Abstract
Decacyclene was carbonized in a glass tube or a molten salt at various temperatures and the products were analyzed by means of Raman spectroscopy, X-ray diffractometry, ESR and FT-IR spectroscopies in order to investigate the influence of contained pentagonal aromatic rings on the change of carbon structures with heat-treatment. It was found that the presence of the pentagonal rings disturbs the growth of planar aromatic layers at the early stage of carbonization and that the development of the layer stacking to c-axis with further heat-treatment is influenced predominantly by the phase during the carbonization stage rather than by the pentagonal rings.
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