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Contrôle de la fonctionnalisation par réduction des sels de diazonium via le piégeage radicalaire

Abstract : The surface functionalization by diazonium salt reduction is a powerful grafting method. However, despite that this approach allows the preparation of robust materials, it leads to thick and unorganized organic films. In this context, we have developped a method allowing the grafting control in order to obtain films having controlled thickness. Based on the use of radical scavengers, this method gives access to monolayer formations on carbon substrates. The control strategy was then exploited to selectively block the radical grafting mechanism and allows to assess the role of non-radical mechanisms in the process. This study provided a better understanding of the layer growth, highlighting the impact of precursor substituent.This knowledge has been used to elaborate a multifunctional platform monolayer. The establishment of sutructure/properties relathionships revealed better performances for electronic transfert and electrocatalysis. Finally, the control method was transposed to the spontaneous grafting and gives similar results than those obtained for the electrochemical one. This approach was validated by the performance optimization of supercapacitor made of carbon powder.
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Submitted on : Wednesday, January 22, 2020 - 11:41:09 AM
Last modification on : Tuesday, April 7, 2020 - 2:18:03 PM
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  • HAL Id : tel-02448351, version 1


Thibaud Menanteau. Contrôle de la fonctionnalisation par réduction des sels de diazonium via le piégeage radicalaire. Chimie théorique et/ou physique. Université d'Angers, 2016. Français. ⟨NNT : 2016ANGE0059⟩. ⟨tel-02448351⟩



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