Nafion - Tris(2-2'-bipyridyl)ruthenium(II) ultrathin Langmuir - Schaefer films: redox catalysis and electrochemiluminescent properties

Paolo Bertoncello, Lynn Dennany, Robert J. Forster, Patrick R. Unwin

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

A simple procedure to incorporate tris(2-2'-bipyridyl)ruthenium(II), [Ru(bPY)(3)](2+), into Nafion Langmuir-Schaefer (LS) films is described. Nafion LS films (tens of nanometers thick) were formed on quartz glass and indium tin oxide (ITO) directly from Nafion-[Ru(bPY)(3)](2+) Langmuir films assembled at the water-air interface. This procedure allowed the direct incorporation of [Ru(bPY)(3)](2+) into Nafion films without the need for subsequent loading. UV-vis spectroscopy confirmed the successful incorporation of [Ru(bPY)(3)](2+) within the LS films and showed that the amount of [Ru(bPY)(3)](2+) immobilized in this way scaled with film thickness. Voltammetric studies on ITO-modified electrodes confirmed the successful incorporation of [Ru(bPY)(3)](2+) and demonstrated that [Ru(bPY)(3)](2+) was retained within the ultrathin films over a long time scale. These electrodes were tested for the electrocatalytic reduction of tripropylamine. Significant catalysis was observed due to the rapid turnover of [Ru(bPY)(3)](2+/3+) between the electrode surface and outer boundary of the film, as a direct consequence of the ultrathin film dimensions. Concomitant electrochemiluminescence (ECL) was demonstrated highlighting the potential of this material for sensing applications.

LanguageEnglish
Pages7549-7553
Number of pages5
JournalAnalytical Chemistry
Volume79
Issue number19
DOIs
Publication statusPublished - 1 Oct 2007

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Ultrathin films
Langmuir Blodgett films
Catalysis
Electrodes
Quartz
Ultraviolet spectroscopy
Film thickness
Glass
Oxidation-Reduction
tris(2,2'-bipyridyl)ruthenium(II)
perfluorosulfonic acid
Water
Air
indium tin oxide

Keywords

  • scanning electrochemical microscopy
  • electrogenerated chemiluminescence
  • polymer films
  • electrode surfaces
  • flowing streams
  • monolayers
  • nanoparticles
  • voltammetry

Cite this

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abstract = "A simple procedure to incorporate tris(2-2'-bipyridyl)ruthenium(II), [Ru(bPY)(3)](2+), into Nafion Langmuir-Schaefer (LS) films is described. Nafion LS films (tens of nanometers thick) were formed on quartz glass and indium tin oxide (ITO) directly from Nafion-[Ru(bPY)(3)](2+) Langmuir films assembled at the water-air interface. This procedure allowed the direct incorporation of [Ru(bPY)(3)](2+) into Nafion films without the need for subsequent loading. UV-vis spectroscopy confirmed the successful incorporation of [Ru(bPY)(3)](2+) within the LS films and showed that the amount of [Ru(bPY)(3)](2+) immobilized in this way scaled with film thickness. Voltammetric studies on ITO-modified electrodes confirmed the successful incorporation of [Ru(bPY)(3)](2+) and demonstrated that [Ru(bPY)(3)](2+) was retained within the ultrathin films over a long time scale. These electrodes were tested for the electrocatalytic reduction of tripropylamine. Significant catalysis was observed due to the rapid turnover of [Ru(bPY)(3)](2+/3+) between the electrode surface and outer boundary of the film, as a direct consequence of the ultrathin film dimensions. Concomitant electrochemiluminescence (ECL) was demonstrated highlighting the potential of this material for sensing applications.",
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Nafion - Tris(2-2'-bipyridyl)ruthenium(II) ultrathin Langmuir - Schaefer films: redox catalysis and electrochemiluminescent properties. / Bertoncello, Paolo; Dennany, Lynn; Forster, Robert J.; Unwin, Patrick R.

In: Analytical Chemistry, Vol. 79, No. 19, 01.10.2007, p. 7549-7553.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Nafion - Tris(2-2'-bipyridyl)ruthenium(II) ultrathin Langmuir - Schaefer films: redox catalysis and electrochemiluminescent properties

AU - Bertoncello, Paolo

AU - Dennany, Lynn

AU - Forster, Robert J.

AU - Unwin, Patrick R.

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Y1 - 2007/10/1

N2 - A simple procedure to incorporate tris(2-2'-bipyridyl)ruthenium(II), [Ru(bPY)(3)](2+), into Nafion Langmuir-Schaefer (LS) films is described. Nafion LS films (tens of nanometers thick) were formed on quartz glass and indium tin oxide (ITO) directly from Nafion-[Ru(bPY)(3)](2+) Langmuir films assembled at the water-air interface. This procedure allowed the direct incorporation of [Ru(bPY)(3)](2+) into Nafion films without the need for subsequent loading. UV-vis spectroscopy confirmed the successful incorporation of [Ru(bPY)(3)](2+) within the LS films and showed that the amount of [Ru(bPY)(3)](2+) immobilized in this way scaled with film thickness. Voltammetric studies on ITO-modified electrodes confirmed the successful incorporation of [Ru(bPY)(3)](2+) and demonstrated that [Ru(bPY)(3)](2+) was retained within the ultrathin films over a long time scale. These electrodes were tested for the electrocatalytic reduction of tripropylamine. Significant catalysis was observed due to the rapid turnover of [Ru(bPY)(3)](2+/3+) between the electrode surface and outer boundary of the film, as a direct consequence of the ultrathin film dimensions. Concomitant electrochemiluminescence (ECL) was demonstrated highlighting the potential of this material for sensing applications.

AB - A simple procedure to incorporate tris(2-2'-bipyridyl)ruthenium(II), [Ru(bPY)(3)](2+), into Nafion Langmuir-Schaefer (LS) films is described. Nafion LS films (tens of nanometers thick) were formed on quartz glass and indium tin oxide (ITO) directly from Nafion-[Ru(bPY)(3)](2+) Langmuir films assembled at the water-air interface. This procedure allowed the direct incorporation of [Ru(bPY)(3)](2+) into Nafion films without the need for subsequent loading. UV-vis spectroscopy confirmed the successful incorporation of [Ru(bPY)(3)](2+) within the LS films and showed that the amount of [Ru(bPY)(3)](2+) immobilized in this way scaled with film thickness. Voltammetric studies on ITO-modified electrodes confirmed the successful incorporation of [Ru(bPY)(3)](2+) and demonstrated that [Ru(bPY)(3)](2+) was retained within the ultrathin films over a long time scale. These electrodes were tested for the electrocatalytic reduction of tripropylamine. Significant catalysis was observed due to the rapid turnover of [Ru(bPY)(3)](2+/3+) between the electrode surface and outer boundary of the film, as a direct consequence of the ultrathin film dimensions. Concomitant electrochemiluminescence (ECL) was demonstrated highlighting the potential of this material for sensing applications.

KW - scanning electrochemical microscopy

KW - electrogenerated chemiluminescence

KW - polymer films

KW - electrode surfaces

KW - flowing streams

KW - monolayers

KW - nanoparticles

KW - voltammetry

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JO - Analytical Chemistry

T2 - Analytical Chemistry

JF - Analytical Chemistry

SN - 0003-2700

IS - 19

ER -