文摘
We observed an unusual reversible aggregation process showing stimuli-responsive structural dynamics and optical changes attributed to the formation of a sandwich-like Au3鈥揂g鈥揂u3 cluster, which can be synthesized through both solution and mechanochemical methods. Unlike many other heteronuclear gold鈥搒ilver clusters, the affinity of two cyclic Au3 complexes and a AgI ion is solely bound by ligand unsupported Au鈥揂g bonding. The assembly/disassembly behavior, further forming nanoaggregates, is controllable by adjusting the concentration of the solution. In the solid state, the insertion of AgI ion can be implemented through a mechanochemical approach, accompanied by visual color changes and reversible luminochromism. Furthermore, an uncommon solid鈥搇iquid extraction is demonstrated, showing the uniqueness of this labile Au鈥揂g metallophilicity and hinting at the possibility of manipulating a bonding process through a heterogeneous route.