Appearance of V-encapsulated tetragonal prism motifs in VSi10− and VSi11− clusters
Literature Information
Li-Juan Zhang, Bin Yang, Da-Zhi Li
The structural and electronic properties of V-doped silicon clusters, VSi10−/0 and VSi11−/0, were investigated by using mass-selected anion photoelectron spectroscopy in combination with theoretical calculations. Photoelectron spectroscopy of VSi10− and VSi11− clusters with spectral similarity reveals that the two cluster structures resemble each other. Interestingly, theoretical calculation studies provide definitive evidence of the global minima for the two clusters to be V-encapsulated tetragonal prism motifs with extra Si atoms bicapped and tricapped, respectively. The enhanced stability of the tetragonal prism unit in VSi10− and VSi11− is due to the strong interactions between 3d (V) and 3p (Si) orbitals, and more charge transfers from the Sin framework to the encapsulated V atom. The tetragonal prism unit possessed by both the VSi10− and VSi11− clusters is observed for the first time in the current work, and may offer new ideas in developing components for Si-based nanodevices.
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