Space-confined charge transfer turns on multicolor emission in metal-organic frameworks via pressure treatment

Ting Zhang, Yanfeng Yin, Xinyi Yang (), Nuonan Li, Weibin Wang, Yunfeng Yang, Wenming Tian (), Fuquan Bai () and Bo Zou ()
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Ting Zhang: Jilin University
Yanfeng Yin: Chinese Academy of Sciences
Xinyi Yang: Jilin University
Nuonan Li: Jilin University
Weibin Wang: Jilin University
Yunfeng Yang: Jilin University
Wenming Tian: Chinese Academy of Sciences
Fuquan Bai: Jilin University
Bo Zou: Jilin University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Single-component multi-emissive materials with stimuli-responsive properties offer unique advantages in the field of multicolor-tunable photoluminescence (PL). However, precisely modulating the emission of each component and achieving high-efficiency emission present a formidable challenge. Herein, we demonstrate that space-confined charge transfer (CT) turns on bright blue-green-white emission in initially faintly emissive metal-organic frameworks (MOFs) at ambient conditions through pressure treatments. Pressure treatments induce a transition from the initial long-range CT to a space-confined mode, significantly amplifying radiative transitions. Furthermore, the space-confined CT, which occurs between mutually perpendicular ligands, significantly influences the spin-orbit charge transfer intersystem crossing. Precise tuning of space-confined CT kinetics via multi-level pressure treatments allows us to modulate the fluorescence-to-phosphorescence ratio, achieving multicolor-tunable emission in the target MOFs. Our work advances the development of multicolor-tunable smart PL materials and unlocks the potential for their application in atmospheric environments.

Date: 2025
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DOI: 10.1038/s41467-025-59552-1

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