Xanthates as a tool for carbon nanotube and graphene functionalization : application in supported catalysis
(2016)
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- Abstract
- The aim of this PhD thesis was the use of xanthate compounds to functionalize nanocarbonaceous materials in order to use them as support in homogeneous supported catalysis. The first part of this work was devoted to the study of the xanthate reactivity towards various types of nanocarbons: carbon nanotubes, reduced graphene oxide and magnetic carbon nanotubes. X-ray photoelectron spectroscopy, bulk elemental analysis, thermogravimetric analysis and Raman spectroscopy results have shown that a reaction between xanthate fragments and the sp2-skeleton of nanocarbons, when initiated by thermally decomposed peroxides, actually took place. The combination of results given by all these characterization techniques also revealed that fragments arising from the radical initiator were grafted at the nanocarbon surface along with xanthate fragments. The developed methodology was therefore redefined as a one-step double functionalization reaction. The second main part of this PhD thesis was dedicated to the study of post-functionalization reactions, performed using heterogeneized xanthate fragments as reactant. Various post-functionalization reactions such as amidation reaction, double Zard addition and anchoring of gold and platinum nanoparticles have successfully been performed at the functionalized nanocarbon surface, showing that the heterogeneization of these functions does not change their chemical nature or reactivity. As a consequence, we took benefit from the possible post-functionalization reactions to anchor different ligands at carbon nanotube surface. The last part of this manuscript was dedicated to the description of the preparation of supported catalysts and their use in the Suzuki-Miyaura cross-coupling reaction.
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Citations
Pennetreau, F. (2016). Xanthates as a tool for carbon nanotube and graphene functionalization : application in supported catalysis. https://hdl.handle.net/2078.5/108705