Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 27, Pages 13207-13214Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp2028627
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Funding
- Angpanneforeningens Forskningsstiftelse
- Knut and Alice Wallenberg Foundations
- Swedish Research Council [2010-7249]
- Swedish Energy Agency [30452-1]
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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.
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