Citation: Shu-Ping DING, Zong-Yao ZHANG, Guo-Jun ZHOU, Rui CAO. Synthesis, Structure and Luminescence Properties of Dumbbell-like Silver Clusters[J]. Chinese Journal of Structural Chemistry, ;2020, 39(10): 1824-1834. doi: 10.14102/j.cnki.0254–5861.2011–2702 shu

Synthesis, Structure and Luminescence Properties of Dumbbell-like Silver Clusters

Shu-Ping DING ^{a, ②} ,
Zong-Yao ZHANG ^{b, ②} ,
Guo-Jun ZHOU ^a ,
Rui CAO ^a,,

a.
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
b.
Department of Chemistry, Renmin University of China, Beijing 100872, China

Corresponding author: Rui CAO, ruicao@ruc.edu.cn
Received Date: 16 December 2019
Accepted Date: 17 April 2020

Fund Project: the National Natural Science Foundation of China 21101170the National Natural Science Foundation of China 21573139

Figures(11)

In this work, three stable dumbbell-shaped silver clusters 1~3, formed by a novel bifunctional ligand Ph₂P-C₆H₄-3-C≡CH, are presented. All three complexes have cage structures constructed with thirty-six silver atoms, which are templated by chloride anions. During the self-assembly process of silver acetylides, argentophilic interactions and Ag(I)-ethynide interactions are important for the formation of silver cores to yield a diversity of silver clusters. Weak molecular interactions (π-π, C−H···π, C−H···F, C−H···O) are also found in these complexes, which are crucial to stabilizing these silver clusters. Compared with simple alkynyl ligands (RC≡C⁻), the introduction of phosphine groups into alkynyl ligand can effectively control the undesired infinite growth of silver acetylides. The photophysical behaviors of complexes 1~3 are studied, showing intense orange room-temperature luminescence in the solid state upon the exposure to UV light. The luminescence mainly arises from ligand-to-metal charge transfer (LMCT) and metal-cluster-lefted transitions (MC) within the silver clusters.
- silver cluster,
- argentophilic interaction,
- bifunctional ligand,
- Ag(Ⅰ)-ethynide interaction,
- luminescence
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