State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Molecules. 2017 Oct 10;22(10):1679. doi: 10.3390/molecules22101679.
Aggregation-induced emission (AIE) has become a hot research area and tremendous amounts of AIE-active luminogens (AIEgens) have been generated. To further promote the development of AIE, new AIEgens are highly desirable. Herein, new AIEgens based on tetraphenylpyrimidine (TPPM) are rationally designed according to the AIE mechanism of restriction of intramolecular motion, and facilely prepared under mild reaction conditions. The photophysical property of the generated TPPM, TPPM-4M and TPPM-4P are systematically investigated and the results show that they feature the aggregation-enhanced emission (AEE) characteristics. Theoretical study shows the high-frequency bending vibrations in the central pyrimidine ring of TPPM derivatives dominate the nonradiative decay channels. Thanks to the AEE feature, their aggregates can be used to detect explosives with super-amplification quenching effects, and the sensing ability is higher than typical AIE-active tetraphenylethene. It is anticipated that TPPM derivatives could serve as a new type of widely used AIEgen based on their facile preparation and good thermo-, photo- and chemostabilities.
聚集诱导发光（AIE）已成为一个热门的研究领域，已经产生了大量的 AIE 活性发光团（AIEgens）。为了进一步推动 AIE 的发展，人们非常希望得到新的 AIEgens。在此，根据限制分子内运动的 AIE 机制，合理设计了基于四苯嘧啶（TPPM）的新型 AIEgens，并在温和的反应条件下轻松制备。系统研究了生成的 TPPM、TPPM-4M 和 TPPM-4P 的光物理性质，结果表明它们具有聚集增强发射（AEE）特性。理论研究表明，TPPM 衍生物中环的高频弯曲振动在非辐射衰变通道中占主导地位。由于具有 AEE 特性，它们的聚集体可用于检测具有超放大猝灭效应的爆炸物，其传感能力高于典型的 AIE 活性四苯乙烯。预计 TPPM 衍生物可以作为一种新型的广泛使用的 AIEgen，因为它们具有易于制备和良好的热、光和化学稳定性。
