Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 25, Issue 8, Pages 6498-6509Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cp04978c
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Bimetallic niobium-doped aluminum clusters, NbAln-/0 (n = 3-12), were studied using size-selected anion photoelectron spectroscopy and theoretical calculations. The structures of NbAln- anions with n = 3-8 can be described by gradually adding Al atoms to the NbAl3- core. From n = 9, the lowest-energy geometric structures of NbAl9-12- transform into bilayer structures. NbAl12- has a C-3v symmetric structure, resembling a NbAl6 regular hexagon over a bowl-shaped Al-6 structure. The unusual stability of NbAl9 and NbAl12- may be attributed to their closed-shell electron configurations with superatomic features.
Bimetallic niobium-doped aluminum clusters, NbAln-/0 (n = 3-12), are investigated through a synergetic combination of size-selected anion photoelectron spectroscopy and theoretical calculations. It is found that the dominant structures of NbAln- anions with n = 3-8 can be described by gradually adding Al atoms to the NbAl3- core. Starting from n = 9, the lowest-energy geometric structures of NbAl9-12- transform into bilayer structures. In particular, NbAl12- has a C-3v symmetric structure, which can be viewed as a NbAl6 regular hexagon over a bowl-shaped Al-6 structure. More detailed analyses indicate that NbAl9 and NbAl12- possess unusual stability, which may be attributed to their closed-shell electron configurations with superatomic features.
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