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Polymeric phases of C60
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
1997 (English)In: Fullerenes: Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials, vol. 5: Proceedings of the 192nd Meeting of the Electrochemical Society, Paris 1997; Symposium Fullerenes: Chemistry, Physics, and New Directions, Pennington, NJ: The Electrochemical Society , 1997, 674-679 p.Conference paper, Published paper (Refereed)
Abstract [en]

We have investigated the "low" pressure region where C60 can be transformed into polymeric chains or clusters. To learn more about the polymerization process we have treated pristine C60 at several different temperatures under hydrostatic pressures in silicone oil. We found that the reaction rate varied with temperature. Above 520 K at 1.0 GPa similar and high polymer fractions were obtained in all samples, but at 497 K the polymer fraction was only 10% after three hours, as indicated by the shift of the intensity of the pentagonal pinch mode in the Raman spectrum. Also, samples treated at the same pressure and temperature but with different thermal pre-history showed different degrees of polymerization. We have also found a correlation between the shift of the pentagonal pinch mode in the Raman spectrum to 1463 /cm and the intermolecular vibrational mode at 97 /cm. We therefore make the conclusion that the shift of the pentagonal pinch mode to 1463 /cm corresponds to the presence of dimers in the sample.

Place, publisher, year, edition, pages
Pennington, NJ: The Electrochemical Society , 1997. 674-679 p.
Series
Electrochemical Society Proceedings, 97-42
Keyword [en]
Fullerenes, C60, high pressure synthesis, polymerization, polymer chains, dimers, Raman spectroscopy, Raman spectra
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-25838ISBN: 1-56677-192-7 (print)OAI: oai:DiVA.org:umu-25838DiVA: diva2:234204
Available from: 2009-09-07 Created: 2009-09-07 Last updated: 2010-01-27

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Wågberg, ThomasPersson, Per-AxelSundqvist, Bertil

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CiteExportLink to record
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