SELF-ASSEMBLED MONOLAYERS OF CU(II) METALLOSURFACTANTS ON GC AND HOPG

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, mod eled after the metal-binding site of the antibiotic Bleomycin, connect ed to a C-16 aliphatic tail. In the pH range explored, 6.0-7.3, all th e complexes were found to self-assemble on the rough GC surface. Compa rison with similar allowed a quantitative treatment of the data. The d ata fit to the Langmuir isotherm allowed determination of the electrod e surface coverage, Gamma(sat), which was consistent with the formatio n of a monolayer. Preliminary characterization of the structure formed on HOPG by STM confirms the presence of a monolayer.