Room-Temperature Phosphorescence of Pure Axially Chiral Bicarbazoles
|Corresponding Author||Xu，Zong Xiang; Yang，Cheng; Wu，Peng; Xiang，Haifeng|
Ultralong room-temperature phosphorescence (RTP) is greatly important in a series of applications, but obtaining RTP from metal-free organic materials is still an enormous challenge due to the spin-forbidden nature of triplet excitons. Because of its electron-rich nature and easy derivatization, carbazole (Cz) is widely used to build organic RTP and thermally activated delayed fluorescence (TADF) materials. However, Liu et al. (Nat. Mater.2021, 20, 175) recently demonstrated that the RTP of Cz is induced by charge traps of its isomeric impurity in commercial sources. Here, on the basis of the classical El-Sayed rule and the recently discovered intersystem crossing promotion principles (twisted structure and charge transfer), we designed and prepared highly pure (>99.9%) (R/S)-octahydro-binaphthyl-based bicarbazoles (BiCz) for high-performance RTP (ΦP = 23%; τp = 1.09 s). Interestingly, BiCz exhibited photoactivated TADF and RTP in isolated and aggregated states, respectively, and thus would be an efficient tool for rejuvenating Cz-based RTP.
NI Journal Papers
National Natural Science Foundation of China[
|WOS Research Area|
Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
|WOS Accession No|
|EI Accession Number|
Fluorescence ; Phosphorescence
|ESI Classification Code|
Light/Optics:741.1 ; Chemical Reactions:802.2
Cited Times [WOS]:5
|Document Type||Journal Article|
|Department||Department of Chemistry|
1.College of Chemistry,Sichuan University,Chengdu,610041,China
2.Analytical & Testing Center,Sichuan University,Chengdu,610041,China
3.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518000,China
|Corresponding Author Affilication||Department of Chemistry|
Song，Jintong,Wang，Yanying,Qu，Lang,et al. Room-Temperature Phosphorescence of Pure Axially Chiral Bicarbazoles[J]. Journal of Physical Chemistry Letters,2022,13(25):5838-5844.
Song，Jintong.,Wang，Yanying.,Qu，Lang.,Fang，Lizhi.,Zhou，Xiangge.,...&Xiang，Haifeng.(2022).Room-Temperature Phosphorescence of Pure Axially Chiral Bicarbazoles.Journal of Physical Chemistry Letters,13(25),5838-5844.
Song，Jintong,et al."Room-Temperature Phosphorescence of Pure Axially Chiral Bicarbazoles".Journal of Physical Chemistry Letters 13.25(2022):5838-5844.
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