Zhang Ting, Yin Yanfeng, Yang Xinyi, Li Nuonan, Wang Weibin, Yang Yunfeng, Tian Wenming, Bai Fuquan, Zou Bo
State Key Laboratory of High Pressure and Superhard Materials, Synergetic Extreme Condition High-Pressure Science Center, College of Physics, Jilin University, Changchun, China.
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
Nat Commun. 2025 May 5;16(1):4166. doi: 10.1038/s41467-025-59552-1.
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.
具有刺激响应特性的单组分多发射材料在多色可调光致发光（PL）领域具有独特优势。然而，精确调节每个组分的发射并实现高效发射是一项艰巨的挑战。在此，我们证明了空间受限电荷转移（CT）通过压力处理在环境条件下使初始微弱发光的金属有机框架（MOF）产生明亮的蓝绿白发射。压力处理诱导从初始的长程CT转变为空间受限模式，显著放大辐射跃迁。此外，在相互垂直的配体之间发生的空间受限CT显著影响自旋轨道电荷转移系间窜越。通过多级压力处理精确调节空间受限CT动力学，使我们能够调节荧光与磷光的比例，在目标MOF中实现多色可调发射。我们的工作推动了多色可调智能PL材料的发展，并开启了其在大气环境中应用的潜力。
