The aggregation properties of a series of three amphiphilic copper(II) complexes on a glassy carbon (GC) electrode were examined by means of cyclic voltammetry (CV) and Osteryoung square wave voltammetry (OSWV). The complexes examined consisted of a copper-binding polar head, modeled after the metal-binding site of the antibiotic Bleomycin, connected to a C16 aliphatic tail. In the pH range explored, 6.0-7.3, all the complexes were found to self-assemble on the rough GC surface. Comparison with similar behavior observed on highly oriented pyrolytic graphite (HOPG) for one of the complexes (L1-Cu(II)) allowed a quantitative treatment of the data. The data fit to the Langmuir isotherm allowed determination of the electrode surface coverage, Γsat, which was consistent with the formation of a monolayer. Preliminary characterization of the structure formed on HOPG by STM confirms the presence of a monolayer.
|Original language||English (US)|
|Number of pages||7|
|State||Published - Jul 24 1996|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Surfaces and Interfaces