Very bright mechanoluminescence and remarkable mechanochromism using a tetraphenylethene derivative with aggregation-induced emission.
Very bright mechanoluminescence and remarkable mechanochromism using a tetraphenylethene derivative with aggregation-induced emission.
复制标题
使用具有聚集诱导发射的四苯乙烯衍生物，具有非常明亮的机械发光和显着的机械致变色性
DOI：
10.1039/c5sc00466g
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发表时间：
2015-05-01
期刊：
影响因子：
8.4
通讯作者：
Xu J
中科院分区：
文献类型：
--
作者：
Xu B;He J;Mu Y;Zhu Q;Wu S;Wang Y;Zhang Y;Jin C;Lo C;Chi Z;Lien A;Liu S;Xu J
两种光致发光晶型表现出不同的机械发光活性和机械变色行为。具有机械发光特性的有机材料在显示、照明和传感等领域具有广阔的应用前景。然而，ML的产生机制尚不清楚，有机ML材料在固态时的发光性能受到聚集猝灭(ACQ)效应的严重限制。在这里，我们提出了两个强烈的光致发光晶型(即CG和CB)，具有明显不同的ML活性基于四苯乙烯衍生物P4TA。作为聚集诱导发射(AIE)的发射体，P4TA完美地超越了ACQ，使CG相中的块状晶体在室温下的日光下呈现明亮的绿色ML。ML不活跃的棱柱状晶体CB也可以通过在二氯甲烷蒸气的帮助下向CG转变来开启其ML。此外，CG多晶型在紫外力刺激下同时表现出ML和机械变色，为开发高效、多功能的ML材料提供了一个可行的设计方向。
Two photoluminescent polymorphs exhibit different mechanoluminescence activities and mechanochromic behaviors. Organic materials exhibiting mechanoluminescence (ML) are promising for usage in displays, lighting and sensing. However, the mechanism for ML generation remains unclear, and the light-emitting performance of organic ML materials in the solid state has been severely limited by an aggregation-caused quenching (ACQ) effect. Herein, we present two strongly photoluminescent polymorphs (i.e., Cg and Cb) with distinctly different ML activities based on a tetraphenylethene derivative P4TA. As an aggregation-induced emission (AIE) emitter, P4TA perfectly surmounted the ACQ, making the resultant block-like crystals in the Cg phase exhibit brilliant green ML under daylight at room temperature. The ML-inactive prism-like crystals Cb can also have their ML turned on by transitioning toward Cg with the aid of dichloromethane vapor. Moreover, the Cg polymorph shows ML and mechanochromism simultaneously and respectively without and with UV irradiation under a force stimulus, thus suggesting a feasible design direction for the development of efficient and multifunctional ML materials.
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影响因子：
4.6
作者：
Balsamy, Sujitha;Natarajan, Palani;Muralidharan, Srinivasan
通讯作者：
Muralidharan, Srinivasan
影响因子：
8.6
作者：
Sweeting, LM;Rheingold, AL;Kim, TJ
通讯作者：
Kim, TJ
影响因子：
4.6
作者：
Biju, S.;Gopakumar, N.;Reddy, M. L. P.
通讯作者：
Reddy, M. L. P.
影响因子：
64.8
作者：
Eddingsaas, Nathan C.;Suslick, Kenneth S.
通讯作者：
Suslick, Kenneth S.
影响因子：
2.9
作者：
Jakubiak, R;Collison, CJ;Hsieh, BR
通讯作者：
Hsieh, BR