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

被引:131
作者
Adenier, Alain
Barre, Nicole
Cabet-Deliry, Eva
Chausse, Annie
Griveau, Sophie
Mercier, Florence
Pinson, Jean
Vautrin-Ul, Christine
机构
[1] Univ Evry, Lab Anal & Modelisat Biol & Environm, UMR 8587, CNRS,CEA, F-91025 Evry, France
[2] Univ Paris 07, CNRS, UMR 7571, Electrochim Mol Lab, F-75251 Paris 05, France
[3] Alchimer, F-91300 Massy, France
[4] Univ Paris 07, ITODYS, CNRS, UMR 7086, F-75005 Paris, France
关键词
diazonium salts; chemical grafting; metal; carbon; redox reaction;
D O I
10.1016/j.susc.2006.07.061
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:4801 / 4812
页数:12
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