Fullerite with intercalated freon Ch2F2 |
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Authors: | Yu. M. Shul’ga V. M. Martynenko S. A. Baskakov G. V. Shilov E. E. Khorkin T. N. Fursova A. V. Bazhenov A. F. Shestakov Yu. G. Morozov |
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Affiliation: | (1) Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia;(2) Institute of Solid-State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia |
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Abstract: | Fullerite C60 with intercalated CH2F2 (Freon-32) was prepared for the first time. The sample was studied by elemental analysis, X-ray powder diffraction, mass spectrometry, and IR spectroscopy. The composition of the sample was found to be (CH2F2)C60. The sample had a face-centered cubic lattice with the lattice parameter (1.4284 nm) much larger than that of pure fullerite (1.416 nm). The gas released from the sample during heating in a vacuum to 450°C largely consisted of initial Freon (mass spectrometry data); no Freon destruction products were observed at this temperature. The C-F stretching vibration frequency (1058 cm?1) was shifted in (CH2F2)C60 by 30 cm?1 toward lower wave numbers compared with the gas phase. The absorption bands at 1182 and 1428 cm?1 (IR active modes (F 1u ) of high-symmetry (I h ) C60 molecules) did not change their positions in the intercalate. |
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