Aggregation-induced phosphorescence sensitization in two heptanuclear and decanuclear gold–silver sandwich clusters

Zhou Lu; Yu-Jie Yang; Wen-Xiu Ni; Mian Li; Yifang Zhao; Yong-Liang Huang; Dong Luo; Xiaoping Wang; Mohammad A. Omary; Dan Li

doi:10.1039/D0SC05095D

Aggregation-induced phosphorescence sensitization in two heptanuclear and decanuclear gold–silver sandwich clusters†

Zhou Lu,

‡^ab Yu-Jie Yang,‡^c Wen-Xiu Ni,

^d Mian Li,

^c Yifang Zhao,

^a Yong-Liang Huang,

^d Dong Luo,

^a Xiaoping Wang,

^e Mohammad A. Omary

*^b and Dan Li

*^a

Author affiliations

* Corresponding authors

^a College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou 510632, P. R. China
E-mail: danli@jnu.edu.cn

^b Department of Chemistry, University of North Texas, 1155 Union Circle #305070, Denton, Texas 76203, USA
E-mail: omary@unt.edu

^c Department of Chemistry, Shantou University, Guangdong 515063, P. R. China

^d Department of Chemistry, Shantou University Medical College, Shantou, Guangdong 515041, P. R. China

^e Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6475, USA

Abstract

The strategy of aggregation-induced emission enhancement (AIEE) has been proven to be efficient in wide areas and has recently been adopted in the field of metal nanoclusters. However, the relationship between atomically precise clusters and AIEE is still unclear. Herein, we have successfully obtained two few-atom heterometallic gold–silver hepta-/decanuclear clusters, denoted Au₆Ag and Au₉Ag, and determined their structures by X-ray diffraction and mass spectrometry. The nature of the Au^I⋯Ag^I interactions thereof is demonstrated through energy decomposition analysis to be far-beyond typical closed-shell metal–metal interaction dominated by dispersion interaction. Furthermore, a positive correlation has been established between the particle size of the nanoaggregates and the photoluminescence quantum yield for Au₆Ag, manifesting AIEE control upon varying the stoichiometric ratio of Au : Ag in atomically-precise clusters.

Chemical Science

Aggregation-induced phosphorescence sensitization in two heptanuclear and decanuclear gold–silver sandwich clusters†

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Aggregation-induced phosphorescence sensitization in two heptanuclear and decanuclear gold–silver sandwich clusters

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