal nanoclusters.

Graphical abstract: An alkynyl-protected Au40 nanocluster featuring PhC [[triple bond, length as m-dash]] C–Au–P^P motifs

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Supplementary files

Article information


Submitted
16 Aug 2018
Accepted
20 Aug 2018
First published
20 Aug 2018

Chem. Commun., 2018,54, 10367-10370
Article type
Communication

An alkynyl-protected Au40 nanocluster featuring PhC[triple bond, length as m-dash]C–Au–P^P motifs

T. Wang, W. Zhang, S. Yuan, Z. Guan and Q. Wang, Chem. Commun., 2018, 54, 10367
DOI: 10.1039/C8CC06665E

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