Collision Dynamics and Solvation of Water Molecules in a Liquid Methanol Film
Artikel i vetenskaplig tidskrift, 2011

Environmental molecular beam experiments are used to examine water interactions with liquid methanol films at temperatures from 170 to 190 K. We find that water molecules with 0.32 eV incident kinetic energy are efficiently trapped by the liquid methanol. The scattering process is characterized by an efficient loss of energy to surface modes with a minor component of the incident beam that is inelastically scattered. Thermal desorption of water molecules has a well characterized Arrhenius form with an activation energy of 0.47 ± 0.11 eV and pre-exponential factor of 4.6 × 10^(15±3) s^(–1). We also observe a temperature-dependent incorporation of incident water into the methanol layer. The implication for fundamental studies and environmental applications is that even an alcohol as simple as methanol can exhibit complex and temperature-dependent surfactant behavior.

Författare

Erik S Thomson

Göteborgs universitet

Xiangrui Kong

Göteborgs universitet

Patrik U Andersson

Göteborgs universitet

Nikola Markovic

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Jan B. C. Pettersson

Göteborgs universitet

Journal of Physical Chemistry Letters

1948-7185 (eISSN)

Vol. 2 17 2174-2178

Ämneskategorier

Fysikalisk kemi

Meteorologi och atmosfärforskning

DOI

10.1021/jz200929y