Dianthracenylazatrioxacirculene: Synthesis, Characterization and Application in OLEDs

A soluble, green‐blue fluorescent, π‐extended azatrioxa[8]circulene was synthesized by oxidative condensation of a 3,6‐dihydroxycarbazole and 1,4‐anthraquinone by using benzofuran scaffolding. This is the first circulene to incorporate anthracene within its carbon framework. Solvent‐dependent fluore...

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Bibliographic Details
Published in:Chemistry : a European journal 2021-08, Vol.27 (45), p.11609-11617
Main Authors: Pedersen, Stephan K, Pedersen, Viktor B R, Kamounah, Fadhil S, Broløs, Line M, Baryshnikov, Glib V, Valiev, Rashid R, Ivaniuk, Khrystyna, Stakhira, Pavlo, Minaev, Boris, Nataliya Karaush‐Karmazin, Ågren, Hans, Pittelkow, Michael
Format: Article
Language:English
Subjects:
Anthracene
Anthraquinone
Anthraquinones
Benzofuran
Chemistry
Circulenes
Condensates
Electroluminescence
Electron mobility
Emitters
Excimers
Fluorescence
Optical properties
Quantum dots
Quantum efficiency
Scaffolding
Single crystals
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Summary:A soluble, green‐blue fluorescent, π‐extended azatrioxa[8]circulene was synthesized by oxidative condensation of a 3,6‐dihydroxycarbazole and 1,4‐anthraquinone by using benzofuran scaffolding. This is the first circulene to incorporate anthracene within its carbon framework. Solvent‐dependent fluorescence and bright green electroluminescence accompanied by excimer emission are the key optical properties of this material. The presence of sliding π‐stacked columns in the single crystal of dianthracenylazatrioxa[8]circulene is found to cause a very high electron‐hopping rate, thus making this material a promising n‐type organic semiconductor with an electron mobility predicted to be around 2.26 cm2 V−1 s−1. The best organic light‐emitting diode (OLED) device based on the dianthracenylazatrioxa[8]circulene fluorescent emitter has a brightness of around 16 000 Cd m−2 and an external quantum efficiency of 3.3 %. Quantum dot‐based OLEDs were fabricated by using dianthracenylazatrioxa[8]circulene as a host matrix material.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.202100090