Cryometry and excess functions of the adduct of light fullerene C$_{60}$ and arginine – C$_{60}$(C$_{6}$H$_{12}$NaN$_{4}$O$_{2}$)$_8$ H$_8$ aqueous solutions

Cryometry investigation of C$_{60}$(C$_{6}$H$_{12}$NaN$_{4}$O$_{2}$)$_8$ H$_8$ – H$_{2}$O solutions was made over concentrations ranging from 0.1– 10 g of fullerene-arginine adduct per 1 dm$^{3}$. Freezing point depression was measured for these aqueous solutions. Excess functions for water and fullerene-arginine adduct activities, activity coefficients and excess Gibbs energy of the solutions were calculated. All solutions demonstrate huge deviations from ideality. The last fact, to our opinion, is caused by the very specific– hierarchical type of association of fullerene-arginine adducts in aqueous solution components, which is proved by the results of our visible light scattering analysis.