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Etude de la chimie de la fonctionnalisation de l'oxyde de graphène pour concevoir des matériaux à base de l'oxyde de graphène pour des applications antibactériennes

Abstract : Graphene oxide (GO) is a carbon nanostructure that has attracted a great interest due to its great surface area, chemical versatility but also, GO exhibits interesting optical, electrical, and thermal properties. The chemical functionalization of GO is a critical step to develop multi-functionalized materials for a wide range of applications. However, the complex and wide chemistry of GO is a drawback during the functionalization, due to different functional groups can react simultaneously, wasting the possibility to multi-functionalize the GO. Generally, GO functionalization has been carried out on epoxide and carboxylic acid groups since they constitute the strongest concentration in GO layers, and because the chemistry of epoxides and carboxylic acids is well-known. Nonetheless, both functional groups can react simultaneously with a nucleophile in the reaction losing orthogonality during the functionalization. Alternatively, alkene groups arise in the graphitic lattice leading during the graphite oxidation. This last functional group has been tried to explore but with disadvantage of using extreme conditions leading to GO reduction. Since GO has been used as a platform for a wide range of molecules, it is necessary to explore the chemistry of the GO to take full advantage of its functional groups. Therefore, different strategies must be studied to create multi-functionalized graphene materials which can increase the range of possible applications. Motivated by this idea, this thesis brings insights and better understandings in the chemical functionalization of GO, focusing on the epoxides, carboxylic acids, and alkene groups. By exploring new pathways for the GO functionalization, it would be possible to create GO materials with dual functionalization that can improve its performance for a wide range of applications. Through the chemical routes generated in this thesis, it was developed the first attempts of novel multi-functionalized graphene oxide materials containing positive charges to improve the antibacterial performance of pristine GO.
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Submitted on : Friday, April 29, 2022 - 3:38:10 PM
Last modification on : Saturday, April 30, 2022 - 3:36:48 AM
Long-term archiving on: : Saturday, July 30, 2022 - 6:53:49 PM


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Alexis Pineiro Garcia. Etude de la chimie de la fonctionnalisation de l'oxyde de graphène pour concevoir des matériaux à base de l'oxyde de graphène pour des applications antibactériennes. Chimie organique. Université Paris sciences et lettres; Instituto Tecnológico de Celaya, 2021. Français. ⟨NNT : 2021UPSLC001⟩. ⟨tel-03655474⟩



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