Extra Silver Atom Triggers Room‐Temperature Photoluminescence in Atomically Precise Radarlike Silver Clusters

Luminescent metal clusters show promise for applications in imaging and sensing. However, promoting emission from metal clusters at room temperature is a challenging task owing to the lack of an efficient approach to suppress the nonradiative decay process in metal cores. We report herein that the a...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2020-07, Vol.59 (29), p.11898-11902
Main Authors: Yang, Jin‐Sen, Han, Zhen, Dong, Xi‐Yan, Luo, Peng, Mo, Hui‐Lin, Zang, Shuang‐Quan
Format: Article
Language:English
Subjects:
atomic precision
cluster compounds
Emission
Luminescence
Metal clusters
Metals
Photoluminescence
Photons
Rigidity
Room temperature
Silver
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Summary:Luminescent metal clusters show promise for applications in imaging and sensing. However, promoting emission from metal clusters at room temperature is a challenging task owing to the lack of an efficient approach to suppress the nonradiative decay process in metal cores. We report herein that the addition of a silver atom into a metal interstice of the radarlike thiolated silver cluster [Ag27(StBu)14(S)2(CF3COO)9(DMAc)4]⋅DMAc (NC1, DMAc=dimethylacetamide), which is non‐emissive under ambient conditions, produced another silver cluster [Ag28(AdmS)14(S)2(CF3COO)10(H2O)4] (NC2) that displayed bright green room‐temperature photoluminescence aided by the new ligand 1‐adamantanethiol (AdmSH). The 28th Ag atom, which hardly affects the geometrical and electronic structures of the Ag–S skeleton, triggered the emission of green light as a result of the rigidity of the cluster structure. Magic number 28: A 28th silver atom combined with a more rigid thiolate ligand led to room‐temperature photoluminescence in radarlike silver clusters possessing similar geometrical and electronic structures (see picture). The additional silver atom triggered the emission of green light as a result of the rigidity of the cluster structure.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202004268