Achieving remarkable mechanochromism and white-light emission with thermally activated delayed fluorescence through the molecular heredity principle.
Achieving remarkable mechanochromism and white-light emission with thermally activated delayed fluorescence through the molecular heredity principle.
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通过分子遗传原理通过热激活延迟荧光实现显着的机械变色和白光发射
DOI：
10.1039/c5sc04155d
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发表时间：
2016-03-01
期刊：
影响因子：
8.4
通讯作者：
Bryce MR
中科院分区：
文献类型：
--
作者：
Xu B;Mu Y;Mao Z;Xie Z;Wu H;Zhang Y;Jin C;Chi Z;Liu S;Xu J;Wu YC;Lu PY;Lien A;Bryce MR
由于分子遗传而产生的不对称分子表现出显着的机械变色和白光发射。用一种结构简单的化合物在温和的条件下实现高对比度机械变色(Δλem，max>；100 nm)和白光发射是一个巨大的挑战。在这里，我们报道了一种新型的双发射化合物，即SCP，它具有不对称的分子结构，完全继承了母体分子SC2和SP2的光物理性质。SCP显示出高对比度、线性可调的机械变色性和由传统荧光和热激活延迟荧光(TADF)相结合产生的明亮的白光发射。通过对白光单晶的分析，论证了SCP晶体产生双发射的原因。此外，还提出了机械力驱动SCP的变色机理。这些观察结果为开发高性能多功能白光发射材料提供了一种合理的设计策略。
An asymmetric molecule created by molecular heredity exhibits remarkable mechanochromism and white-light emission. Achieving high contrast mechanochromism (Δλem,max > 100 nm) and white-light emission under mild conditions from a single compound with a simple structure is a great challenge. Herein, we report a novel dual-emissive compound, namely SCP, with an asymmetric molecular structure that fully inherits the photophysical properties of the parent molecules SC2 and SP2. SCP shows high contrast, linearly tunable mechanochromism and bright white-light emission arising from a combination of traditional fluorescence and thermally activated delayed fluorescence (TADF). The origin of the dual-emission for SCP was demonstrated based on the analysis of the white-emitting single crystals. In addition, a mechanism of luminochromism for SCP driven by the application of mechanical force is proposed. These observations present a rational design strategy for the development of high performance multi-functional materials for white-light emission.
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