Surface organization of aqueous MgCl2 and application to atmospheric marine aerosol chemistry.

ABSTRACT: Inorganic salts in marine aerosols play an active role in atmospheric chemistry, particularly in coastal urban regions. The study of the interactions of these ions with water molecules at the aqueous surface helps to elucidate the role of inorganic cations and anions in atmospheric processes. We present surface vibrational sum frequency generation (SFG) spectroscopic and molecular dynamics (MD) studies of aqueous MgCl(2) surfaces as models of marine aerosol. Spectroscopy results reveal that the disturbance of the hydrogen bonding environment of the air/aqueous interface is dependent on the MgCl(2) concentration. At low concentrations (< 1 M) minor changes are observed. At concentrations above 1 M the hydrogen bonding environment is highly perturbed. The 2.1 M intermediate concentration sol

SUBMITTER: Casillas-Ituarte NN 

PROVIDER: S-EPMC2872395 | biostudies-literature | 2010 Apr

REPOSITORIES: biostudies-literature