COLL 236 |
| Selimar Rivera-Rubero and Steven Baldelli. Department of Chemistry, University of Houston, Houston, TX 77204 |
| The orientation of the 1-butyl-3-methylimidazolium ionic liquids at the air-liquid interface was determined using Sum Frequency Generation spectroscopy, SFG. Analysis was performed for the bromide, hexafluorophosphate, tetrafluoroborate and methyl sulfate anions. Isotopic labeling as well as IR and Raman spectroscopy supports the vibrational modes assignment and peaks identification. Molecular orientation was determined by analysis of the polarization-dependent SFG spectra. For a compound dried in vacuum to 10-5Torr the cation seems to be oriented with the ring parallel to the surface plane and the butyl chain projecting into the gas phase. |
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Posters: Fundamental Research in Surface and Colloid Chemistry
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |