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Infrared spectroscopy of hydrated sulfate dianions.

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Santambrogio,  Gabriele
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Meijer,  Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Asmis,  Knut R.
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Zhou, J., Santambrogio, G., Brümmer, M., Moore, D. T., Wöste, L., Meijer, G., et al. (2006). Infrared spectroscopy of hydrated sulfate dianions. Journal of Chemical Physics, 125, 111102-1-111102-4. doi:10.1063/1.2351675.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-037F-6
Abstract
We report the first infrared spectra of multiply-charged anions in the gas phase. The spectra of SO₄²⁻·(H2O)n, with n=3–24, show four main bands assigned to two vibrations of the dianionic core, the water bending mode, and solvent libration. The triply degenerate SO₄²⁻ antisymmetric stretch vibration probes the local solvent symmetry, while the solvent librational band is sensitive to the hydrogen bonding network. The spectra and accompanying electronic structure calculations indicate a highly symmetric structure for the n=6 cluster and closure of the first solvation shell at n=12