In-Situ Spectroscopic Studies of Redox Active Self-Assembled Monolayers on Gold Electrode Surfaces
Technical rept. no. 70, 1989-1990
CASE WESTERN RESERVE UNIV CLEVELAND OH
Pagination or Media Count:
Monolayers of N-ethyl-N-octadecyl-4,4-bipyridinium EOB have been prepared on smooth gold surfaces prepared by spontaneous self-assembly of the electrochemically reduced form of the amphiphile and have been examined with in situ Fourier Transform Infrared Reflection Absorption Spectroscopy FTIRRAS. Prominent positive-going peaks with hardly any detectable negative-going counterparts were observed in the normalized potential difference spectra of the layer in the reduced state using as a reference the spectra for the layer in the fully oxidized state in the region between 1100 and 1700 cm-1. In analogy with a model put forward by other workers it is proposed that the spectral bands originate from vibronically activated totally symmetric modes of EOB in monomeric andor dimeric form.
- Electrical and Electronic Equipment