Two novel blue phosphorescent host materials containing phenothiazine-5,5-dioxide structure derivatives

Beilstein Journal of Organic Chemistry
Feng-Ming XieHuai-Xin Wei

Abstract

Two novel D-A bipolar blue phosphorescent host materials based on phenothiazine-5,5-dioxide: 3-(9H-carbazol-9-yl)-10-ethyl-10H-phenothiazine-5,5-dioxide (CEPDO) and 10-butyl-3-(9H-carbazol-9-yl)-10H-phenothiazine-5,5-dioxide (CBPDO) were synthesized and characterized. The photophysical, electrochemical and thermal properties were systematically investigated. CEPDO and CBPDO not only have a high triplet energy but also show a bipolar behavior. Moreover, their fluorescence emission peaks are in the blue fluorescence region at 408 nm and the fluorescence quantum efficiency (Φ) of CEPDO and CBPDO were 62.5% and 59.7%, respectively. Both CEPDO and CBPDO showed very high thermal stability with decomposition temperatures (Td) of 409 and 396 °C as well as suitable HOMO and LUMO energy levels. This preferable performance suggests that CEPDO and CBPDO are alternative bipolar host materials for the PhOLEDs.

References

Mar 4, 2011·Chemical Society Reviews·Youtian TaoJingui Qin
Jan 24, 2014·Advanced Materials·Yuki SeinoJunji Kido
Dec 29, 2015·Journal of the American Chemical Society·Pachaiyappan RajamalliChien-Hong Cheng
Aug 10, 2016·The Journal of Physical Chemistry Letters·Paloma L Dos SantosAndrew P Monkman

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Citations

Aug 17, 2018·Beilstein Journal of Organic Chemistry·Eli Zysman-Colman
Feb 16, 2021·Journal of Molecular Graphics & Modelling·Nguyen Van TrangMinh Tho Nguyen

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Methods Mentioned

BETA
phosphorescence
differential scanning calorimetry
NMR

Software Mentioned

Gaussian

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