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We use molecular beam scattering experiments to
investigate the ways in which gas molecules are captured by and react with
industrially important liquids and atmospheric aerosols. These
experiments enable us to explore the interfacial analogues of bulk
solvation, hydrogen bonding, the “like dissolves like” rule, proton
exchange, and acid-base reactions.
Scattering
experiments can disentangle the elementary steps in interfacial and bulk
reactions involving a wide range of gases and liquids (including glycerol,
sulfuric acid, salty water, molten carbonates, and surfactant-coated
liquids). These pathways are illustrated in the figure for collisions
of Cl2 with a salty solution of NaBr dissolved in
glycerol. This system is used to model near-interfacial halogen
exchange reactions that may lead to Br2-catalyzed destruction of
ozone by sea salt aerosol particles.
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