COMP 70 |
| Molecular beam scattering experiments are used to investigate the effects of ion size and charge on interfacial reactions between gaseous DCl and liquid glycerol. Previous experiments using pure glycerol show that a small fraction of the DCl molecules undergo rapid D->H exchange in the interfacial region followed by immediate HCl evaporation before incorporation into the bulk. In a 2.6 M NaI glycerol solution, the dissolved Na+ and I- ions enhance interfacial D->H exchange and suppress bulk DCl solvation. By using different salt solutions of NaBr, KI, LiI and CaI2, we find that the enhancement of interfacial D->H exchange is influenced more by the identity of the cation than the identity of the anion, although recent literature shows the anion to be closer to the surface than the cation. This talk will explore the roles of ion size, charge, and concentration in controlling interfacial interactions between DCl molecules and salty glycerol. |
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Recent Advances in Studies of Molecular Processes at Interfaces
1:30 PM-5:10 PM, Sunday, August 19, 2007 BCEC -- 156A, Oral
Division of Computers in Chemistry |