Visible-light-excited robust room-temperature phosphorescence of dimeric single-component luminophores in the amorphous state

Danman Guo, Wen Wang, Kaimin Zhang, Jinzheng Chen, Yuyuan Wang, Tianyi Wang, Wangmeng Hou, Zhen Zhang, Huahua Huang, Zhenguo Chi and Zhiyong Yang ()
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Danman Guo: GBRCE for Functuional Molecular Engineering, School of Chemistry, Sun Yat-sen University
Wen Wang: GBRCE for Functuional Molecular Engineering, School of Chemistry, Sun Yat-sen University
Kaimin Zhang: GBRCE for Functuional Molecular Engineering, School of Chemistry, Sun Yat-sen University
Jinzheng Chen: Sun Yat-sen University
Yuyuan Wang: GBRCE for Functuional Molecular Engineering, School of Chemistry, Sun Yat-sen University
Tianyi Wang: GBRCE for Functuional Molecular Engineering, School of Chemistry, Sun Yat-sen University
Wangmeng Hou: Sun Yat-sen University
Zhen Zhang: Sun Yat-sen University
Huahua Huang: Sun Yat-sen University
Zhenguo Chi: GBRCE for Functuional Molecular Engineering, School of Chemistry, Sun Yat-sen University
Zhiyong Yang: GBRCE for Functuional Molecular Engineering, School of Chemistry, Sun Yat-sen University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Organic room temperature phosphorescence (RTP) has significant potential in various applications of information storage, anti-counterfeiting, and bio-imaging. However, achieving robust organic RTP emission of the single-component system is challenging to overcome the restriction of the crystalline state or other rigid environments with cautious treatment. Herein, we report a single-component system with robust persistent RTP emission in various aggregated forms, such as crystal, fine powder, and even amorphous states. Our experimental data reveal that the vigorous RTP emissions rely on their tight dimers based on strong and large-overlap π-π interactions between polycyclic aromatic hydrocarbon (PAH) groups. The dimer structure can offer not only excitons in low energy levels for visible-light excited red long-lived RTP but also suppression of the nonradiative decays even in an amorphous state for good resistance of RTP to heat (up to 70 °C) or water. Furthermore, we demonstrate the water-dispersible nanoparticle with persistent RTP over 600 nm and a lifetime of 0.22 s for visible-light excited cellular and in-vivo imaging, prepared through the common microemulsion approach without overcaution for nanocrystal formation.

Date: 2024
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DOI: 10.1038/s41467-024-47937-7

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