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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 …
American Scientific Publishers
Publication date: 
1 Feb 2018

Zhenyuan Xia, Ryota Kabe, Andrea Liscio, Alessandro Kovtun, Emanuele Treossi, Xinliang Feng, Vincenzo Palermo

Biblio References: 
Volume: 18 Issue: 2 Pages: 1290-1295
Journal of nanoscience and nanotechnology