“…11 −13 In 1963, 11 years after describing the aromaticity of ferrocene, modification of ferrocene via ligand exchange reaction (LER) was reported. 14 Later, LER was also described for other aromatic and polyaromatic compounds including substituted benzenes, 15 9,10-dimethylanthracene, 16 phenanthrene and its derivatives, 17 picene, 18 sumanene, 19 etc. 20 Taking into account that aromatic clusters vibrationally and electronically might be considered as components of graphite superlattice, 21 in 1999, LER between ferrocene and carbon black and highly oriented pyrolytic graphite (HOPG) in the presence of the AlCl 3 /Al catalytic system was reported for the first time.…”