Edge-Functionalization of Pyrene as a Miniature Graphene via Friedel–Crafts Acylation Reaction in Poly(Phosphoric Acid)
Interdisciplinary School of Green Energy, Institute of Advanced Materials & Devices, Ulsan National Institute of Science and Technology (UNIST), 100, Banyeon, Ulsan, 689-798, South Korea
Nanoscale Research Letters 2010, 5:1686-1691 doi:10.1007/s11671-010-9697-8Published: 15 July 2010
The feasibility of edge-functionalization of graphite was tested via the model reaction between pyrene and 4-(2,4,6-trimethylphenyloxy)benzamide (TMPBA) in poly(phosphoric acid) (PPA)/phosphorous pentoxide (P2O5) medium. The functionalization was confirmed by various characterization techniques. On the basis of the model study, the reaction condition could be extended to the edge-functionalization of graphite with TMPBA. Preliminary results showed that the resultant TMPBA-grafted graphite (graphite-g-TMPBA) was found to be readily dispersible in N-methyl-2-pyrrolidone (NMP) and can be used as a precursor for edge-functionalized graphene (EFG).