Rhombicuboctahedral Ag-100: Four-Layered Octahedral Silver Nanocluster Adopting the Russian Nesting Doll Model

摘要

Precise atomic structure of metal nanoclusters (NCs) is fundamental for elucidating the structure-property relationships and the inherent size-evolution principles. Reported here is the largest known FCC-based (FCC=face centered cubic) silver nanocluster, [Ag-100((SC6H3F2)-F-3,4)(48)(PPh3)(8)](-): the first all-octahedral symmetric nesting Ag nanocluster with a four-layered Ag-6@Ag-38@Ag48S24@Ag(8)S(24)P(8)structure, consistent symmetry elements, and a unique rhombicuboctahedral morphology distinct from theoretical predictions and previously reported FCC-based Ag clusters. DFT studies revealed extensive interlayer interactions and degenerate frontier orbitals. The FCC-based Russian nesting doll model constitutes a new platform for the study of the size-evolution principles of Ag NCs.