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Conducting π Columns of Highly Symmetric Coronene, The Smallest Fragment of Graphene
Author(s) -
Yoshida Yukihiro,
Isomura Kazuhide,
Kishida Hideo,
Kumagai Yoshihide,
Mizuno Motohiro,
Sakata Masafumi,
Koretsune Takashi,
Nakano Yoshiaki,
Yamochi Hideki,
Maesato Mitsuhiko,
Saito Gunzi
Publication year - 2016
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/chem.201505023
Subject(s) - coronene , stacking , graphene , molecule , chemical physics , materials science , chemistry , molecular physics , nanotechnology , organic chemistry
Coronene, which is the smallest D 6 h ‐symmetric polycyclic aromatic hydrocarbon, attracts particular attention as a basic component of electronic materials because it is the smallest fragment of graphene. However, carrier generation by physical methods, such as photo‐ or electric field‐effect, has barely been studied, primarily because of the poor π‐conduction pathway in pristine coronene solid. In this work we have developed unprecedented π‐stacking columns of cationic coronene molecules by electrochemical hole‐doping with polyoxometallate dianions. The face‐to‐face π–π interactions as well as the partially charged state lead to electrical conductivity at room temperature of up to 3 S cm −1 , which is more than 10 orders of magnitude higher than that of pristine coronene solid. Additionally, the robust π–π interactions strongly suppress the in‐plane rotation of the coronene molecules, which has allowed the first direct observation of the static Jahn–Teller distortion of cationic coronene molecules.