@article{9c5bfc86bf2d4d0c8f2db8837b5d0988,
title = "A Pentacene-based Nanotube Displaying Enriched Electrochemical and Photochemical Activities",
abstract = "Unlike previously well-studied, acyclic pentacene oligomers, the first synthesis of a cyclic pentacene trimer with a fixed tubular conformation is reported. A short-step synthesis starting from common pentacenequinone yielded the target molecule with a 1.5 nanometer length and a subnanometer pore. Steady-state spectroscopic analyses revealed that the close proximity of the non-conjugated, three pentacene chromophores allows the nanotube to display stepwise electrochemical/chemical oxidation characteristics. Furthermore, time-resolved transient absorption measurements elucidated the generation of an excited triplet state of the nanotube, with high quantum yield reaching about 180 % through intramolecular singlet fission and a very long triplet lifetime.",
keywords = "macrocycles, nanotubes, pentacene, singlet fission, triplet states",
author = "Kiyonori Kuroda and Kohei Yazaki and Yuya Tanaka and Munetaka Akita and Hayato Sakai and Taku Hasobe and Tkachenko, {Nikolai V.} and Michito Yoshizawa",
note = "Funding Information: This work was supported by JSPS KAKENHI (Grant No. JP17H05359/JP18H01990/JP17K14476/JP17H05381/ JP17H05270/JP18H01957) and Support for Tokyotech Advanced Researchers (STAR). The computations were partly performed using Research Center for Computational Science, Okazaki, Japan and the TSUBAME3.0 supercomputer in Tokyo Tech. Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2019",
month = jan,
day = "21",
doi = "10.1002/anie.201812976",
language = "English",
volume = "58",
pages = "1115--1119",
journal = "Angewandte Chemie - International Edition",
issn = "1433-7851",
publisher = "John Wiley and Sons Ltd",
number = "4",
}