Reversible Wide-Range Tuneable Luminescence of a Dual-Stimuli- Responsive Silver Cluster-Assembled Material

The Summary of main observation and conclusion Silver cluster-assembled materials (SCAMs) are emerging multi-functional materials and have attracted great attention recently. In this work, we have prepared a new SCAM of {[Ag-18((SBu)-Bu-t)(10)(CF3COO)(2)(PhPO3)(PhPO3H)(4)(bpy-NH2)(2)]center dot(PhPO3H2)}(n) (denoted as Ag(18)bpy-NH2), by a facile one-pot method. Ag(18)bpy-NH2 adopts a chain-like structure made of Ag-18 clusters bridged by bipyridyl linkers. Ag(18)bpy-NH2 exhibits reversible luminescent mechanochromism upon mechanical stimulation and solvent treatment. Moreover, it also displays luminescent thermochromism with a linear relationship of the temperature to the intensity ratio of the dual emissions over a wide temperature range of 83 to 303 K. This work might provide new insights into the assembly of multifunctional stimuli-responsive SCAMs.