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Coronene Fusion by Heat Treatment: Road to Nanographenes
Dept of Physics, Umeå University, Umeå.
Dept of Physics, Umeå University, Umeå.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
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2011 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 115, no 27, 13207-13214 p.Article in journal (Refereed) Published
Abstract [en]

The reactions of coronene dehydrogenation and fusion upon heat treatment in the temperature range of 500-700 degrees C were studied using XRD, TEM, Raman, IR, and NEXAFS spectroscopy. The formation of a coronene dimer (dicoronylene) was observed at temperatures 530-550 degrees C; dicoronylene can easily be separated using sublimation with a temperature gradient. An insoluble and not sublimable black precipitate was found to form at higher temperatures. Analysis of the data shows that dimerization of coronene is followed at 550-600 degrees C by oligomerization into larger molecules. Above 600 degrees C amorphization of the material and formation of graphitic nanoparticles was observed. Coronene fusion by annealing is proposed as a road to synthesis of larger polycyclic aromatic hydrocarbons and nanographenes.

Place, publisher, year, edition, pages
2011. Vol. 115, no 27, 13207-13214 p.
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Materials Science
Identifiers
URN: urn:nbn:se:uu:diva-156619DOI: 10.1021/jp2028627ISI: 000292479700011OAI: oai:DiVA.org:uu-156619DiVA: diva2:432787
Available from: 2011-08-06 Created: 2011-08-04 Last updated: 2017-12-08Bibliographically approved

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Leifer, KlausAkhtar, Sultan

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