Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (4): 574-580.doi: 10.1007/s40242-017-7044-7

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Preparation of 9,10-Diarylphenanthrene Derivative and Its Application in Full Color Emitters Synthesis

ZHAO Wenkai1, WANG Zhiming1,3, LI Xueying1, ZHANG Dongdong2, ZHANG Xiaojuan1, LU Ping2   

  1. 1. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, P. R. China;
    2. State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China;
    3. Shenzhen Research Institute, Hong Kong University of Science & Technology, Shenzhen 518057, P. R. China
  • Received:2017-02-07 Revised:2017-03-29 Online:2017-08-01 Published:2017-06-05
  • Contact: WANG Zhiming, LU Ping E-mail:wangzhm1983@163.com;lup@jlu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.51673118),the Natural Science Fund of Guangdong Province,China(No.2014A030313659) and the Science and Technology Plan of Shenzhen City,China(No.JCYC20160428150-429072).

Abstract:

As a building block with high photo-and thermo-stability, phenanthrene plays an important role in the preparation of blue(or deep-blue) and full color fluorescence materials. However, some critical issues must be addressed before its full potential can be realised, such as its tedious and low-yield modification processes and the red-shift effect in its aggregated state. In this work, the inexpensive raw material 9,10-phenanthrenequinone(PQ) was chosen as the preparatory functional phenanthrene block. After modifying PQ via halo-substituted, nucleophilic and rearrangement reactions with high yields, the corresponding monomers featured high reactivity and solubility. Compared with classical synthetic approaches for similar phenanthrene-based derivatives, the low efficiency ring-closed reaction and hazardous lithium-injection operation can be omitted using this approach. This new building block demonstrates a clear steric effect following the introduction of peripheral phenyl and alkoxy groups; moreover, stacking in the aggregated state is avoided, which benefits controlling the bandgap and maintaining blue emission as either an emitter or a donor. By changing the central building block in three oligomers, emission of the three primary colors was achieved in solution and film via the conjugated increment and charge-transform effect. This work provides a method of modifying phenanthrene by a simple and efficient synthesis route with inhibition of solid-state aggregation and offers an effective strategy to further develop functional phenanthrene-based building blocks.

Key words: Phenanthrene, Functionalization, Aggregation, Fluorescence, Three primary colors emission