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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2015, 6 (5), P. 704–714

Cryometry and excess functions of fullerenols and trismalonates of light fullerenes – C60(OH) and C70[=C(COOH)2]3 aqueous solutions

M.Yu. Matuzenko – St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia
D. P. Tyurin – St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia
O. S. Manyakina – 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
K. V. Ivanova – St. Petersburg State University, St. Petersburg, Russia
V. A. Keskinov – St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia; keskinov@mail.ru

Cryometry investigations of the C60(OH)24±2 – H2O and C70[=C(COOH)2]3 – H2O binary systems were conducted over the 0.1 – 10 g concentration range of fullerenols per 1 dm3 of solutions. The decreases of the temperatures at the onset of H2O – ice crystallization were determined. Excess functions of aqueous solutions – water and fullerenols (trismalonates) activities and activity coefficients and excess Gibbs energy of the solutions were calculated. All solutions demonstrated huge deviations from those of ideal solutions. The last fact, to our opinion, is caused by a very specific – hierarchical type of association of fullerenols (trismalonates) solution components, which was proved by the results of visible light scattering analysis.

Keywords: Cryometry, activities, activity coefficients, fullerenols, trismalonates, water solution.

PACS 61.48.-c

DOI 10.17586/2220-8054-2015-6-5-704-714

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