Nearly Unity Quantum Yield Persistent Room‐Temperature Phosphorescence from Heavy Atom‐Free Rigid Inorganic/Organic Hybrid Frameworks

• DOI: 10.1002/anie.202207104
• Publication Date: 2022-06-08T14:49:21Z
• Authors: Xin Zheng; Yuanshan Huang; Wei Lv; Jianzhong Fan; Qidan Ling; Zhenghuan Lin
• Keywords: Quantum yield

Synergism between covalent and non-covalent bonds is employed to fix an organic phosphor guest in a rigid inorganic framework, simulating the stiffening effect seen glassy state realizing efficient ultralong room-temperature phosphorescence (RTP). Twelve heavy-atom-free composites have been obtained through introducing arylboric or arylcarboxylic acid derivatives into boric matrix by solid-phase synthesis. Owing of multiple bonds, all show highly persistent RTP molecules with quantum yield ranging from 39.8 % ca. 100 lifetime up 8.74 s, which results 55 s afterglow visible naked eye after exposure portable UV lamp. Interestingly, it found that substitution position quantity carboxyl great influence on phosphorescent properties, heavy-atom invalid such host-guest hybrid systems. The g grade composite easily prepared because solvent-free, green, simple synthesis method. These provide important way for development materials ultrahigh lifetime, as well their practical applications fields anti-counterfeiting information storage, among others.