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Nonsuperatomic [Au23(SC6H11)16]- Nanocluster Featuring Bipyramidal Au15 Kernel and Trimeric Au3(SR)4 Motif

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Journal J Am Chem Soc
Specialty Chemistry
Date 2013 Nov 27
PMID 24274138
Citations 20
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Abstract

We report the X-ray structure of a cyclohexanethiolate-capped [Au23(SR)16](-) nanocluster (counterion: tetraoctylammonium, TOA(+)). The structure comprises a cuboctahedron-based bipyramidal Au15 kernel, which is protected by two staple-like trimeric Au3(SR)4 motifs, two monomeric Au(SR)2 and four plain bridging SR ligands. Electronic structure analysis reveals nonsuperatomic feature of [Au23(SR)16](-) and confirms the Au15 kernel and surface motifs. The Au15 kernel and trimeric staple motif are unprecedented and offer new insight in understanding the structure evolution of gold nanoclusters.

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