In situ Raman Spectroscopy of Aza-Arenes Adsorbed at the Aqueous/Silica Interface-Reference-Cited by-同舟云学术

In situ Raman Spectroscopy of Aza-Arenes Adsorbed at the Aqueous/Silica Interface

Published:1994-09 Issue:9 Volume:48 Page:1043-1053
ISSN:0003-7028
Container-title:Applied Spectroscopy
language:en
Short-container-title:Appl Spectrosc

Author:

Matzner Robert A.¹,Bales Roger C.¹,Pemberton Jeanne E.¹

Affiliation:

1. Department of Hydrology and Water Resources (R.A.M., R.C.B.); and Department of Chemistry (J.E.P.), University of Arizona, Tucson, Arizona 85721

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 p Ka 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.

Publisher

SAGE Publications

Subject

Spectroscopy,Instrumentation

Link

http://journals.sagepub.com/doi/pdf/10.1366/0003702944029406

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