Volume 136, Issue 48 e202408310
Zuschrift

Atomically Precise Ternary Cluster: Polyoxometalate Cluster Sandwiched by Gold Clusters Protected by N-Heterocyclic Carbenes

Ren Chen

Ren Chen

College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000 China

These authors contributed equally to this work.

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Dr. Xiao-Hong Ma

Dr. Xiao-Hong Ma

College of Chemistry, Zhengzhou University, Zhengzhou, 450001 China

These authors contributed equally to this work.

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Dr. Peng Luo

Dr. Peng Luo

College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000 China

These authors contributed equally to this work.

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Dr. Chun-Hua Gong

Dr. Chun-Hua Gong

College of Chemistry, Zhengzhou University, Zhengzhou, 450001 China

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Dr. Jun-Jun Sun

Dr. Jun-Jun Sun

College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000 China

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Dr. Yu-Bing Si

Dr. Yu-Bing Si

College of Chemistry, Zhengzhou University, Zhengzhou, 450001 China

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Prof. Xi-Yan Dong

Corresponding Author

Prof. Xi-Yan Dong

College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000 China

College of Chemistry, Zhengzhou University, Zhengzhou, 450001 China

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Dr. Fangfang Pan

Corresponding Author

Dr. Fangfang Pan

College of Chemistry, Central China Normal University, Wuhan, 430079 China

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Prof. Shuang-Quan Zang

Corresponding Author

Prof. Shuang-Quan Zang

College of Chemistry, Zhengzhou University, Zhengzhou, 450001 China

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First published: 29 August 2024

Abstract

Coinage metal (Au, Ag, Cu) cluster and polyoxometalate (POM) cluster represent two types of subnanometer “artificial atoms” with significant potential in catalysis, sensing, and nanomedicine. While composite clusters combining Ag/Cu clusters with POM have achieved considerable success, the assembly of gold clusters with POM is still lagging. Herein, we first designedly synthesized two cluster structural units: an Au3O cluster stabilized by diverse N-heterocyclic carbene (NHC) ligands and an amine-terminated POM linker. The subsequent reaction involved amine substitution in the POM linker for the central O atom in the Au3O cluster, resulting in the first ternary composite cluster—a POM cluster sandwiched by two Au clusters protected by NHCs. Single-crystal X-ray diffraction and other characteristic methods characterized their atomically precise structures. Furthermore, altering the NHC ligands decreased the number of gold atoms in the sandwich structures, accompanying the different protonated degrees of amine ligand in the terminal end of the POM linker. These composite clusters showed excellent performances in catalytic H2O2 conversion through the synergistic effect between gold clusters and POM clusters. This work opens a new avenue to functional composite metal clusters and would promote their enhanced catalysis applications through intercluster synergistic interactions within composite systems.

Data Availability Statement

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

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.