Accession Number : ADA295484

Title :   Observation and Molecular Ordering at the Liquid-Liquid Interface by Resonant Sum Frequency Generation.

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

Corporate Author : OREGON UNIV EUGENE DEPT OF CHEMISTRY

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

PDF Url : ADA295484

Report Date : 12 JUN 1995

Pagination or Media Count : 11

Abstract : The vibrational spectrum of an amphiphilic surfactant, sodium dodecyl sulfate (SDS) at the interface between two immisicible liquids, D2O/CCl4, has been obtained for the first time by resonant sum frequency generation. The vibrational spectra obtained offer spectroscopic evidence for interfacial ordering of the alkyl chain as a function of surface coverage. Analysis of the ratio of the methyl/methylene peak intensities as a function of bulk aqueous phase concentration of SDS suggests that unlike the liquid-air and solid-liquid interfaces SDS is considerably more disordered at the liquid-liquid interface. jg

Descriptors :   *FREQUENCY, *LIQUID PHASES, *RESONANCE, PEAK VALUES, RATIOS, SPECTROSCOPY, METHYL RADICALS, AIR, INTERFACES, PHASE TRANSFORMATIONS, INTENSITY, SURFACES, SPECTRA, CHAINS, SURFACE ACTIVE SUBSTANCES, METHYLENES, ALKYL RADICALS, VIBRATIONAL SPECTRA, DODECANE, SODIUM SULFATES.

Subject Categories : Inorganic Chemistry
      Organic Chemistry
      Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE