Abstract
For intercalation compounds of fluorinated graphite at 77–300 K, the parameters of the spin Hamiltonian are determined from the angular dependence of the ESR spectra, the NO2 and ClO2 radicals are located, and their mobility at low temperatures is studied. At 77–200 K, vibrational and rotational motions around the oxygen-oxygen axis are defreezed. This is attributed to donor-acceptor interactions between the negatively charged oxygen atoms of NO2 and ClO2 radicals and the positively charged carbon atoms of fluorinated graphite. The calculated activation energies (0.35 kcal/mole for ClO2 and 0.6 kcal/mole for NO2) for defreezing the rotational-vibrational motions of these two radicals are close. Using NO2 radicals as spin probes allowed us to find two types of regions in ICFG, which differ in the rate of NO2 diffusion. These regions are supposed to be the filled and unfilled parts of graphite fluoride layers. It is attempted to explain the low pressure of the saturated vapor of the intercalate over ICFG by the presence of unfilled layers near the boundaries of ICFG flakes.
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Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 39, No. 2, pp. 253–260, March–April, 1998.
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Nadolinnyi, V.A., Makotchenko, V.G. & Danilenko, A.M. ESR study of the structure of intercalation compounds of fluorinated graphite and processes occurring therein using No2 and ClO2 radicals as spin probes. J Struct Chem 39, 204–211 (1998). https://doi.org/10.1007/BF02873619
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DOI: https://doi.org/10.1007/BF02873619