Table of Contents
ISRN Organic Chemistry
Volume 2013, Article ID 656185, 7 pages
Research Article

Noncovalent Functionalization of Graphene in Suspension

1Department of Chemistry-BMC, Uppsala University, P.O. Box 576, 751 23 Uppsala, Sweden
2Department of Engineering Sciences, Electron Microscopy and Nanoengineering, Uppsala University, P.O. Box 534, 751 21 Uppsala, Sweden

Received 31 January 2013; Accepted 3 March 2013

Academic Editors: J. Drabowicz, N. Fujita, G. Giambastiani, and A. Hajra

Copyright © 2013 Wenzhi Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Suspensions of graphene, prepared from graphite foil by sonochemical exfoliation, have been treated with new nonpolar pyrenebutyric amides. The assemblies, in suspension and after deposition on solid supports, were characterized by NMR, absorption, and fluorescence spectroscopy and by transmission electron microscopy, where the well-defined shape and size of an appended [60]fulleropyrrolidine unit facilitates TEM detection of the nonstationary molecules. The accumulated evidence, also including direct comparisons of carbon nanotubes treated with pyrene amides under the same conditions, proves the successful noncovalent functionalization of graphene suspended in non-polar solvent with non-polar pyrene derivatives.