Synthesis of a giant 222 carbon graphite sheet |
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| Authors: | Simpson Christopher D Brand J Diedrich Berresheim Alexander J Przybilla Laurence Räder Hans Joachim Müllen Klaus |
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| Institution: | Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. |
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| 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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