Superatomic Au13 clusters ligated by different N-heterocyclic carbenes and their ligand-dependent catalysis, photoluminescence, and proton sensitivity
| Autor: | Boon K. Teo, Chen Liu, Xihua Li, Shui-Chao Lin, Hui Shen, Nanfeng Zheng, Sijin Xiang, Cunfa Sun, Zhen Xu |
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| Rok vydání: | 2020 |
| Předmět: |
Denticity
Ligand Chemistry Protonation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Catalysis Nanoclusters Metal Crystallography Deprotonation visual_art visual_art.visual_art_medium Cluster (physics) General Materials Science Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Nano Research. 13:1908-1911 |
| ISSN: | 1998-0000 1998-0124 |
| Popis: | 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)9CI3]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. |
| Databáze: | OpenAIRE |
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