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A Pentacene‐based Nanotube Displaying Enriched Electrochemical and Photochemical Activities

Kuroda, Kiyonori ; Yazaki, Kohei ; Tanaka, Yuya ; Akita, Munetaka ; Sakai, Hayato ; Hasobe, Taku ; Tkachenko, Nikolai V. ; Yoshizawa, Michito

Angewandte Chemie, 2019-01, Vol.131 (4), p.1127-1131 [Periódico revisado por pares]

Weinheim: Wiley Subscription Services, Inc

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Título:
A Pentacene‐based Nanotube Displaying Enriched Electrochemical and Photochemical Activities
Autor: Kuroda, Kiyonori ; Yazaki, Kohei ; Tanaka, Yuya ; Akita, Munetaka ; Sakai, Hayato ; Hasobe, Taku ; Tkachenko, Nikolai V. ; Yoshizawa, Michito
Assuntos: Atomic energy levels ; Chemical synthesis ; Chemistry ; Chromophores ; Conformation ; Electrochemistry ; Makrocyclen ; Nanoröhren ; Nanotubes ; Oligomers ; Organic chemistry ; Oxidation ; Pentacen ; Photochemicals ; Singulett-Aufspaltung ; Trimers ; Triplet state ; Triplett-Zustände
É parte de: Angewandte Chemie, 2019-01, Vol.131 (4), p.1127-1131
Descrição: 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. Eine Pentacen‐basierte Nanoröhre wurde erstmals synthetisiert. Die räumliche Nähe dreier nichtkonjugierter Pentacen‐Chromophore führt zu stufenweiser (elektro)chemischer Oxidation. Zeitauflösende Transientenabsorptionsmessungen belegen die Bildung eines Triplett‐Anregungszustands mit hoher Quantenausbeute (ca. 180 %) und sehr langer Lebensdauer.
Editor: Weinheim: Wiley Subscription Services, Inc
Idioma: Inglês

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A Pentacene‐based Nanotube Displaying Enriched Electrochemical and Photochemical Activities

Kuroda, Kiyonori ; Yazaki, Kohei ; Tanaka, Yuya ; Akita, Munetaka ; Sakai, Hayato ; Hasobe, Taku ; Tkachenko, Nikolai V. ; Yoshizawa, Michito

Weinheim: Wiley Subscription Services, Inc

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