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Progress in Chemistry 2024, Vol. 36 Issue (3): 393-400 DOI: 10.7536/PC230917 Previous Articles   Next Articles

• Review •

Triptycene Based Electroluminescent Materials

Huihui Xu, Qingsong Wang, Junjie Mao, Bihai Tong(), Qianfeng Zhang()   

  1. Institute of Molecular Engineering and Applied Chemistry, School of Metallurgy Engineering, Anhui University of Technology, Maanshan 243002, China
  • Received: Revised: Online: Published:
  • Contact: * e-mail: tongbihai@ahut.edu.cn (Bihai Tong);zhangqf@ahut.edu.cn (Qianfeng Zhang)
  • Supported by:
    National Natural Science Foundation of China(21572001)
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Organic light-emitting diodes (OLEDs) have the advantages of self-luminous, high efficiency, light and thin structure, and can achieve diverse designs such as transparency and flexibility. They have broad application prospects in fields such as display and lighting. Triptycene is a stable, three-dimensional, and rigid structure formed by connecting three benzene rings through saturated carbon, and the conjugation between the three benzene rings is very small. Different substituents on the three benzene rings can also achieve very stable chirality. The triptycene group can provide an ideal rigid three-dimensional framework for the design of high-performance luminescent materials, in order to enhance the stability of luminescent materials, regulate intermolecular interactions (reduce concentration quenching while improving film formation), and maintain a stable chiral environment. In this paper, the research progress of incorporating triptycene group into electroluminescent electron transport layer and light-emitting layer material molecules is reviewed. The future of triptycene based electroluminescent materials is also prospected. By analyzing and summarizing the influence of triptycene group on material properties, its advantages are identified, so as to play a role in attracting more researchers to carry forward the advantages of triptycene in the field of new materials in the future.

Contents

1 Introduction

2 The host materials and electron transport materials with triptycene group

3 Fluorescent materials with triptycene group

4 TADF materials with triptycene group

5 Iridium complex phosphorescent materials with triptycene group

Key words: triptycene, thermally activated delayed fluorescence, circularly polarized light, phosphorescent material, organic light-emitting diode
Fig. 1 Molecular structure of triptycene[2]
Fig. 2 Molecular structure of the host materials and electron transport materials with triptycene group[7,8]
Fig. 3 Molecular structure of triptycene-based pyrazine derivatives and their fluorescence photographs in solid state and n-hexane solution[8], Copyright 2015, Journal of Organic Chemistry
Fig. 4 Molecular structure of triptycene-based silole derivatives and fluorescence photographs of their powders in different states[10], Copyright 2020, Materials Chemistry Frontiers
Fig. 5 Molecular structure of TADF materials with simultaneous connection of donor and acceptor on the triptycene skeleton[12,15?~17]
Fig. 6 The molecular structure of TADF materials with only donor or acceptor connections on the triptycene skeleton[19???-23]
Fig. 7 Molecular structure of triptycene-based chiral TADF materials[27??~30]
Fig. 8 Molecular structure of iridium complexes containing triptycene groups[31,32,33,34]
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