Abstract
The structure and stability of neutral polyoxometalate cages (Mo2O6) m (m=1–13) have been computed systematically. These neutral cages can be viewed topologically as polyhedra containing triangles (f 3) and squares (f 4). The relative stability of these polyhedra is associated with the location and separation of the f 3. The initial stable isomers were preselected by the number of shared triangle edges (N 33), and the predicted stability was validated further at the GGA-PW91/DND level of density function theory with the fine quality of mesh size. For large clusters, the square neighbor signature (P 4444), which is similar to the hexagon neighbor rule for fullerene, becomes more applicable. The calculated disproportionation energies indicate that Mo6O18 (O h, Lindqvist), Mo12O36 (O h, α Keggin), Mo18O54 (D 3h, Wells–Dawson) and Mo24O72 (O h) cages have enhanced stability.
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Notes
Because each bridged-oxygen linked by two metal atoms, so in fact each pyramid reduced to one {MO3} unit in average
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The work was supported by Chinese Academy of Sciences and the National Natural Science Foundation China (20471034).
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Dedicated to Professor Dr. Paul von Ragué Schleyer on the occasion of his 75th birthday
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Zhang, FQ., Wu, HS., Xu, YY. et al. Structure and stability of neutral polyoxometalate cages: (Mo2O6) m (m=1–13). J Mol Model 12, 551–558 (2006). https://doi.org/10.1007/s00894-006-0108-0
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DOI: https://doi.org/10.1007/s00894-006-0108-0