Dimerized Pi-Complexes in Self Assembled Monolayers Containing Viologens. An Origin of Unusual Waveshapes in the Voltammetry of Monolayers.
Abstract
Thiol derivatives of viologens self-assemble at gold and silver electrodes to give monolayers with relatively high surface coverages. Lateral interaction of the viologen redox groups in these monolayers is revealed by virtue of the formation of unique pi-complex diners (pi-mers) for the one-electron reduced form of viologens within these monolayers. The presence of these pi-mers is shown to give double-peaked voltammetric waves, and is unambiguously observed in the surface Raman (including SRRS, SERS and SERRS) spectra of these monolayers. The Raman bands due exclusively to the pi-mer as previously reported are assigned to the out-of-phase coupling nodes of the totally symmetric ring modes of the component cation radicals in the pi-mer. jg p.1
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 08, 1994
- Accession Number
- ADA301971
Entities
People
- Daniel A. Buttry
- Xiaoyan Tang
Organizations
- University of Wyoming