Microhydration of LiOH: insight from electronic decays of core-ionized states
We compute and compare the autoionization spectra of a core-ionized LiOH molecule both in its isolated and microhydrated states. Stepwise microhydration of LiOH leads to gradual elongation of the Li-OH bond length and finally to molecular dissociation. The accompanying changes in the local environme...
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| Main Author: | |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
24 June 2016
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| In: |
The journal of chemical physics
Year: 2016, Volume: 144, Issue: 24, Pages: 1-8 |
| ISSN: | 1089-7690 |
| DOI: | 10.1063/1.4954661 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1063/1.4954661 Verlag, lizenzpflichtig, Volltext: https://aip.scitation.org/doi/10.1063/1.4954661 
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| Author Notes: | Nikolai V. Kryzhevoi |
MARC
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| 520 | |a We compute and compare the autoionization spectra of a core-ionized LiOH molecule both in its isolated and microhydrated states. Stepwise microhydration of LiOH leads to gradual elongation of the Li-OH bond length and finally to molecular dissociation. The accompanying changes in the local environment of the OH− and Li+ counterions are reflected in the computed O 1s and Li 1s spectra. The role of solvent water molecules and the counterion in the spectral shape formation is assessed. Electronic decays of the microhydrated LiOH are found to be mostly intermolecular since the majority of the populated final states have at least one outer-valence vacancy outside the initially core-ionized ion, mainly on a neighboring water molecule. The charge delocalization occurs through the intermolecular Coulombic and electron transfer mediated decays. Both mechanisms are highly efficient that is partly attributed to hybridization of molecular orbitals. The computed spectral shapes are sensitive to the counterion separation as well as to the number and arrangement of solvent molecules. These sensitivities can be used for studying the local hydration structure of solvated ions in aqueous solutions. | ||
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