Accession Number : ADA295107

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

Descriptive Note : Technical rept. Jun 94-May 95,

Corporate Author : OREGON UNIV EUGENE DEPT OF CHEMISTRY

Personal Author(s) : Richmond, G. L. ; Conboy, John C. ; Messmer, Marie C.

PDF Url : ADA295107

Report Date : 12 JUN 1995

Pagination or Media Count : 4

Abstract : 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.

Descriptors :   *INTERFACES, *SECOND HARMONIC GENERATION, *CHLOROETHANES, *MONOMOLECULAR FILMS, IONS, MEASUREMENT, WATER, ORIENTATION(DIRECTION), REFLECTION, GEOMETRY, MOLECULAR STRUCTURE, OILS, MOLECULAR PROPERTIES.

Subject Categories : Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE