Abstract
Quinoline is known to adsorb on a mercury electrode surface with several differentorientations and it sometimes blocks other electrochemical reactions. The Ramanmicroprobe technique has been applied successfully to observe reorientations ofquinoline adsorbed on the mercury surface from neutral and basic aqueoussolutions. The orientation-distance profile from the mercury surface was also studied.A Raman band intensity of quinoline (1373 cm−1) relative to the intensity ofperchlorate ion (931 cm−1) was measured. The peak positions did not shift evenwhen the applied potential was altered, but the relative peak intensity changed.It was concluded that the adsorbed quinoline changes its orientation from a flatat −0.1 > E > −0.3V, to a standing at E < −0.5 V, passing through a mixtureof the two orientations when −0.3 > E > −0.5 V.
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Ozeki, T., Odziemkowski, M. & Irish, D.E. Study of Adsorption, Condensation, Orientation, and Reduction of Quinoline Molecules on a Pure Mercury Electrode Using Raman Microprobe Spectroscopy. Journal of Solution Chemistry 29, 861–878 (2000). https://doi.org/10.1023/A:1005178532280
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DOI: https://doi.org/10.1023/A:1005178532280