Light fullerene poly-nitro-adduct C$_{60}$(NO$_2$)$_{18}$(OH)$_2$

By direct heterogeneous non-catalytic nitration of fullerene C$_{60}$ with a mixture of concentrated nitric and sulfuric acids was synthesized poly-nitro-adduct C$_{60}$(NO$_2$)$_{18}$(OH)$_2$. Excess of nitric acid from the reaction mixture was removed by treatment with hydrogen peroxide, and sulfuric acid - by dialysis from aqueous solutions. The identification of the poly-nitro-adduct was carried out using the following methods: elemental C–H–N analysis, energy dispersion spectral microanalysis, infrared spectroscopy, and nuclear magnetic resonance, high-performance liquid chromatography, thermo-gravimetric analysis.