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窄化芘基发光分子半峰宽的合成策略

谢志鑫a#, 黎少玲a#, 刘威a, 严楷*,a, 蒋涛a, 刘一苇a, Islam, Monarul M.*,b, 冯星*,a   

  1. a广东工业大学,广东省广州市番禺区广州大学城外环西路100号,510006
    bSynthesis Laboratory, Chemical Research Division, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka-1205, Bangladesh
  • 收稿日期:2024-05-14 修回日期:2024-06-22

An Efficient Approach to Narrow the Emission Band of Pyrene-based Emitters

Xie, Zhixina#, Li, Shaolinga#, Liu, Weia, Yan, Kai*a, Jiang, Taoa, Liu, Yiweia, Islam, Md. Monarulb,*, Feng, Xinga,*   

  1. aGuangdong University of Technology, Guangzhou 510006, P. R. China. E-mail: hyxhn@sina.com
    bSynthesis Laboratory, Chemical Research Division, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka-1205, Bangladesh. E-mail: mmipavel@yahoo.com
  • Received:2024-05-14 Revised:2024-06-22
  • Contact: E-mail: atc_yank@gdut.edu.cn (Yan K.), mmipavel@yahoo.com (Islam M.M.) and hyxhn@sina.com (Feng X.)
  • About author:#Z. Xin and S. Li contributed equally to this work.
  • Supported by:
    National Natural Science Foundation of China (21975054), the Guangzhou Basic and Applied Basic Research Foundation (2023A04J1372).

The construction of high color purity and high resolution Organic Light-Emitting Diodes (OLEDs) is facilitated by the development of highly-efficient organic luminescent materials with narrow-band emission. Herein, in order to address the problem of broad emission spectra of organic luminescent materials, we present an effective molecular design strategy to reduce the full width at half maximum (FWHM) of emission by integrating the steric hindrance effect in the pyrene system. As the bulky group was introduced into the 2-position, the compounds 5 not only show a relative high quantum yield (> 0.31) in the solid state, but also can suppress the molecular rotation of triphenylamine (TPA) at 3-position to narrow the FWHM in solid state compared to that in solution. And the compound 5c containing biphenyl units exhibit a maximum emission peak at 484 nm with quantum yield of 0.38 and FWHM value of 49 nm in the solid state.

Key words: Aggregation-induced emission, pyrene, narrow-band emission, steric effect