Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 27, Pages 9532-9535Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja5025113
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Funding
- National Basic Research Program of China (973 Program) [2013CB834803, 2012CB821706]
- National Natural Science Foundation of China [21171114, 91222202]
- China Postdoctoral Science Foundation [2012M521622, 2013T60811]
- Guangdong Natural Science Foundation [S2012040006968]
- Shantou University
- Ministry of Higher Education of Malaysia [UM.C/HIR-MOHE/SC/03]
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We observed an unusual reversible aggregation process showing stimuli-responsive structural dynamics and optical changes attributed to the formation of a sandwich-like Au-3-Ag-Au-3 cluster, which can be synthesized through both solution and mechanochemical methods. Unlike many other heteronudear gold-silver clusters, the affinity of two cyclic Au-3 complexes and a Ag-I ion is solely bound by ligand unsupported Au-Ag bonding. The assembly/disassembly behavior, further forming nanoaggregates, is controllable by adjusting the concentration of the solution. In the solid state, the insertion of Ag-I ion can be implemented through a mechanochemical approach, accompanied by visual color changes and reversible luminochromism. Furthermore, an uncommon solid-liquid extraction is demonstrated, showing the uniqueness of this labile Au-Ag metallophilicity and hinting at the possibility of manipulating a bonding process through a heterogeneous route.
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