title: Systematic control of the excited-state dynamics and carrier-transport properties of functionalized benzo[ghi]perylene and coronene derivatives.
abstract: A series of benzo[ghi]perylene (Bp) and coronene (Cor) derivatives substituted with electron-withdrawing methoxycarbonyl (COOMe) or electron-donating methoxyl (MeO) groups was synthesized. The electrochemical, spectroscopic, and photophysical properties of these compounds were investigated by cyclic voltammetry, steady-state and time-resolved spectroscopy, and quantum-yield measurements. Introduction of suitable substituents onto the aromatic rings enabled control of electrochemical and spectroscopic behavior. Examination of excited-state dynamics revealed that fluorescence quantum yields increased with increasing number of COOMe groups in both Bp and Cor derivatives, consistent with the findings of DFT calculations. Single-crystal analysis allowed the performance of field-effect transistors containing single crystals of the derivatives to be rationalized.
authors: Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa 223-8522 (Japan), Fax: (+81) 45-566-1697.
authors: Sunao
authors: S
authors: Hirayama
authors: Hayato
authors: H
authors: Sakai
authors: Yasuyuki
authors: Y
authors: Araki
authors: Minako
authors: M
authors: Tanaka
authors: Masaki
authors: M
authors: Imakawa
authors: Takehiko
authors: T
authors: Wada
authors: Taishi
authors: T
authors: Takenobu
authors: Taku
authors: T
authors: Hasobe
keywords: device fabrication; electrochemistry; fluorescence; polycycles; solid-state structures