Piezofluorochromism and morphology of a new aggregation-induced emission compound derived from tetraphenylethylene and carbazole
Piezofluorochromism and morphology of a new aggregation-induced emission compound derived from tetraphenylethylene and carbazole
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DOI：
10.1039/c1nj20782b
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发表时间：
2012-02
影响因子：
3.3
通讯作者：
Xie Zhou;Hai-yin Li;Zhenguo Chi;Xiqi Zhang;Jianyong Zhang;Bingjia Xu;Yi Zhang;Siwei Liu;
中科院分区：
文献类型：
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作者：
Xie Zhou;Hai-yin Li;Zhenguo Chi;Xiqi Zhang;Jianyong Zhang;Bingjia Xu;Yi Zhang;Siwei Liu;
合成了一种新的压致荧光聚集诱导发光化合物。该化合物具有形态可变的发光性质，通过蒸发从不同溶剂体系中的溶液中获得具有不同发光的无定形和结晶聚集体。该化合物的光谱性质和形态结构在压制和退火（或发烟）后发生逆转。结果表明，该材料的压致荧光性质是在外加压力作用下通过晶-非晶相变产生的。单晶X射线衍射分析证实，相变的原因是分子的扭曲构象导致固体分子堆积较差，并在片层界面形成一些空腔。
A new piezofluorochromic aggregation-induced emission compound was synthesized. The compound had morphology-alterable emission property and its amorphous and crystalline aggregates with various emissions were obtained through evaporation from the solutions in different solvent systems. The spectroscopic properties and morphological structures of the compound were reversed upon pressing and annealing (or fuming). The results show that the piezofluorochromic nature is generated through crystalline–amorphous phase transformation under external pressure. The reason for the phase transformation is ascribed to the twisted conformation of the molecule which leads to poor solid molecular packing and formation of some cavities in the interfaces of lamellar layers, as confirmed by single crystal X-ray diffraction analysis.