Cyclic Triimidazole Derivatives: Intriguing Examples of Multiple Emissions and Ultralong Phosphorescence at Room Temperature
Cyclic Triimidazole Derivatives: Intriguing Examples of Multiple Emissions and Ultralong Phosphorescence at Room Temperature
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DOI：
10.1002/anie.201710279
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发表时间：
2017-12-18
影响因子：
16.6
通讯作者：
Cariati, Elena
中科院分区：
文献类型：
--
作者：
Lucenti, Elena;Forni, Alessandra;Cariati, Elena
固体发光材料的性能既取决于其固有的电子特性，也取决于其包装状态。分子间相互作用已被利用来实现持久的室温磷光（RTP）从有机分子。然而，具有明亮RTP的有机材料的设计和显色间电子耦合作用的合理化仍然是具有挑战性的任务。环三咪唑由于其结晶诱导的室温超长磷光（RTUP）与h聚集有关，已被证明是一种很有前途的支架。在这里，我们报告了三个三咪唑衍生物作为多方面排放的重要例子。特别是观察到分子和超分子单位的双荧光、RTUP和磷光。h -聚集导致红色RTUP， Br取代基有利于黄色分子磷光，而卤素键结的Br中心点中心点Br四聚体单元参与蓝绿色磷光。
The performance of solid luminogens depends on both their inherent electronic properties and their packing status. Intermolecular interactions have been exploited to achieve persistent room-temperature phosphorescence (RTP) from organic molecules. However, the design of organic materials with bright RTP and the rationalization of the role of interchromophoric electronic coupling remain challenging tasks. Cyclic triimidazole has been shown to be a promising scaffold for such purposes owing to its crystallization-induced room-temperature ultralong phosphorescence (RTUP), which has been associated with H-aggregation. Herein, we report three triimidazole derivatives as significant examples of multifaceted emission. In particular, dual fluorescence, RTUP, and phosphorescence from the molecular and supramolecular units were observed. H-aggregation is responsible for the red RTUP, and Br substituents favor yellow molecular phosphorescence while halogen-bonded Br center dot center dot center dot Br tetrameric units are involved in the blue-green phosphorescence.