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Visualized Spontaneous Molecular Directed Motion in Solid State

submitted on 28.07.2019, 09:05 and posted on 29.07.2019, 16:59 by Jianxun Liu, Chang Xing, Donghui Wei, Cuiping Yang, Qiuchen Peng, Hongwei Hou, Yuanyuan Li, Kai Li
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 of salicylaldehyde 4-butoxyaniline Schiff base (SBA) was deliberately designed and facilely synthesized, which exhibits unique self-recovery property from semi-ordered structure to ordered structure alongwith significant fluorescence change after grinding. The monitoring of the fluorescence change provides rich kinetic information including kinetic order, rate constants, half-life and apparent activation energy of the spontaneous molecular directed motion process. Unlike instrumental analytical methods such as PXRD and AFM, which only give the information of a stable state of samples, the fluorescence method provided a new perspective to real-time visualize spontaneous molecular directed motion in situ in solid state.


National Natural Science Foundation of China (No. 21501150)

National Natural Science Foundation of China (No. 51502079)

National Natural Science Foundation of China (No. 21671174)

Open Foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University (No. 2019GXYSOF12)


Email Address of Submitting Author


Zhengzhou University



ORCID For Submitting Author


Declaration of Conflict of Interest

No conflict of interest