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 language | English (US) |
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Pages (from-to) | 277-285 |
Number of pages | 9 |
Journal | Journal of Electroanalytical Chemistry |
Volume | 621 |
Issue number | 2 |
DOIs | |
State | Published - Sep 15 2008 |
Externally published | Yes |
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