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Boosting organic phosphorescence in adaptive host-guest materials by hyperconjugation

Author

Listed:
  • Huili Ma

    (Nanjing Tech University)

  • Lishun Fu

    (Nanjing Tech University)

  • Xiaokang Yao

    (Nanjing Tech University
    Xiamen University)

  • Xueyan Jiang

    (Nanjing Tech University)

  • Kaiqi Lv

    (Nanjing Tech University)

  • Qian Ma

    (Nanjing Tech University)

  • Huifang Shi

    (Nanjing Tech University)

  • Zhongfu An

    (Nanjing Tech University
    Xiamen University)

  • Wei Huang

    (Nanjing Tech University
    Xiamen University
    Northwestern Polytechnical University)

Abstract

Phosphorescence is ubiquitous in heavy atom-containing organic phosphors, which attracts considerable attention in optoelectronics and bioelectronics. However, heavy atom-free organic materials with efficient phosphorescence are rare under ambient conditions. Herein, we report a series of adaptive host-guest materials derived from dibenzo-heterocyclic analogues, showing host-dependent color-tunable phosphorescence with phosphorescence efficiency of up to 98.9%. The adaptive structural deformation of the guests arises from the hyperconjugation, namely the n→π* interaction, enabling them to inhabit the cavity of host crystals in synergy with steric effects. Consequently, a perfect conformation match between host and guest molecules facilitates the suppression of triplet exciton dissipation, thereby boosting the phosphorescence of these adaptive materials. Moreover, we extend this strategy to a ternary host-guest system, yielding both excitation- and time-dependent phosphorescence with a phosphorescence efficiency of 92.0%. This principle provides a concise way for obtaining efficient and color-tunable phosphorescence, making a major step toward potential applications in optoelectronics.

Suggested Citation

  • Huili Ma & Lishun Fu & Xiaokang Yao & Xueyan Jiang & Kaiqi Lv & Qian Ma & Huifang Shi & Zhongfu An & Wei Huang, 2024. "Boosting organic phosphorescence in adaptive host-guest materials by hyperconjugation," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47992-0
    DOI: 10.1038/s41467-024-47992-0
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    References listed on IDEAS

    as
    1. Lulin Xu & Yuhang Mo & Ning Su & Changshen Shi & Ning Sun & Yuewei Zhang & Lian Duan & Zheng-Hong Lu & Junqiao Ding, 2023. "D-O-A based organic phosphors for both aggregation-induced electrophosphorescence and host-free sensitization," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Vojislava Pophristic & Lionel Goodman, 2001. "Hyperconjugation not steric repulsion leads to the staggered structure of ethane," Nature, Nature, vol. 411(6837), pages 565-568, May.
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    Cited by:

    1. Fei Nie & Dongpeng Yan, 2024. "Bio-sourced flexible supramolecular glasses for dynamic and full-color phosphorescence," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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