Interaction of SO2 with the Surface of a Water Nanodroplet

Jie Zhong, Chongqin Zhu, Lei Li, Geraldine L. Richmond, Joseph S. Francisco, Xiao C Zeng

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We present a comprehensive computational study of interaction of a SO2 with water molecules in the gas phase and with the surface of various sized water nanodroplets to investigate the solvation behavior of SO2 in different atmospheric environments. Born-Oppenheimer molecular dynamics (BOMD) simulation shows that, in the gas phase and at a temperature of 300 K, the dominant interaction between SO2 and H2O is (SO2)S⋯O(H2O), consistent with previous density-functional theory (DFT) computation at 0 K. However, at the surface of a water nanodroplet, BOMD simulation shows that the hydrogen-bonding interaction of (SO2)O⋯H(H2O) becomes increasingly important with the increase of droplet size, reflecting a marked effect of the water surface on the SO2 solvation. This conclusion is in good accordance with spectroscopy evidence obtained previously (J. Am. Chem. Soc. 2005, 127, 16806; J. Am. Chem. Soc. 2006, 128, 3256). The prevailing interaction (SO2)O⋯H(H2O) on a large droplet is mainly due to favorable exposure of H atoms of H2O at the air-water interface. Indeed, the conversion of the dominant interaction in the gas phase (SO2)S⋯O(H2O) to the dominant interaction on the water nanodroplet (SO2)O⋯H(H2O) may incur effects on the SO2 chemistry in atmospheric aerosols because the solvation of SO2 at the water surface can affect the reactive sites and electrophilicity of SO2. Hence, the solvation of SO2 on the aerosol surface may have new implications when studying SO2 chemistry in the aerosol-containing troposphere.

Original languageEnglish (US)
Pages (from-to)17168-17174
Number of pages7
JournalJournal of the American Chemical Society
Volume139
Issue number47
DOIs
StatePublished - Nov 29 2017

Fingerprint

Solvation
Water
Aerosols
Gases
Molecular Dynamics Simulation
Molecular dynamics
Atmospheric aerosols
Troposphere
Computer simulation
Hydrogen Bonding
Density functional theory
Catalytic Domain
Spectrum Analysis
Hydrogen bonds
Air
Spectroscopy
Atoms
Hydrogen
Molecules
Temperature

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Interaction of SO2 with the Surface of a Water Nanodroplet. / Zhong, Jie; Zhu, Chongqin; Li, Lei; Richmond, Geraldine L.; Francisco, Joseph S.; Zeng, Xiao C.

In: Journal of the American Chemical Society, Vol. 139, No. 47, 29.11.2017, p. 17168-17174.

Research output: Contribution to journalArticle

Zhong, J, Zhu, C, Li, L, Richmond, GL, Francisco, JS & Zeng, XC 2017, 'Interaction of SO2 with the Surface of a Water Nanodroplet', Journal of the American Chemical Society, vol. 139, no. 47, pp. 17168-17174. https://doi.org/10.1021/jacs.7b09900
Zhong, Jie ; Zhu, Chongqin ; Li, Lei ; Richmond, Geraldine L. ; Francisco, Joseph S. ; Zeng, Xiao C. / Interaction of SO2 with the Surface of a Water Nanodroplet. In: Journal of the American Chemical Society. 2017 ; Vol. 139, No. 47. pp. 17168-17174.
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