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Topochemical polymerization of C70 controlled by monomer crystal packing
Umeå University, Faculty of Science and Technology, Chemistry.
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2001 (English)In: Science, ISSN 0036-8075, Vol. 293, no 5530, 680-683 p.Article in journal (Refereed) Published
Abstract [en]

Polymeric forms of C60 are now well known, but numerous attempts to obtain C70 in a polymeric state have yielded only dimers. Polymeric C70 has now been synthesized by treatment of hexagonally packed C70 single crystals under moderate hydrostatic pressure (2 gigapascals) at elevated temperature (300°C), which confirms predictions from our modeling of polymeric structures of C70. Single-crystal x-ray diffraction shows that the molecules are bridged into polymeric zigzag chains that extend along the c axis of the parent structure. Solid-state nuclear magnetic resonance and Raman data provide evidence for covalent chemical bonding between the C70 cages.

Place, publisher, year, edition, pages
American Association for the Advanement of Science , 2001. Vol. 293, no 5530, 680-683 p.
Keyword [en]
Fullerenes, C70, polymerization, high pressure, topochemical polymerization, orthorhombic polymer structure, structure, X-ray diffraction, Raman scattering, NMR, nuclear magnetic resonance
National Category
Condensed Matter Physics
Research subject
Materials Science
Identifiers
URN: urn:nbn:se:umu:diva-22022DOI: 10.1126/science.1061434OAI: oai:DiVA.org:umu-22022DiVA: diva2:212373
Note
Supplemental data available at http://www.sciencemag.org/cgi/content/full/293/5530/680/DC1Available from: 2009-04-22 Created: 2009-04-22 Last updated: 2010-01-21

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Publisher's full texthttp://www.sciencemag.org/cgi/content/abstract/293/5530/680

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Johnels, DanSundqvist, Bertil

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