NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2018, 9 (6), P. 798–810
Antioxidant properties of fullerenol-d
D. P. Tyurin – St. Petersburg State Technological Institute (Technical University), Moskovsky prospect, 26, Saint Petersburg, 190013, Russia
F. S. Kolmogorov – St. Petersburg State Technological Institute (Technical University), Moskovsky prospect, 26, Saint Petersburg, 190013, Russia
I. A. Cherepkova – St. Petersburg State Technological Institute (Technical University), Moskovsky prospect, 26, Saint Petersburg, 190013, Russia
N. A. Charykov – St. Petersburg State Technological Institute (Technical University), Moskovsky prospect, 26, Saint Petersburg, 190013; St. Petersburg Electrotechnical University “LETI”, ul. Professora Popova 5, 197376, Saint Petersburg, Russia
K. N. Semenov – St. Petersburg State Technological Institute (Technical University), Moskovsky prospect, 26, Saint Petersburg, 190013; St. Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg, 199034, Russia
V. A. Keskinov – St. Petersburg State Technological Institute (Technical University), Moskovsky prospect, 26, Saint Petersburg, 190013, Russia; keskinov@mail.ru
N. M. Safyannikov – St. Petersburg Electrotechnical University “LETI”, ul. Professora Popova 5, 197376, Saint Petersburg, Russia
Yu.V. Pukharenko – St.Petersburg State University of Architecture and Civil Engineering (SPSUACE), 2nd Krasnoarmeiskaya St. 4, 190005, Saint Petersburg, Russia
D. G. Letenko – St.Petersburg State University of Architecture and Civil Engineering (SPSUACE), 2nd Krasnoarmeiskaya St. 4, 190005, Saint Petersburg, Russia
T. A. Segeda – D. Serikbayev East Kazakhstan state technical university, A. K. Protozanov Street, 69, Ust-Kamenogorsk city, 070004, The Republic of Kazakhstan
Z. Shaimardanov – D. Serikbayev East Kazakhstan state technical university, A. K. Protozanov Street, 69, Ust-Kamenogorsk city, 070004, The Republic of Kazakhstan
Fullerenol-d C60(OH)22-24 was synthesized by the method of direct heterogeneous oxidation of fullerene C60, dissolved in oxylene, by NaOH, dissolved in water, in the presence of interphase catalyst [t - (C4H9)4 N]OH. Identification of fullerenol-d was provided by: C–H–N elemental analysis, High performance liquid phase chromatography, IR – and Electronic spectroscopy, Massspectrometry. The antioxidant properties of aqueous fullerenol-d solutions were investigated against free radicals, generated by hydrogen peroxide and molecular I2. Measurement of fullerenol antioxidant activity was based on the potentiometric titration of fullerenol solutions by hydrogen peroxide and molecular I2 solutions and vice versa with compact Pt as working electrode. As a comparison, the very popular and strong anti-oxidant – ascorbic acid was used. Pourbaix Diagrams (pH – Eh) for hydrogenoxygen and iodine forms were constructed. Fullerenol-d is a weaker antioxidant than ascorbic acid, but in contrast, fullerenols-d molecules are able to undergo multiply reversible absorption-desorption of some free radicals.
Keywords: fullerenol, antioxidant properties, hydrogen peroxide, iodine, Pourbaix Diagrams, platinum electrode.
PACS 61.48.+c
DOI 10.17586/2220-8054-2018-9-6-798-810