Citation: Jialiang Liu, Chengtao Gong, Jinchen Qian, Sen Wang, Yi Liang, Chenglong Guo, Yongwu Peng, Jun Pan. Fluorophore integration strategy endowing 3D covalent organic frameworks with dual-mode white light emission[J]. Chinese Chemical Letters, ;2026, 37(4): 111522. doi: 10.1016/j.cclet.2025.111522 shu

Fluorophore integration strategy endowing 3D covalent organic frameworks with dual-mode white light emission

College of Materials Science and Engineering, Science and Education Integration College of Energy and Carbon Neutralization, Zhejiang University of Technology, Hangzhou 310014, China

ywpeng@zjut.edu.cn

panjun0123@zjut.edu.cn

Received Date: 11 January 2025
Revised Date: 25 June 2025
Accepted Date: 27 June 2025
Available Online: 27 June 2025

Figures(4)

The design of covalent organic frameworks (COFs) with strong fluorescence in both solid and solution states present a significant challenge for white-light-emitting diode (WLED) applications, primarily due to the difficulty of balancing aggregation-induced emission (AIE) and aggregation-caused quenching (ACQ). Here, we report the synthesis of a 7-fold interpenetrated three-dimensional COF (3D COF) with a pts topology, termed ZJUT-M, constructed by co-condensation of a T₄-symmetric monomer with two D_2h-symmetric fluorophores exhibiting distinct emission behaviors. ZJUT-M displays robust fluorescence in both solid and solution states, enabling its use in WLEDs. Mechanistic studies reveal that the dual-mode emission is driven by the synergistic integration of high-degree-of-freedom chromophores, which promote AIE emission in the solid state, and conformationally restricted fluorophores, which suppress ACQ effect in solution. These findings provide a strategic pathway for achieving multi-state emissive COFs, opening avenues for their application in advanced optoelectronic devices, including next-generation LEDs.
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