Abstract

Two atom-precise silver nanoclusters [Ag25Cl2(Tab)14(PhCOO)11(DMF)4](PF6)12 (Ag25, DMF=N,N-dimethylformamide) and [Ag26Cl2(Tab)14(PhCOO)13(DMAc)4](PF6)11(Ag26, DMAc=N,N-dimethylacetamide) were synthesized based on the electrically neutral thiolate protective ligand, 4-(trimethylammonio)benzenethiolate (Tab). The weak Ag-S interaction in Tab-protected silver nanoclusters allows to insert or leave a single silver atom in the Ag-S skeleton through solvent-trigger core fragmentation and re-arrangement, thereby realizing the reversible conversion of Ag25 and Ag26 for the first time.

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