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Tuneable near white-emissive two-dimensional covalent organic frameworks

Author

Listed:
  • Xing Li

    (National University of Singapore, 3 Science Drive 3
    National University of Singapore, 6 Science Drive 2
    National University of Singapore, Centre for Life Sciences, #05-01, 28 Medical Drive)

  • Qiang Gao

    (National University of Singapore, 3 Science Drive 3)

  • Juefan Wang

    (National University of Singapore, 6 Science Drive 2
    National University of Singapore, 2 Science Drive 3)

  • Yifeng Chen

    (National University of Singapore, 6 Science Drive 2
    National University of Singapore, 2 Science Drive 3)

  • Zhi-Hui Chen

    (National University of Singapore, 3 Science Drive 3)

  • Hai-Sen Xu

    (National University of Singapore, 3 Science Drive 3)

  • Wei Tang

    (A*STAR, 2 Fusionopolis Way, Innovis)

  • Kai Leng

    (National University of Singapore, 3 Science Drive 3
    National University of Singapore, 6 Science Drive 2)

  • Guo-Hong Ning

    (National University of Singapore, 3 Science Drive 3)

  • Jishan Wu

    (National University of Singapore, 3 Science Drive 3)

  • Qing-Hua Xu

    (National University of Singapore, 3 Science Drive 3)

  • Su Ying Quek

    (National University of Singapore, 6 Science Drive 2
    National University of Singapore, 2 Science Drive 3)

  • Yixin Lu

    (National University of Singapore, 3 Science Drive 3)

  • Kian Ping Loh

    (National University of Singapore, 3 Science Drive 3
    National University of Singapore, 6 Science Drive 2)

Abstract

Most two-dimensional (2D) covalent organic frameworks (COFs) are non-fluorescent in the solid state even when they are constructed from emissive building blocks. The fluorescence quenching is usually attributed to non-irradiative rotation-related or π–π stacking-caused thermal energy dissipation process. Currently there is a lack of guiding principle on how to design fluorescent, solid-state material made of COF. Herein, we demonstrate that the eclipsed stacking structure of 2D COFs can be used to turn on, and tune, the solid-state photoluminescence from non-emissive building blocks by the restriction of intramolecular bond rotation via intralayer and interlayer hydrogen bonds among highly organized layers in the eclipse-stacked COFs. Our COFs serve as a platform whereby the size of the conjugated linkers and side-chain functionalities can be varied, rendering the emission colour-tuneable from blue to yellow and even white. This work provides a guide to design new solid-state emitters using COFs.

Suggested Citation

  • Xing Li & Qiang Gao & Juefan Wang & Yifeng Chen & Zhi-Hui Chen & Hai-Sen Xu & Wei Tang & Kai Leng & Guo-Hong Ning & Jishan Wu & Qing-Hua Xu & Su Ying Quek & Yixin Lu & Kian Ping Loh, 2018. "Tuneable near white-emissive two-dimensional covalent organic frameworks," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04769-6
    DOI: 10.1038/s41467-018-04769-6
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    Cited by:

    1. Yangyang Xu & Tu Sun & Tengwu Zeng & Xiangyu Zhang & Xuan Yao & Shan Liu & Zhaolin Shi & Wen Wen & Yingbo Zhao & Shan Jiang & Yanhang Ma & Yue-Biao Zhang, 2023. "Symmetry-breaking dynamics in a tautomeric 3D covalent organic framework," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Darosch Asgari & Julia Grüneberg & Yunkai Luo & Hüseyin Küçükkeçeci & Samrat Ghosh & Veniamin Chevelkov & Sabrina Fischer-Lang & Jérôme Roeser & Adam Lange & Bruce Dunn & Michael Gradzielski & Arne Th, 2024. "An anionic two dimensional covalent organic framework from tetratopic borate centres pillared by lithium ions," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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