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

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

doi:10.1021/la960052v

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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11 Scopus citations

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, Γ_sat, 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)
Pages (from-to)	3695-3701
Number of pages	7
Journal	Langmuir
Volume	12
Issue number	15
DOIs	https://doi.org/10.1021/la960052v
State	Published - Jul 24 1996
Externally published	Yes

ASJC Scopus subject areas

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

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10.1021/la960052v

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title = "Self-assembled monolayers of Cu(II) metallosurfactants on GC and HOPG",

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.",

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AU - Ghirlanda, Giovanna

AU - Scrimin, Paolo

AU - Kaifer, Angel E.

AU - Echegoyen, Luis A.

PY - 1996/7/24

Y1 - 1996/7/24

N2 - 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.

AB - 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.

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

Abstract

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