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. 2002 Mar 15;8(6):1424-9.
doi: 10.1002/1521-3765(20020315)8:6<1424::aid-chem1424>3.0.co;2-z.

Synthesis of a giant 222 carbon graphite sheet

Christopher D Simpson  1 , J Diedrich Brand, Alexander J Berresheim, Laurence Przybilla, Hans Joachim Räder, Klaus Müllen
Affiliations

Synthesis of a giant 222 carbon graphite sheet

Christopher D Simpson et al. Chemistry. .

Abstract

In this paper we present the synthesis and characterization of the so far largest polycyclic aromatic hydrocarbon (PAH), containing 222 carbon atoms or 37 separate benzene units. First a suitable three-dimensional oligophenylene precursor molecule is built up by a sequence of Diels-Alder and cyclotrimerization reactions and then planarized in the final step by oxidative cyclodehydrogenation to the corresponding hexagonal PAH. Structural proof is based on isotopically resolved MALDI-TOF mass spectra and electronic characteristics are studied by UV/Vis spectroscopy.

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