COLL 95 |
| Heather C. Allen, Gang Ma, Dingfang Liu, and Elizabeth L. Hommel. Department of Chemistry, The Ohio State University, 100 W 18th Ave, Columbus, OH 43210 |
| Alcohols, aromatic hydrocarbons, and aqueous salt solutions were investigated using sum frequency generation (SFG), broad bandwidth and scanning surface-selective spectroscopies, in addition to IR and Raman spectroscopy. Data reveals that methanol is a more efficient hydrogen bonding acceptor when the methanol molecule resides in the interfacial region. Unlike benzene and other single aromatic ring compounds, the orientational structure of a 1-methyl naphthalene (1-MN) surface is altered with the introduction of relatively few water molecules (1 water: 336 1-MN). Rearrangement of the surface molecules is induced leading to an increased number density of the methyl groups arranged such that more methyl groups are oriented in the same direction into the air phase. Water surface structure was also investigated for several sodium salt solutions and data indicate a significantly disturbed hydrogen bonding environment from that of neat water and an increase in interfacial depth for the NaBr and NaI solution surfaces. |
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Vibrational Analyses of Dry and Wet Surfaces
8:30 AM-11:30 AM, Monday, March 29, 2004 Marriott -- Grand Ballroom H, Oral
Division of Colloid and Surface Chemistry |