Title

Atmospheric Implications for Formation of Clusters of Ammonium and 1-10 Water Molecules

ACS Citation

Morrell, T. E.; Shields, G. C. Atmospheric Implications for Formation of Clusters of Ammonium and 1-10 Water Molecules. J. Phys. Chem. A 2010, 114 (12), 4266-4271.

Abstract

A mixed molecular dynamics/quantum mechanics model has been applied to the ammonium/water clustering system. The use of the high level MP2 calculation method and correlated basis sets, such as aug-cc-pVDZ and aug-cc-pVTZ, lends confidence in the accuracy of the extrapolated energies. These calculations provide electronic and free energies for the formation of clusters of ammonium and 1-10 water molecules at two different temperatures. Structures and thermodynamic values are in good agreement with previous experimental and theoretical results. The estimated concentration of these clusters in the troposphere was calculated using atmospheric amounts of ammonium and water. Results show the favorability of forming these clusters and implications for ion-induced nucleation in the atmosphere.

Source Name

Journal of Physical Chemistry A

Publication Date

2010

Volume

114

Issue

12

Page(s)

4266-4271

Document Type

Citation

Citation Type

Article