title: One-step double covalent functionalization of reduced graphene oxide with xanthates and peroxides.
abstract: Radical functionalization of reduced graphene oxide has been achieved by reaction with a xanthate in the presence of peroxide as a radical initiator. X-ray photoelectron spectroscopy, bulk elemental analyses, and thermogravimetric analyses showed that the xanthate grafting is covalent and efficient. The synthesis and use of seven xanthates and three peroxides showed that the highest grafting yield is obtained when xanthate and peroxide are introduced in stoichiometric amounts. It also revealed that the peroxide used as radical initiator is grafted at the graphenic surface during the functionalization. The method presented in this contribution therefore allows bifunctionalized reduced graphene oxide samples to be easily obtained in one single step. This method leads to undamaged graphene sheets with higher dispersibility than the pristine sample.
authors.affiliation: Institute of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve (Belgium), Fax: (+32) 10-472330.
authors.forename: Florence
authors.initials: F
authors.lastname: Pennetreau
authors.forename: Olivier
authors.initials: O
authors.lastname: Riant
authors.forename: Sophie
authors.initials: S
authors.lastname: Hermans
keywords: graphene; peroxides; radicals; surface functionalization; xanthates