Properties of C60 polymerized under high pressure and temperature |
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| Authors: | AM Rao PC Eklund UD Venkateswaran J Tucker MA Duncan GM Bendele PW Stephens J-L Hodeau L Marques M Núñez-Regueiro IO Bashkin EG Ponyatovsky AP Morovsky |
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| Institution: | (1) Department of Physics and Astronomy, and Center for Applied Energy Research, University of Kentucky, Lexington, KY 40506, USA (Fax: 001-606/323-2846, E-mail: rao@pop.uky.edu), US;(2) Department of Physics, Oakland University, Rochester, MI 48309, USA, US;(3) Department of Chemistry, University of Georgia, Athens, GA 30602, USA, US;(4) Department of Physics, State University of New York, Stony Brook, NY 11794, USA, US;(5) Laboratoire de Crystallographie, C. N. R. S., BP166 Cedex 09, 38042 Grenoble, France, FR;(6) EPM-Matformag, C. N. R. S., BP166 Cedex 09, Grenoble, France, FR;(7) Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow region, Russia, RU;(8) Institute of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow region, Russia, RU |
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| Abstract: | 60 polymers. Pure and mixed phase polymeric samples were synthesized by simultaneously subjecting microcrystalline C60 powder or pellets to various pressures () and temperatures (). The optical spectra of the orthorhombic, tetragonal, and rhombohedral C60 polymer phases are observed to be quite distinct and rich. These spectra exhibit numerous lines and an overall downshift
in frequency relative to C60 is observed, consistent with a loss of double bonds from the fullerene cage. The LDMS spectra of a sample synthesized at
under hydrostatic conditions and , exhibited a succession of clear peaks at mass numbers corresponding to , similar to the LDMS data on the C60 photopolymer. This is taken as further evidence for interfullerene bonds in these high-pressure polymers. The XRD pattern
of this sample indicates the presence of a strong texture in the sample.
Received: 14 November 1996/Accepted: 8 January 1997 |
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| Keywords: | PACS: 61 46 +w 62 50 +p 78 30 -j |
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