Concentration dependence of electric conductivity and ph for aqueous solutions of watersoluble light fullerene – C$_{60}$ [= C(COOH)$_{2}$]$_{3}$ trismalonate

K. N. Semenov^a, N. A. Charykov^bc, A. S. Kritchenkov^a, I. A. Cherepkova^b, O. S. Manyakina^b, D. P. Tyurin^b, A. A. Shestopalova^b, V. A. Keskinov^b, E. A. Kulenova^d, K. V. Ivanova^b, N. M. Ivanova^a, D. G. Letenko^e, V. A. Nikitin^f, E. L. Fokina<sup>a

a</sup> St. Petersburg State University, Saint-Petersburg, Russia
^b St. Petersburg State Technological Institute (Technical University), Saint-Petersburg, Russia
^c St. Petersburg State Electro-Technical University (LETI), Saint-Petersburg, Russia
^d D. Serikbayev East-Kazakhstan state technical university, Ust-Kamenogorsk, Kazakhstan
^e St. Petersburg State University Architecture Academy, Saint-Petersburg, Russia
^f St. Petersburg State Technical University, Saint-Petersburg, Russia

Аннотация: Studies of the concentration dependence of electric conductivity and pH for aqueous solutions of the light fullerene – C$_{60}$ [= C(COOH)$_{2}$]$_{3}$ trismalonate were performed at 25$^\circ$C. From both data (from the equivalent electric conductivity and pH), the apparent degree of dissociation and concentration dissociation constants of C$_{60}$ [= C(COOH)$_{2}$]$_{3}$ in aqueous solutions were calculated. Thermodynamic dissociation constants of C$_{60}$ [= C(COOH)$_{2}$]$_{3}$ in aqueous solutions, calculated for infinitely dilute solutions by the both methods, were reasonably similar.

Ключевые слова: tris-malonate of light fullerene, electric conductivity.

PACS: 61.48.+c

Поступила в редакцию: 20.03.2014

Язык публикации: английский

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