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Synthesis of a Giant 222 Carbon Graphite Sheet
Author(s) -
Simpson Christopher D.,
Brand J. Diedrich,
Berresheim Alexander J.,
Przybilla Laurence,
Räder Hans Joachim,
Müllen Klaus
Publication year - 2002
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20020315)8:6<1424::aid-chem1424>3.0.co;2-z
Subject(s) - carbon fibers , benzene , graphite , polycyclic aromatic hydrocarbon , chemistry , molecule , sequence (biology) , spectroscopy , mass spectrometry , hydrocarbon , mass spectrum , polycyclic compound , characterization (materials science) , photochemistry , polymer chemistry , organic chemistry , materials science , nanotechnology , physics , biochemistry , chromatography , quantum mechanics , composite number , composite material
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.