Ab initio studies of O2−(H2O)n and O3−(H2O)n anionic molecular clusters, n≤12
Item
Title (Dublin Core)
Ab initio studies of O2−(H2O)n and O3−(H2O)n anionic molecular clusters, n≤12
Description (Dublin Core)
An ab initio study of gaseous clusters of O<sub>2</sub><sup>−</sup> and O<sub>3</sub><sup>−</sup> with water is presented. Based on thorough scans of configurational space, we determine the thermodynamics of cluster growth. The results are in good agreement with benchmark computational methods and existing experimental data. We find that anionic O<sub>2</sub><sup>−</sup>(H<sub>2</sub>O)<sub><i>n</i></sub> and O<sub>3</sub><sup>−</sup>(H<sub>2</sub>O)<sub><i>n</i></sub> clusters are thermally stabilized at typical atmospheric conditions for at least <i>n</i> = 5. The first 4 water molecules are strongly bound to the anion due to delocalization of the excess charge while stabilization of more than 4 H<sub>2</sub>O is due to normal hydrogen bonding. Although clustering up to 12 H<sub>2</sub>O, we find that the O<sub>2</sub> and O<sub>3</sub> anions retain at least ca. 80 % of the charge and are located at the surface of the cluster. The O<sub>2</sub><sup>−</sup> and O<sub>3</sub><sup>−</sup> speicies are thus accessible for further reactions. We consider the distributions of cluster sizes as function of altitude before finally, the thermodynamics of a few relevant cluster reactions are considered.
Creator (Dublin Core)
Bork, N.
Kurtén, T.
Enghoff, M. B.
Pedersen, J. O. P.
Mikkelsen, K. V.
Svensmark, H.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-11-7133-2011
https://acp.copernicus.org/articles/11/7133/2011/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
