Molecular and Ionic Interactions at the Oil/Water Interface as Measured by Surface Second Harmonic Generation and Sum-Frequency Generation

Molecular and Ionic Interactions at the Oil/Water Interface as Measured by Surface Second Harmonic Generation and Sum-Frequency Generation

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 measure...

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Bibliographische Detailangaben
Hauptverfasser: Richmond, G. L, Conboy, John C, Messmer, Marie C
Format: Report
Sprache:eng
Schlagworte:
Atomic and Molecular Physics and Spectroscopy
CHLOROETHANES
GEOMETRY
INTERFACES
IONS
MEASUREMENT
MOLECULAR PROPERTIES
MOLECULAR STRUCTURE
MONOMOLECULAR FILMS
OILS
ORIENTATION(DIRECTION)
Physical Chemistry
REFLECTION
SECOND HARMONIC GENERATION
SUM FREQUENCY GENERATION
WATER
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Beschreibung
Zusammenfassung: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 hydrocarbon/water interfaces and dichloroethane/water 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.