Accession Number:

ADA235564

Title:

In-Situ Spectroscopic Studies of Redox Active Self-Assembled Monolayers on Gold Electrode Surfaces

Descriptive Note:

Technical rept. no. 70, 1989-1990

Corporate Author:

CASE WESTERN RESERVE UNIV CLEVELAND OH

Personal Author(s):

• Bae, I.
• Huang, H.
• Yeager, E.
• Scherson, D. A.

Report Date:

1990-10-30

Pagination or Media Count:

23.0

Abstract:

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.

Descriptors:

• *SPECTROSCOPY
• SURFACES
• SPECTRA
• BAND SPECTRA
• ELECTRODES
• SYMMETRY
• GOLD
• REDUCTION
• OXIDATION

Subject Categories:

• Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE