Graphene-Pyrene Nanocomposites Obtained Using Azide Chemistry
In this study we describe a simple and fast procedure for the covalent functionalization of pristine graphene with a pyrene-terminated alkylazide, transformed in a highly reactive radical by thermal activation. The functionalized graphene sheets showed enhanced dispersibility in organic
solvents compared to the pristine ones, thus enhancing their solution processability and compatibility with solvents or polymers. The relative improvement of solubility estimated form the absorption spectra was ≈60% in CHCl3 and ≈1200% in THF. The obtained materials were characterized
by optical absorption spectroscopy, photoemission spectroscopy, infrared spectroscopy and X-rays photoelectron spectroscopy. The presence of the pyrene photoemitting chromophore in the grafting unit allowed to monitor the successful grafting and to confirm the effectiveness of the alkylazide
to improve graphene solubility even when present in small amounts on the graphene surface.
Keywords: Azide Chemistry; Dispersibility; Graphene; Nanocomposites; Pyrene
Document Type: Research Article
Affiliations: 1: Institute for Organic Synthesis and Photoreactivity-ISOF, National Research Council, via Gobetti 101, 40129 Bologna, Italy 2: Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
Publication date: 01 February 2018
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