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Laboratoire d'Electrochimie Moleculaire, LEM, Paris

UMR CNRS - Université Paris Diderot - Paris France

   
 
Master Frontiers in Chemistry | UFR de Chimie - Université Paris Diderot - Paris 7 CNRS - Institut de chimie Université de Paris Master Chimie Sorbonne Paris Cité UFR de Chimie - Université Paris Diderot - Paris 7 CNRS - Institut de chimie
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Université Paris Diderot
Université de Paris CNRS, Centre National de la Recherche Scientifique
 
 


Le LEM - Publications: Abstracts

Publication 610

Surface Science. , 600 , 4801 - 4812, 2006.
DOI: 10.1016/j.susc.2006.07.061
 

Study of the spontaneous formation of organic layers on carbon and metal surfaces from diazonium salts

 
 
Alain Adenier, Nicole Barré, Eva Cabet-Deliry, Annie Chaussé, Sophie Griveau, Florence Mercier, Jean Pinson and Christine Vautrin-Ul

LaLaboratoire Analyses et Modélisation pour le Biologie et l'Environnement UMR 8587,Université d'Evry, Val d'Essonne-CNRS-CEA, 1 rue du Père Jarland, F-91025 Evry Cedex, France, Laboratoire d'Electrochimie Moléculaire, UMR 7591, Université Paris 7-CNRS, 2 place Jussieu, F-75251 Paris Cedex 05, France, Alchimer, 15 rue du Buisson aux Fraises, F-91300 Massy, France, ITODYS, Université Paris 7 Denis Diderot, associé au CNRS (UMR 7086), 1 rue Guy de La Brosse, F-75005 Paris, France

 


This study investigates the spontaneous grafting of different para-substituted phenyl groups on carbon and metallic surfaces from diazonium salts solutions. Glassy carbon, nickel, zinc and iron plates were allowed to react with an acetonitrile solution of aryldiazonium tetrafluoroborate salt by simple dipping. The surfaces were characterized before and after their immersion by XPS and AFM to evidence the formation of a coating on the different materials. The results are indicative of the presence of substituted phenyl groups on all the investigated surfaces. This study also aims at correlating grafting efficiency with metal reactivities and diazonium salt electronic properties by means of AFM and FT-IRRAS. For this purpose, zinc and nickel were chosen due to their opposite reducing properties and two diazonium salts were selected with electron-donor or -withdrawing para-substituents. The results tend to indicate that redox properties of both partners (diazonium + metal) are of prime importance for grafting to occur.
 
   
 
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