Manipulation of Molecular Aggregation States to Realize Polymorphism, AIE, MCL, and TADF in a Single Molecule
Manipulation of Molecular Aggregation States to Realize Polymorphism, AIE, MCL, and TADF in a Single Molecule
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DOI：
10.1002/anie.201806800
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发表时间：
2018-09-17
影响因子：
16.6
通讯作者：
Lee, Chun-Sing
中科院分区：
文献类型：
--
作者：
Huang, Bin;Chen, Wen-Cheng;Lee, Chun-Sing
多功能发光材料是稀缺的，需要进一步探索。目前，我们设计并合成了一种新的蒽醌衍生物2-（吩噻嗪-10-基）-蒽醌（PTZ-AQ），并发现其在不同的固体形态下表现出多态性、多色发光、聚集诱导发光（AIE）、机械致变色发光（MCL）和热激活延迟荧光（TADF）。它是第一次表明，TADF性能的化合物可以通过其聚集态系统地调整。优化的PTZ-AQ晶体显示出0.01 eV的小的单重态-三重态能量分裂，并表现出红色TADF，光致发光量子产率高达0.848。该研究表明，通过控制聚集态，可以将独特的多功能性整合到单一化合物中，为多功能有机材料的研究和应用提供了新的思路。
Multifunctional emitting materials are scarce and need to be further explored. Now, a newly anthraquinone derivative, 2-(phenothiazine-10-yl)-anthraquinone (PTZ-AQ) was designed and synthesized and found to demonstrate polymorphism, multi-color emission, aggregation-induced emission (AIE), mechanochromic luminescence (MCL), and thermally activated delayed fluorescence (TADF) in its different solid forms. It is shown for the first time that TADF properties of a compound can be systematically tuned via its aggregation state. The optimized PTZ-AQ crystal shows a small singlet-triplet energy splitting of 0.01 eV and exhibits red TADF with a photoluminescence quantum yield as high as 0.848. This study shows that the unique multiple functions can be integrated into one single compound through controlling the aggregation states, which provides a new strategy for the investigation and application of multifunctional organic materials.