Self-assembled monolayers of Cu(II) metallosurfactants on GC and HOPG

Giovanna Ghirlanda, Paolo Scrimin, Angel E. Kaifer, Luis A. Echegoyen

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13 Citations (Scopus)

Abstract

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 languageEnglish
Pages (from-to)3695-3701
Number of pages7
JournalLangmuir
Volume12
Issue number15
Publication statusPublished - Jul 24 1996

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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    Ghirlanda, G., Scrimin, P., Kaifer, A. E., & Echegoyen, L. A. (1996). Self-assembled monolayers of Cu(II) metallosurfactants on GC and HOPG. Langmuir, 12(15), 3695-3701.