Hexaphenylbenzene-Based, π-Conjugated Snowflake-Shaped Luminophores: Tunable Aggregation-Induced Emission Effect and Piezofluorochromism
Hexaphenylbenzene-Based, π-Conjugated Snowflake-Shaped Luminophores: Tunable Aggregation-Induced Emission Effect and Piezofluorochromism
复制标题
基于六苯基苯的π共轭雪花形发光体：可调谐聚集诱导发射效应和压电荧光变色
DOI：
10.1002/chem.201406311
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发表时间：
2015-06-01
影响因子：
4.3
通讯作者：
Wang, Jin-Liang
中科院分区：
文献类型：
--
作者：
Chang, Zheng-Feng;Jing, Ling-Min;Wang, Jin-Liang
本研究采用6次Suzuki偶联反应，制备了两种刚性的、多四苯乙烯（TPE）取代的、共轭的、雪花状的发光基团BT和BPT。这些分子是基于螺旋桨形状的六苯基苯（HPB）或苯为核基，TPE为端基的非平面结构构建的。因此，它们保留了TPE部分固有的聚集诱导发射（AIE）特性。同时，可以通过改变扭转构象插入苯基桥来调节或切换固态中的荧光量子产率和压致变色行为。与BT相比，BPT具有更强的AIE效应和更高的固态phi(F， F)，并且实现了这些分子在光波导中的良好应用。然而，只有当BT用杵研磨并用溶剂处理时，才出现了可修正的压电荧光变色行为。
In this work, two rigid, multiple tetraphenylethene (TPE)-substituted, -conjugated, snowflake-shaped luminophores BT and BPT were facilely synthesized by using a 6-fold Suzuki coupling reaction. These molecules are constructed based on the nonplanar structure of propeller-shaped hexaphenylbenzene (HPB) or benzene as core groups and TPE as end groups. As a result, they reserve the intrinsic aggregation-induced emission (AIE) property of the TPE moiety. Meanwhile, both fluorescence quantum yield and piezochromic behavior in the solid state can be tuned or switched by inserting the phenyl bridges through changing the twisting conformation. The more extended structure BPT showed a much stronger AIE effect and higher phi(F,f) in the solid state in comparison with that of BT. Furthermore, an excellent optical waveguide application of these molecules was achieved. However, the revisable piezofluorochromic behavior has only appeared when BT was ground using a pestle and treated with solvent.