Publication
531
J. Am.
Chem. Soc., 123 (19),
4541 -4549, 2001
DOI: 10.1021/ja003276f S0002-7863(00)03276-5 |
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Covalent Modification of Iron Surfaces by Electrochemical Reduction
of Aryldiazonium Salts
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Alain Adenier, Marie-Claude Bernard, Mohamed M. Chehimi, Eva Cabet-Deliry, Bernard Desbat,, Olivier Fagebaume,
Jean Pinson, Fetah Podvorica
Contribution from the Laboratoire d'Electrochimie Moléculaire de l'Université Paris 7, Unité Mixte de
Recherche Université-CNRS No. 7591, Université Paris7-Denis Diderot, 2 Place Jussieu, F-75251,
Paris Cedex 05, France, ITODYS, Université Paris 7-Denis Diderot, associé au CNRS (UPRESA 7086),
1 rue Guy de la Brosse, F-75005, Paris, France, the Laboratoire de Physico-Chimie Moléculaire
Université Bordeaux 1, Unité Mixte de Recherche Université-CNRS No. 5803, Université Bordeaux 1, 351
cours de la Libération, F-33405, Talence Cedex Cedex, France, and the Laboratoire de Physique des
Liquides et Electrochimie, UPR 15CNRS, Conventionné avec l'Université Pierre et Marie Curie,
4 Place Jussieu, F-75004, Paris, France
Electrochemical reduction of aryldiazonium salts
(in acetonitrile or acidic aqueous medium) on
an
iron or mild steel surface permits the strong
bonding (which resists an ultrasonic cleaning)
of aryl groups on
these surfaces. Attachment of aryl groups was
demonstrated by the combined used of electrochemistry,
infrared
spectroscopy and polarization modulation infrared
reflection spectroscopy (PMIRRAS), Rutherford
backscattering, X-ray photoelectron spectroscopy,
and capacity measurements. The substituents of
aryl groups, which
can be widely varied, include NO2,
I, COOH, and long alkyl chains. It is shown that
the attachment of the aryl
groups is to an iron and not to an oxygen atom
and that the bond is covalent. |
