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A 59-Electron Non-Magic-Number Gold Nanocluster Au(C≡CR) Showing Unexpectedly High Stability. | LitMetric
An atomically resolved gold nanocluster Au(C≡CCH-2,4-F) () with an unusual 59 valence electrons has been synthesized. Single-crystal X-ray diffraction reveals that its Au kernel is a Au Marks decahedron capped by two Au units. The surface structure of consists of 20 linear Au(C≡CR) staples. Intercluster interactions are observed between these symmetric clusters. The existence of an unpaired electron is verified by magnetic measurement. Interestingly, this open-shell gold cluster stays intact in toluene solution at 80 °C for more than a week, and it has good charging-discharging capability under electrochemical conditions. The compact ligand shell protection around the symmetric core accounts for the high stability. This work suggests that geometric factors may play a crucial role in determining the stability of a metal nanocluster, even though the cluster has an open-shell electronic structure.
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