Accession Number : ADA295480

Title :   Total Internal Reflection Second Harmonic Generation from the Interface Between Two Immisicible Electrolyte Solutions.

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

Corporate Author : OREGON UNIV EUGENE DEPT OF CHEMISTRY

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

PDF Url : ADA295480

Report Date : 12 JUN 1995

Pagination or Media Count : 15

Abstract : Total internal reflection second harmonic generation (TIR SHG) is used to investigate the interface between two immisicible electrolyte solutions (ITIES) under potential control. The observed potential dependent second harmonic response is attributed to a resonance enhanced process arising from the tetraphenylborate (TPB) ion. As the aqueous phase is biased positive of he organic phase, a large increase in the SH response is observed and is attributed to the desorption of the TPB ion at the interface. The potential dependent SH data allows for the determination of the TPB anion concentration at the interface. TIR SHG compliments measurements of the surface excess and can function as a means of measuring the relative concentration of electrolyte species responsible for the potential drop across the electrochemical double layer. jg

Descriptors :   *INTERFACES, *SECOND HARMONIC GENERATION, *REFLECTION, *ELECTROLYTES, CONTROL, IONS, SOLUTIONS(MIXTURES), LAYERS, WATER, ELECTROCHEMISTRY, RESONANCE, ORGANIC COMPOUNDS, DESORPTION, ANIONS, CONCENTRATION(CHEMISTRY).

Subject Categories : Physical Chemistry
      Organic Chemistry
      Electricity and Magnetism
      Optics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE