Aggregation-induced emission (AIE) is a unique photophysical process, and its emergence brings a revolutionary change in luminescence. However, AIE-based research has been limited to a few classical molecular skeletons, which is unfavorable for in-depth studies of the photophysical characteristics of AIE and the full exploitation of their potential values. There is an urgent need to develop new skeletons to rise to the challenges of an insufficient number of AIE core structures and difficult modification. Here, we report a novel dumbbell AIE skeleton, in which two phenyls are connected through (E)-3-iminoprop-1-en-1-amine. This skeleton shows extremely strong solid-state emission with an absolute quantum yield up to 69.5%, a large Stokes shift, and typical AIE characteristics, which well resolves the challenge of difficult modification and low luminous efficiency of the traditional AIE skeletons. One-step reaction, high yield, and diversified modification endow the skeleton with great scalability from simple to complicated, or from symmetrical to asymmetrical structures, which establishes the applicability of the skeleton in various scenarios. These molecules self-assemble into highly ordered layer-, rod-, petal-, hollow pipe-, or helix-like nanostructures, which contribute to strong AIE emission. Crystallographic data reveal the highly ordered layer structures of the aggregates with different substituents, and a novel halogen bond-driven self-assembly mechanism that restricts intramolecular motion is clearly discovered. Taking advantage of these merits, a full-band emission system from green to red is successfully established, which displays great potential in the construction of light-emitting films and advanced light-emitting diodes. The discovery of this AIE skeleton may motivate a huge potential application value in luminescent materials and lead to hitherto impossible technological innovations.

中文翻译：

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卤素键驱动的聚集诱导发光骨架：N-(3-(苯基氨基)烯丙基)苯胺盐酸盐

聚集诱导发光（AIE）是一种独特的光物理过程，它的出现给发光带来了革命性的变化。然而，基于AIE的研究仅限于少数经典分子骨架，不利于深入研究AIE的光物理特性和充分挖掘其潜在价值。迫切需要开发新的骨架来应对AIE核心结构数量不足和修改难度大的挑战。在这里，我们报告了一个新的哑铃 AIE 骨架，其中两个苯基通过 ( E)-3-亚氨基丙基-1-en-1-胺。该骨架表现出极强的固态发射，绝对量子产率高达69.5%，斯托克斯位移大，具有典型的AIE特性，很好地解决了传统AIE骨架改性难、发光效率低的挑战。一步反应、高产率、多样化的修饰赋予了骨架从简单到复杂、从对称到非对称结构的巨大可扩展性，奠定了骨架在各种场景下的适用性。这些分子自组装成高度有序的层状、棒状、花瓣状、空心管状或螺旋状纳米结构，有助于产生强烈的 AIE 发射。晶体学数据揭示了具有不同取代基的聚集体的高度有序的层结构，并且清楚地发现了一种限制分子内运动的新型卤素键驱动的自组装机制。利用这些优点，成功建立了从绿色到红色的全波段发射体系，在发光薄膜和先进发光二极管的构建方面显示出巨大潜力。这种AIE骨架的发现可能会激发发光材料的巨大潜在应用价值，并导致迄今为止不可能的技术创新。