1. Sum frequency generation investigation of water at the surface of H2O/H2SO4 and H2O/Cs2SO4 binary systems
- Author
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D. J. Campbell, Mary Jane Shultz, Cheryl Schnitzer, and Steve Baldelli
- Subjects
Sum-frequency generation ,Chemistry ,Chemical physics ,Metal ions in aqueous solution ,Inorganic chemistry ,HSAB theory ,General Physics and Astronomy ,Ionic bonding ,Molecule ,Electrolyte ,Physical and Theoretical Chemistry ,Hydrate ,Surface water - Abstract
The vibrational structure of water at the air/solution interface of an ionic solution has been obtained for the first time. Using vibrational sum frequency generation it is determined that ions in solution have a large orientational effect on the structure of the surface water. Electrolytic solutions, ionic in nature, cause water to be oriented into a more regular hydrogen-bonded network through an electric double layer at the interface. In electrolytic solutions where molecular or associated H 2 SO 4 or Cs 2 SO 4 species dominate, the surface water molecules are bound into hydrate complexes. These effects are explained using hard soft acid base (HSAB) theory.
- Published
- 1998
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