A series of star-shaped oligofluorene molecules, each containing a TPE core, have been specifically designed and produced to show effective aggregation-induced emission (AIE). Each molecule differs either in the number of fluorene units within the arms (e.g., 1 or 4, compounds 4 and 5), or the terminal group positioned at the end of each arm (e.g., H, TMS, or TPA, compounds 4, 6, and 7). Although they are all poor emitters in solution phase they become efficient yellow-green luminogens in the condensed state. Their AIE properties were investigated in THF/H2O mixtures, with each molecule exhibiting a clear emission enhancement at specific water contents. An all-organic distributed feedback (DFB) laser was fabricated using compound 4 as the gain material and exhibited an average threshold energy fluence of 60 ± 6 μJ/cm2 and emission in the green region. Furthermore, piezofluorochromism studies on a thin film of this material displayed a linear dependence of the amplified spontaneous emission (ASE) peak position on applied pressure, indicating potential applications as lasing-based pressure sensors. © 2016 The Authors. Journal of Polymer Science Part A: Polymer Chemistry Published by Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 734-746.

中文翻译：

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含芴的四苯基乙烯分子作为激光材料。

经过专门设计和生产了一系列星形寡聚芴分子，每个分子均包含TPE核，以显示有效的聚集诱导发射（AIE）。每个分子的臂内芴单元数量不同（例如1或4，化合物4和5），或者位于每个臂末端的末端基团不同（例如H，TMS或TPA，化合物4） 6和7）。尽管它们都是溶液相中较差的发射体，但它们在冷凝状态下会变成有效的黄绿色发光剂。在THF / H2O混合物中研究了它们的AIE特性，每个分子在特定的水含量下均表现出明显的发射增强。使用化合物4作为增益材料制造了全有机分布反馈（DFB）激光器，其平均阈值能量通量为60±6μJ/ cm2，并且在绿色区域发射。此外，对这种材料的薄膜进行的压氟致变色研究表明，放大的自发发射（ASE）峰位置与施加的压力呈线性关系，表明其可能作为基于激光的压力传感器。©2016作者。高分子科学杂志A部分：高分子化学，由Wiley Periodicals，Inc.出版，J。Polym。科学，A部分：Polym。化学 2017，55，734-746。表明潜在的应用作为基于激光的压力传感器。©2016作者。高分子科学杂志A部分：高分子化学，由Wiley Periodicals，Inc.出版，J。Polym。科学，A部分：Polym。化学 2017，55，734-746。表明潜在的应用作为基于激光的压力传感器。©2016作者。高分子科学杂志A部分：高分子化学，由Wiley Periodicals，Inc.出版，J。Polym。科学，A部分：Polym。化学 2017，55，734-746。