Coronene fusion by heat treatment: road to nanographenes
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
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.
IdentifiersURN: urn:nbn:se:umu:diva-46645DOI: 10.1021/jp2028627OAI: oai:DiVA.org:umu-46645DiVA: diva2:439678