机械容积
材料科学
发光
光致发光
激发态
卤化物
圆极化
量子产额
光电子学
光化学
光学
原子物理学
物理
化学
无机化学
荧光
微带线
作者
Xin He,Yudian Zheng,Zhishan Luo,Yi Wei,Yulian Liu,Chenlong Xie,Chen Li,Dengfeng Peng,Zewei Quan
标识
DOI:10.1002/adma.202309906
摘要
Abstract Hybrid metal halides (HMHs) with efficient circularly polarized luminescence (CPL) have application prospects in many fields, due to their abundant host–guest structures and high photoluminescence quantum yield (PLQY). However, CPLs in HMHs are predominantly excited by light or electricity, limiting their use in multivariate environments. It is necessary to explore a novel excitation method to extend the application of chiral HMHs as smart stimuli‐responsive optical materials. In this work, an enantiomeric pair of 0D hybrid manganese bromides, [H 2 (2 R ,4 R )‐(+)/(2 S ,4 S )‐(−)‐2,4‐bis(diphenylphosphino)pentane]MnBr 4 [( R / S ) ‐1 ] is presented, which exhibits efficient CPL emissions with near‐unity PLQYs and high dissymmetry factors of ± 2.0 × 10 −3 . Notably, ( R / S ) ‐1 compounds exhibit unprecedented and bright circularly polarized mechanoluminescence (CPML) emissions under mechanical stimulation. Moreover, ( R / S ) ‐1 possess high mechanical force sensitivities with mechanoluminescence (ML) emissions detectable under 0.1 N force stimulation. Furthermore, this ML emission exhibits an extraordinary antithermal quenching effect in the temperature range of 300–380 K, which is revealed to originate from a thermal activation energy compensation mechanism from trap levels to Mn(II) 4 T 1 level. Based on their intriguing optical properties, these compounds as chiral force‐responsive materials are demonstrated in multilevel confidential information encryption.
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