Journal of the Brazilian Chemical Society
On-line version ISSN 1678-4790
ALVES, Gustavo Catão et al. Synthesis of C60(OH)18-20 in aqueous alkaline solution under O2-atmosphere. J. Braz. Chem. Soc. [online]. 2006, vol.17, n.6, pp.1186-1190. ISSN 1678-4790. http://dx.doi.org/10.1590/S0103-50532006000600017.
In this work we report on an alternative synthesis of water-soluble fullerenes known as fullerols, aiming for biomedical applications. The synthesis is based on a process in which polyethylene glycol (PEG400) is used as phase-transfer catalyst between fullerene/benzene and aqueous NaOH solutions. The polyhydroxylation of the fullerenes occurs in the NaOH solution under a continuous flow of O2 to enhance the reaction yield. The resulting compound was characterized with infrared spectroscopy, nuclear magnetic resonance, thermo-gravimetric analysis and optical absorption. The formation of C60(OH)18-20 in high yields was confirmed.
Keywords : fullerene; fullerol; polyhydroxylation; FTIR; NMR; TG.