| Autor: |
Pei, Xiao-Li, Zhao, Pei, Ube, Hitoshi, Lei, Zhen, Ehara, Masahiro, Shionoya, Mitsuhiko |
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| Zdroj: |
Nature Communications; 6/12/2024, Vol. 15 Issue 1, p1-10, 10p |
| Abstrakt: |
Chemical etching of nano-sized metal clusters at the atomic level has a high potential for creating metal number-specific structures and functions that are difficult to achieve with bottom-up synthesis methods. In particular, precisely etching metal atoms one by one from nonmetallic element-centred metal clusters and elucidating the relationship between their well-defined structures, and chemical and physical properties will facilitate future materials design for metal clusters. Here we report the single-gold etching at a hypercarbon centre in gold(I) clusters. Specifically, C-centred hexagold(I) clusters protected by chiral N-heterocyclic carbenes are etched with bisphosphine to yield C-centred pentagold(I) (CAuI5) clusters. The CAuI5 clusters exhibit an unusually large bathochromic shift in luminescence, which is reproduced theoretically. The etching mechanism is experimentally and theoretically suggested to be a tandem dissociation-association-elimination pathway. Furthermore, the vacant site of the central carbon of the CAuI5 cluster can accommodate AuCl, allowing for post-functionalisation of the C-centred gold(I) clusters. The control of atomically precise etching of nano-sized metal clusters is important for understanding their structure-specific properties. Here, the authors report the etching of a single gold atom on a hypercarbon centre of gold(I) clusters. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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