title: Functionalization of Hydrogenated Graphene: Transition-Metal-Catalyzed Cross-Coupling Reactions of Allylic C-H Bonds.
abstract: The chemical functionalization of hydrogenated graphene can modify its physical properties and lead to better processability. Herein, we describe the chemical functionalization of hydrogenated graphene through a dehydrogenative cross-coupling reaction between an allylic C-H bond and the α-C-H bond of tetrahydrothiophen-3-one using Cu(OTf)2 as the catalyst and DDQ as the oxidant. The chemical functionalization was confirmed by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy and visualized by scanning electron microscopy. The functionalized hydrogenated graphene material demonstrated improved dispersion stability in water, bringing new quality to the elusive hydrogenated graphene (graphane) materials. Hydrogenated graphene provides broad possibilities for chemical modifications owing to its reactivity.
authors: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Science, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.
authors: Chun Kiang
authors: CK
authors: Chua
authors: University of Chemistry and Technology Prague, Department of Inorganic Chemistry, Technická 5, 166 28, Prague 6, Czech Republic.
authors: Zdeněk
authors: Z
authors: Sofer
authors: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Science, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore. pumera.research@gmail.com.
authors: Martin
authors: M
authors: Pumera
keywords: cross-coupling; graphene; heterogeneous catalysis; hydrogenated graphene; transition metals