In situ Raman spectroscopy of aza-arenes adsorbed at the aqueous/silica interface

Robert A. Matzner, Roger C. Bales, Jeanne E. Pemberton

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Raman spectroscopy is used to study the effect of pH on the solute/sorbent interactions and the chemical nature of the adsorbed species at the aqueous/silica interface for the aza-arenes acridine, quinoline, and pyridine. The neutral aza-arene is hydrogen-bonded to surface sites in aqueous media in which the pH is above the pKa of the compound. A protonated aza-arene/ClO4 ion pair interacts with surface sites in aqueous solutions in which the pH is below the pKa of the compound. These results may be useful in predicting the fate of these environmentally significant compounds in groundwater.

Original languageEnglish (US)
Pages (from-to)1043-1053
Number of pages11
JournalApplied Spectroscopy
Volume48
Issue number9
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

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ASJC Scopus subject areas

  • Instrumentation
  • Spectroscopy

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