Abstract
High-temperature pyrolysis of two fullerene precursors – 1,2′-binaphthyl and 1,3-oligonaphthyl – has been investigated. An oligomer of naphthalene with the appropriate orientation of fragments, which contains all 60 carbon atoms, 12 of 20 six-membered rings and 71 of 90 carbon–carbon bonds required to form the C 60 fullerene cage was synthesized in a three-step synthesis from naphthalene. The formation of fullerene during pyrolysis was confirmed by MALDI-TOF and HPLC analysis of the toluene extract obtained from the raw soot. It was found that the toluene extract contains free C 60 fullerene but the main share of fullerenes exists in the form of their derivatives. The yield of free C 60 was estimated as 0.1% by HPLC but the overall yield of C 60 seems to be higher and was estimated as ≈1%.
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