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Coronene fusion by heat treatment: Road to nanographenes
Department of Physics, Umeå University.
Department of Physics, Umeå University.
Division for Electron Microscopy and Nanoengineering, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, Box 534, SE-75121 Uppsala, Sweden.
Division for Electron Microscopy and Nanoengineering, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, Box 534, SE-75121 Uppsala, Sweden.
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2011 (engelsk)Inngår i: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 115, nr 27, s. 13207-13214Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The reactions of coronene dehydrogenation and fusion upon heat treatment in the temperature range of 500700 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 550600 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.

sted, utgiver, år, opplag, sider
Washington: American Chemical Society , 2011. Vol. 115, nr 27, s. 13207-13214
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URN: urn:nbn:se:kau:diva-15736DOI: 10.1021/jp2028627ISI: 000292479700011OAI: oai:DiVA.org:kau-15736DiVA, id: diva2:571504
Tilgjengelig fra: 2012-11-22 Laget: 2012-11-22 Sist oppdatert: 2019-05-20bibliografisk kontrollert

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