The real-time monitoring of spontaneous molecular directed motion is a highly important but very challenging task. In this work, a rod-like aggregation-induced emission (AIE) molecule was carefully designed and facilely synthesized. The AIE molecule, the salicylaldehyde 4-butoxyaniline Schiff base (SBA), exhibited a unique self-recovery property from a semi-ordered structure to an ordered structure along with significant fluorescence changes after grinding. The fluorescence changes were monitored to obtain important kinetic information regarding the spontaneous molecular directed motion process, including the kinetic order, rate constants, half-life, and apparent activation energy. Unlike instrumental analytical methods such as PXRD and AFM, which only give information on a stable state of samples, the proposed fluorescence method provides a new perspective for real-time visualization of spontaneous molecular directed motion in situ in the solid state.

中文翻译：

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利用聚集诱导的发射现象可视化固态的自发分子定向运动

自发分子定向运动的实时监测是一项非常重要但又极具挑战性的任务。在这项工作中，精心设计并轻松合成了棒状聚集诱导发射（AIE）分子。AIE分子，水杨醛4-丁氧基苯胺席夫碱（SBA），从半有序结构到有序结构表现出独特的自我恢复特性，并且在研磨后具有显着的荧光变化。监测荧光变化以获得有关自发分子定向运动过程的重要动力学信息，包括动力学顺序，速率常数，半衰期和表观活化能。不同于仪器分析方法如PXRD和AFM，只给出关于样品的稳定状态信息，所提出的荧光方法提供自发的分子定向运动的实时可视化的新视角原位在固体状态。