NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2015, 6 (5), P. 715-725
Cryometry and excess functions of the adduct of light fullerene C60 and arginine – C60(C6H12NaN4O2)8H8 aqueous solutions
M. Yu. Matuzenko – St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia
A. A. Shestopalova – St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia
K. N. Semenov – St. Petersburg State University, St. Petersburg, Russia
N. A. Charykov – St. Petersburg State Electro-technical University (LETI), St. Petersburg; St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia
V. A. Keskinov – St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia; keskinov@mail.ru
Cryometry investigation of C60(C6H12NaN4O2) – H2O solutions was made over concentrations ranging from 0.1 – 10 g of fullerene-arginine adduct per 1 dm3. 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.
Keywords: cryometry, activities, activity coefficients, fullerene-arginine adduct, water solution.
PACS 61.48.+c
DOI 10.17586/2220-8054-2015-6-5-715-725
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