Molecular and Ionic Interactions at the Oil/Water Interface as Measured by Surface Second Harmonic Generation and Sum-Frequency Generation.
Technical rept. Jun 94-May 95,
OREGON UNIV EUGENE DEPT OF CHEMISTRY
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Direct measurement of molecular properties of these fluid interfacial regions remains a challenging task. In recent years we have been applying two techniques to such problems, surface second harmonic generation SHG and sum-frequency generation SFG. The success that we have had in making measurements of the structural and molecular properties of a variety of neat hydrocarbonwater interfaces and dichloroethanewater interfaces has come from employing a total intenal reflection geometry TIR. We have examined interfacial order, molecular orientation and ionic adsorption at various of water interfaces with TIR SHG and TIR SFG. The results provide a valuable insight into how molecules and ions interact at these fluid interfaces.
- Physical Chemistry
- Atomic and Molecular Physics and Spectroscopy