Dynamic organic mechanoluminescence (ML): The roles of Mechano-induced conformational isomer and energy transfer from ML to photoluminescence (PL)
Dynamic organic mechanoluminescence (ML): The roles of Mechano-induced conformational isomer and energy transfer from ML to photoluminescence (PL)
复制标题
动态有机机械力发光 (ML)：力诱导构象异构体的作用以及从 ML 到光致发光 (PL) 的能量转移
DOI：
10.1016/j.cej.2022.135519
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发表时间：
2022-03-08
影响因子：
15.1
通讯作者：
Chi, Zhenguo
中科院分区：
文献类型：
--
作者：
Deng, Huangjun;Yang, Zhan;Chi, Zhenguo
有机机械发光(ML)，特别是连续磨削过程中颜色变化的动态机械发光，在机械相关的照明、成像和传感器等领域有着广阔的应用前景。在这里，通过简单地改变溴原子在吩噻嗪(PTZ)衍生物(BR-BPZ)异构体上的取代位置，报道了将ML特征从NO、稳定特性微调到动态特性的新见解。此外，还从实验上证实了机械诱导构象转变、研磨后晶态和非晶态粉末的混合形成以及晶态部分的ML向内部非晶态部分的光致发光(PL)的能量传递是促进有机材料动态ML的三个关键因素。这些发现不仅为有机发光材料的设计提供了一种策略，而且也为基于动态发光材料的彩色无掺杂发光显示提供了一种新的应用。
Organic mechanoluminescence (ML), especially dynamic ML with color change along continuously grinding, is promising for mechano-dependent applications of lighting, imaging and sensors. Here, new insights for fine tuning ML feature from no, stable to dynamic characteristic, are reported by simply changing the substituted position of bromine atom on isomers of phenothiazine (PTZ) derivative (Br-BPZ). Additionally, three key factors, including mechano-induced conformation transformation, mixture formation of crystal and amorphous powders after ground as well as the energy transfer from ML of crystal part to photoluminescence (PL) of amorphous part inside, have been experimentally confirmed for promoting dynamic ML (an extremely rare kind of ML) of organic materials. These findings not only provide a strategy for design of organic ML but also develop a new application of colorful ML display without doping based on dynamic ML materials.