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Coronene fusion by heat treatment: road to nanographenes
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
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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 °C were studied using XRD, TEM, Raman, IR, and NEXAFS spectroscopy. The formation of a coronene dimer (dicoronylene) was observed at temperatures 530–550 °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 °C by oligomerization into larger molecules. Above 600 °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
ACS , 2011. Vol. 115, no 27, 13207-13214 p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-46645DOI: 10.1021/jp2028627OAI: oai:DiVA.org:umu-46645DiVA: diva2:439678
Available from: 2011-09-08 Created: 2011-09-08 Last updated: 2017-12-08Bibliographically approved

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Talyzin, AlexandrLuzan, Serhiy
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