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Polymeric fullerenes: from C60 to C70
Umeå University, Faculty of Science and Technology, Physics.
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1999 (English)In: AIP Conference Proceedings vol. 486: Electronic Properties of Novel materials - Science and Technology of Molecular Nanostructures: Proceedings of the XIII Winter School on Electronic Properties of Novel Materials, Kirchberg 1999, Melville, NY: American Institute of Physics (AIP) , 1999, 12-15 p.Conference paper, Published paper (Refereed)
Abstract [en]

For the first time polymerization of both powder and single crystals of C70 fullerene was established after their subjection to high pressure (1.1 - 2 GPa) at elevated temperature (500 - 580 K). High-resolution capacitance dilatometry, FTIR/Raman spectroscopy and thermal conductivity were employed to characterise the polymeric phase of C70. The results demonstrate drastic changes in the physical properties of C70 on polymerization. We report on a reverse transformation to the monomeric state on heating the polymer to 500 K at ambient pressure. The activation energy of depolymerization was determined to be 1.8(1) eV. We discuss our results in terms of existing structural models for polymerization of C70 and compare the physical properties of C70 and C60 polymers.

Place, publisher, year, edition, pages
Melville, NY: American Institute of Physics (AIP) , 1999. 12-15 p.
Series
AIP Conference Proceedings, ISSN 0094-243X ; 486
Keyword [en]
Fullerenes, C70, polymerization, high pressure synthesis, high pressure, Raman spectroscopy, IR spectroscopy, polymeric fullerenes, C70 polymer
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-23273ISBN: 1-56396-900-9 (print)OAI: oai:DiVA.org:umu-23273DiVA: diva2:222535
Note
Editors: Hans Kuzmany, Jörg Fink, Michael Mehring and Siegmar RothAvailable from: 2009-06-09 Created: 2009-06-09 Last updated: 2010-01-25

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Sundqvist, Bertil

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CiteExportLink to record
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