One-step electrochemical modification of carbon nanotubes by ruthenium complexes via new diazonium salts

Bruno Jousselme, Gérard Bidan*, Martial Billon, Cédric Goyer, Yann Kervella, Stéphane Guillerez, Edy Abou Hamad, Christophe Goze-Bac, Jean Yves Mevellec, Serge Lefrant

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

The synthesis of new diazonium salts of bipyridine or terpyridine ruthenium complexes is described. Introduction of a phenyl spacer between a metal ligand and the N2+ group play a key role to stabilize these compounds. Electrochemical experiments performed first on vitreous carbon present the reduction of diazonium ion to a radical and the electrografting of metal complexes on the carbon surface. The films formed on the electrode surface are stable, adherent and electrochemically active (redox polymers). On the basis of these results, diazonium ruthenium complexes have been electropolymerized on carbon nanotubes bucky papers. In spite of the increase in electrical resistance, the analysis of the electrochemical behavior of the modified nanotubes provides evidence of the typical electrochemical signature of metal complexes grafted on the bucky paper, also confirmed with UV-vis and Raman spectroscopies.

Original languageEnglish (US)
Pages (from-to)277-285
Number of pages9
JournalJournal of Electroanalytical Chemistry
Volume621
Issue number2
DOIs
StatePublished - Sep 15 2008
Externally publishedYes

Bibliographical note

Funding Information:
We are indebted to the French Ministry of Research for the financial support, through the Micro and Nanotechnology Program for the post-doctoral grant “RTB: Post CMOS moléculaire 200 mm” assigned to B.J. and the ACI Nacep NR024. We also thank C. Lebrun for her assistance in MS-ESI characterizations.

Keywords

  • Bipyridyl-terpyridyl ruthenium complexes
  • Chemically functionalized carbon nanotube
  • Diazonium salts
  • Electrochemical grafting
  • Modified electrode

ASJC Scopus subject areas

  • Analytical Chemistry
  • General Chemical Engineering
  • Electrochemistry

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