New Quinoxaline‐Based Blue Emitters: Molecular Structures, Aggregation‐Induced Enhanced Emission Characteristics and OLED Application
Mao, Xiaoyu; Xie, Fuli; Wang, Xiaohui; Wang, Qingsong; Qiu, Zhipeng; Elsegood, Mark R. J.; Bai, Jie; Feng, Xing; Redshaw, Carl; Huo, Yanping; Hu, Jian‐Yong; Chen, Qing
Mark R. J. Elsegood
Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry
Three new, deep blue light emitters, containing quinoxaline with differing substitution positions (1‐ or 2‐ position) pyrene (biphenyl) moieties, were synthesized by a Pd‐catalysed coupling reaction in high yield, and were fully characterized by 1H/13C NMR spectroscopy, single crystal X‐ray diffraction, and high‐resolution mass spectrometry (HRMS). The designed molecules exhibited good thermal stability (Tg > 452 oC). Single crystal X‐ray diffraction indicated that the compounds containing pyrene units exhibiting π‐π stacking, and thus this family of compounds exhibited intramolecular charge transfer (ICT) and non‐typical and aggregation‐induced enhanced emission (AIEE) characteristics possessing blue emission both in solution and in the aggregation (solid) state. Furthermore, a selected deep blue emitter was utilized as the emitting layer for the fabricating of doped OLED devices, which afforded a deep blue electroluminescence (EL) peak at 428 nm with a narrow FWHM of 57 nm, and the Commission Internationale de L'Eclairage (CIE) chromaticity coordinates of (0.15, 0.06).
Mao, X., Xie, F., Wang, X., Wang, Q., Qiu, Z., Elsegood, M. R. J., …Chen, Q. (in press). New Quinoxaline‐Based Blue Emitters: Molecular Structures, Aggregation‐Induced Enhanced Emission Characteristics and OLED Application. Chinese Journal of Chemistry, https://doi.org/10.1002/cjoc.202100157
|Journal Article Type||Article|
|Acceptance Date||Apr 27, 2021|
|Online Publication Date||Apr 29, 2021|
|Deposit Date||May 10, 2021|
|Publicly Available Date||Apr 30, 2022|
|Journal||Chinese Journal of Chemistry|
|Publisher||Shanghai Institute of Organic Chemistry|
|Peer Reviewed||Peer Reviewed|
|Keywords||Quinoxaline; Pyrene; Blue emitter; Aggregation‐induced emission; Organic light‐emitting diode|
|Additional Information||Received: 2021-02-26; Accepted: 2021-04-27; Published: 2021-04-29|
This file is under embargo until Apr 30, 2022 due to copyright reasons.
Contact C.Redshaw@hull.ac.uk to request a copy for personal use.