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Mchedlov-Petrossyan NO, Kamneva NN, Al-Shuuchi YT, et al. Towards better understanding of C60 organosols. Phys Chem Chem Phys. 2016;18(4):2517-26doi: 10.1039/c5cp06806a.
Mchedlov-Petrossyan, N. O., Kamneva, N. N., Al-Shuuchi, Y. T., Marynin, A. I., Zozulia, O. S., Kryshtal, A. P., Klochkov, V. K., & Shekhovtsov, S. V. (2016). Towards better understanding of C60 organosols. Physical chemistry chemical physics : PCCP, 18(4), 2517-26. https://doi.org/10.1039/c5cp06806a
Mchedlov-Petrossyan, Nikolay O, et al. "Towards better understanding of C60 organosols." Physical chemistry chemical physics : PCCP vol. 18,4 (2016): 2517-26. doi: https://doi.org/10.1039/c5cp06806a
Mchedlov-Petrossyan NO, Kamneva NN, Al-Shuuchi YT, Marynin AI, Zozulia OS, Kryshtal AP, Klochkov VK, Shekhovtsov SV. Towards better understanding of C60 organosols. Phys Chem Chem Phys. 2016 Jan 28;18(4):2517-26. doi: 10.1039/c5cp06806a. PMID: 26699398.
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Phys Chem Chem Phys. 2016 Jan 28;18(4):2517-26. doi: 10.1039/c5cp06806a.

Towards better understanding of C60 organosols.

Physical chemistry chemical physics : PCCP

Nikolay O Mchedlov-Petrossyan, Nika N Kamneva, Younis T M Al-Shuuchi, Andriy I Marynin, Olexii S Zozulia, Alexander P Kryshtal, Vladimir K Klochkov, Sergey V Shekhovtsov

Affiliations

  1. Department of Physical Chemistry, V. N. Karazin National University, 61022, Kharkov, Ukraine. [email protected].
  2. National University of Food Technologies, Volodymyrska, 68, Kiev, 01601, Ukraine.
  3. Friedrich-Alexander University, Department of Chemistry and Pharmacy, Erlangen-Nürnberg, Germany.
  4. Department of Physics and Technology, V. N. Karazin National University, Kharkov, 61022, Ukraine.
  5. Institute for Scintillation Materials NAS of Ukraine, 61001 Kharkov, Ukraine.

PMID: 26699398 DOI: 10.1039/c5cp06806a

Abstract

It is of common knowledge that fullerenes form colloids in polar solvents. However, the coagulation via electrolytes and the origin of the negative charge of species are still unexplored. Using a 'radical scavenger' and electrospray ionization spectroscopy (ESI), we proved the formation of ion-radical C60˙(-) and its (probable) transformation into C60(2-) or (C60)2(2-). The coagulation of C60 organosols by NaClO4 and other perchlorates and nitrates in acetonitrile and its mixture with benzene obeys the Schulze-Hardy rule. At higher Ca(ClO4)2 and La(ClO4)3 concentrations, instead of coagulation, stable re-charged colloidal particles appeared, up to a zeta-potential of +(20-42) mV, as compared with -(33-35) mV of the initial organosols. The influence of both HClO4 and CF3SO3H was similar. This phenomenon is attributed to poor solvation of inorganic cations in cationo- and protophobic acetonitrile, which was proven using [2.2.2] cryptand. Further increasing the concentration of Ca(ClO4)2 led again to coagulation, thus demonstrating a novel type of 'coagulation zones'.

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