Volume 61, Issue 45 e202211628
Research Article

Ag22 Nanoclusters with Thermally Activated Delayed Fluorescence Protected by Ag/Cyanurate/Phosphine Metallamacrocyclic Monolayers through In-Situ Ligand Transesterification

Zhi-Rui Yuan

Zhi-Rui Yuan

Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Science), Ji'nan, 250353 People's Republic of China

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Dr. Zhi Wang

Dr. Zhi Wang

School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan, 250100 People's Republic of China

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Bao-Liang Han

Bao-Liang Han

School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan, 250100 People's Republic of China

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Cheng-Kai Zhang

Cheng-Kai Zhang

School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan, 250100 People's Republic of China

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Shan-Shan Zhang

Shan-Shan Zhang

School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan, 250100 People's Republic of China

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Zhen-Yu Zhu

Zhen-Yu Zhu

Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Science), Ji'nan, 250353 People's Republic of China

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Jiu-Hong Yu

Jiu-Hong Yu

Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Science), Ji'nan, 250353 People's Republic of China

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Prof. Tian-Duo Li

Prof. Tian-Duo Li

Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Science), Ji'nan, 250353 People's Republic of China

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Dr. Ying-Zhou Li

Corresponding Author

Dr. Ying-Zhou Li

Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Science), Ji'nan, 250353 People's Republic of China

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Prof. Chen-Ho Tung

Prof. Chen-Ho Tung

School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan, 250100 People's Republic of China

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Prof. Di Sun

Corresponding Author

Prof. Di Sun

School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan, 250100 People's Republic of China

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First published: 14 September 2022
Citations: 48

Graphical Abstract

Four isostructural Ag22 nanoclusters protected by a metallamacrocyclic monolayer were synthesized in high yields by in-situ ligand formation strategy. The high-electron-affinity triazine-based cyanurate ligands endow the clusters with unique core-shell interfacial bonding structure and donor-acceptor type electronic structure, resulting in the first mixed valence Ag0/I nanocluster with thermally activated delayed fluorescence (TADF) characteristic.

Abstract

The composition of protection monolayer exerts great influence on the molecular and electronic structures of atomically precise monolayer protected metal nanoclusters. Four isostructural Ag/cyanurate/phosphine metallamacrocyclic monolayer protected Ag22 nanoclusters are synthesized by kinetically controlled in-situ ligand formation-driven strategy. These eight-electron superatomic silver nanoclusters feature an unprecedented interfacial bonding structure with diverse E-Ag (E=O/N/P/Ag) interactions between the Ag13 core and metallamacrocyclic monolayer, and displays thermally activated delayed fluorescence (TADF), benefiting from their distinct donor-acceptor type electronic structures. This work not only unmasks a new core-shell interface involving cyanurate ligand but also underlines the significance of high-electron-affinity N-heterocyclic ligand in synthesizing TADF metal nanoclusters. This is the first mixed valence Ag0/I nanocluster with TADF characteristic.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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