Photomechanical Luminescence from Through-Space Conjugated AIEgens.,Angewandte Chemie International Edition

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Photomechanical Luminescence from Through-Space Conjugated AIEgens.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-12-06 , DOI: 10.1002/anie.201913383
Jingjing Guo ₁ , Jianzhong Fan ₂ , Xinzhi Liu ₁ , Zujin Zhao ₁ , Ben Zhong Tang _{1,

3}

Affiliation

Transforming molecular motions into the macroscopic scale is a topic of great interest to nanoscience. The photomechanical effect is a promising strategy to achieve this goal. Herein, we report an intriguing photomechanical luminescence driven by the photodimerization of 2-phenylbenzo[b]thiophene 1,1-dioxide (P-BTO) in molecular crystals and elucidate the working mechanism and substituent effect through crystallographic analysis and theoretical calculations. Striking splitting, hopping, and bending mechanical behaviors accompanied by a significant blue fluorescence enhancement are observed for P-BTO crystals under UV light, which is attributed to the formation of photodimer 2P-BTO. Although 2P-BTO is poorly π-conjugated because of the central cyclobutane ring, it exhibits prominent through-space conjugation and aggregation-induced emission (AIE), affording strong solid-state blue fluorescence at 415 nm with an excellent quantum yield of up to 96.2 %.

中文翻译：

通过空间共轭AIEgens的光机械发光。

将分子运动转化为宏观尺度是纳米科学非常感兴趣的话题。光机械效应是实现该目标的有前途的策略。在本文中，我们报告了由2-苯基苯并[b]噻吩1,1-二氧化物（P-BTO）在分子晶体中的光二聚化驱动的有趣的光机械发光，并通过晶体学分析和理论计算阐明了其工作机理和取代基效应。在紫外光下，P-BTO晶体观察到了明显的分裂，跳跃和弯曲机械行为，并伴有明显的蓝色荧光增强，这归因于光致二聚体2P-BTO的形成。尽管由于中心环丁烷环的缘故，2P-BTO的π共轭性很差，但它仍表现出突出的贯穿空间共轭和聚集诱导发射（AIE），

更新日期：2019-12-06

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