Fluorene-containing tetraphenylethylene molecules as lasing materials.
Fluorene-containing tetraphenylethylene molecules as lasing materials.
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DOI：
10.1002/pola.28421
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发表时间：
2017-02-15
期刊：
影响因子：
--
通讯作者：
Skabara PJ
中科院分区：
文献类型：
--
作者：
Orofino C;Foucher C;Farrell F;Findlay NJ;Breig B;Kanibolotsky AL;Guilhabert B;Vilela F;Laurand N;Dawson MD;Skabara PJ
一系列星星形低聚芴分子，每个都包含一个TPE核，经过专门设计和生产，以显示有效的聚集诱导发射（AIE）。每个分子在臂内芴单元的数量上不同（例如，1或4，化合物4和5），或位于每个臂末端的端基（例如，H、TMS或TPA，化合物4、6和7）。虽然它们在溶液相中都是差的发光体，但它们在凝聚态下成为有效的黄绿色发光体。在THF/H2O混合物中研究了它们的AIE性质，每个分子在特定的水含量下表现出明显的发光增强。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，并表现出60 ± 6 μJ/cm 2的平均阈值能量通量和在绿色区域中的发射。此外，对这种材料薄膜的压致荧光研究显示，放大自发辐射（ASE）峰位置与施加的压力呈线性关系，这表明它可能用作基于激光的压力传感器。© 2016作者。Journal of Polymer Science Part A：Polymer Chemistry出版社：Wiley Periodicals，Inc. J.波利姆科学，A部分：聚合物2017，55，734-746
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
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