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Research Article

Superatomic Au13 clusters ligated by different N-heterocyclic carbenes and their ligand-dependent catalysis, photoluminescence, and proton sensitivity

Hui Shen1, Sijin Xiang1, Zhen Xu1, Chen Liu2, Xihua Li1, Cunfa Sun1, Shuichao Lin1, Boon K. Teo1, Nanfeng Zheng1( )
State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National & Local Joint Engineering Research Center of Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
School of Pharmaceutical Science, Xiamen University, Xiamen 361002, China
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Graphical Abstract

Abstract

We report herein a class of superatomic Au13 clusters stabilized by different N-heterocyclic carbenes (NHCs). The clusters show diverse metal surface structures, properties and functions as exemplified by: (1) the first anionic Au13 cluster [Au13(NHC-1)6Br6]-, which has bulky NHC-1 ligands that lead to a rather open metal surface contributing to its high catalytic activity; (2) the tricationic cluster [Au13(NHC-2)5Br2]3+ which has bidentate, benzyl-rich NHC-2 ligands that make it ultra-stable and highly-luminescent, suitable for bio-imaging; and (3) by bearing two pyridyl groups on NHC-3, the dicationic cluster [Au13(NHC-3)9Cl3]2+ exhibits reversible and stable visible absorption and solubility responses to protonation/deprotonation cycles, making it a potential pH sensor (NHC-1 = 1,3-diisopropylbenzimidazolin-2-ylidene; NHC-2 = 1,3-bis(1-benzyl-1H-benzimidazol-1-ium-3-yl)propane; NHC-3 = 1,3-bis(picolyl)benzimidazolin-2-ylidene). The study nicely demonstrates the importance of ligands in designing metal nanoclusters with desired functionalities.

Keywords

carbene ligandsgold nanoclustercatalysisluminescenceAu13

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Nano Research
Volume 13 Issue 7,
July 2020
Pages 1908-1911
DOI: 10.1007/s12274-020-2685-0
Cite this article:
Shen H, Xiang S, Xu Z, et al. Superatomic Au13 clusters ligated by different N-heterocyclic carbenes and their ligand-dependent catalysis, photoluminescence, and proton sensitivity. Nano Research, 2020, 13(7): 1908-1911. https://doi.org/10.1007/s12274-020-2685-0
Topics:
Catalysis Catalyst activityGold nanoclusters LuminescenceNanoclustersOrganic compoundspH sensors
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Sixth Nano Research Award

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Received: 10 November 2019
Revised: 26 January 2020
Accepted: 27 January 2020
Published: 29 February 2020
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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