Coronene Fusion by Heat Treatment: Road to Nanographenes

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.


Published in:
Journal Of Physical Chemistry C, 115, 13207-13214
Year:
2011
Publisher:
American Chemical Society
ISSN:
1932-7447
Keywords:
Laboratories:




 Record created 2011-08-29, last modified 2018-03-17


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