Citation: Ya-Ting Gao, Yi-Lin Zhu, Xiao-Yuan Wang, Li-Ya Liang, Meng-Li Liu, Shuai Chang, Han-Bin Xu, Da-Wei Li, Bin-Bin Chen. Pure organic electrophosphorochromism system[J]. Chinese Chemical Letters, ;2025, 36(11): 110855. doi: 10.1016/j.cclet.2025.110855 shu

Pure organic electrophosphorochromism system

Ya-Ting Gao ^a ,
Yi-Lin Zhu ^b ,
Xiao-Yuan Wang ^a ,
Li-Ya Liang ^a ,
Meng-Li Liu ^c ,
Shuai Chang ^a ,
Han-Bin Xu ^a ,
Da-Wei Li ^{a, *,} ,
Bin-Bin Chen ^{a, *,}

a.
Key Laboratory for Advanced Materials, Shanghai Key Laboratory of Functional Materials Chemistry, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology & Dynamic Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
b.
Institute of Biomedical Photonics and Sensing, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
c.
Department of The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen (CUHK-Shenzhen), Shenzhen 518172, China

daweili@ecust.edu.cn

binbinchen@ecust.edu.cn

Received Date: 22 October 2024
Revised Date: 13 January 2025
Accepted Date: 14 January 2025
Available Online: 16 January 2025

Figures(5)

Electrochromic phosphorescent materials have recently attracted much attention, however, achieving the efficient electrophosphorochromism in pure organic materials is highly challenging and has not been reported yet. Herein, a kind of pure organic host-guest system (BA@CzPA) is constructed by one-pot in-situ melt blending of (9-phenyl-9H-carbazol-2-yl)boronic acid (CzPA) and boric acid (BA). Because of the efficient intersystem crossing promoted by covalent, hydrogen bonding, and confinement effect, the proposed BA@CzPA exhibit the superior room temperature phosphorescence (RTP) efficiency, including an ultralong lifetime of up to 4.23 s and a high phosphorescent quantum yield of 10.9%. Importantly, the BA@CzPA have a unique electrophosphorochromism property, and their electrically-induced RTP emission can gradually red-shift from 440 nm to 548 nm as the current density increases, which is attributed to the transformation of host matrices of BA@CzPA from metaboric acid to B₂O₃ under the electrical stimuli. This finding provides us not only with a new idea to develop pure organic electrophosphorochromism materials with high RTP efficiency, but also with a powerful strategy to fabricate correlation color temperature tunable white light emitting diodes.
- Electrophosphorochromism,
- Host-guest doping,
- Room temperature phosphorescence,
- Electrically-induced red-shifted emission,
- White light emitting diodes
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