Reversible Switching between Phosphorescence and Fluorescence in a Unimolecular System Controlled by External Stimuli,Chemistry - A European Journal

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Reversible Switching between Phosphorescence and Fluorescence in a Unimolecular System Controlled by External Stimuli
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-08-02 , DOI: 10.1002/chem.201801739
Jing Xu ₁ , Hui Feng ₁ , Hao Teng ₁ , Guilin Chen ₁ , Saifei Pan ₁ , Jianrong Chen ₁ , Zhaosheng Qian ₁

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Manipulation of the emission properties of pure organic molecules through external stimuli is attractive but challenging. Herein, a dual‐emissive hexathiobenzene‐based molecule is reported with significant aggregation‐induced phosphorescence characteristics, and demonstrates reversible switching among blue, green, and yellow phosphorescence by controlling molecular aggregation state or protonation state. Variation of solvent or pH value manipulates the interconversion between fluorescence and phosphorescence, while the change in protonation state in organic solvent switches two short‐lived emissions in a controllable manner. Such a controlled manipulation is achieved by the rational design of combining a twisted structure and the proper arrangement of energy gaps among different excited states. This work provides a new design principle for organic molecules with efficient room‐temperature phosphorescence and tunable singlet–triplet emissive properties, and contributes to the design and development of smart materials and intelligent optoelectronic devices.

中文翻译：

在外部刺激控制的单分子系统中，磷光与荧光之间的可逆转换

通过外部刺激操纵纯有机分子的发射特性是有吸引力的，但具有挑战性。在本文中，据报道具有基于双发射六硫代苯的分子具有明显的聚集诱导的磷光特性，并通过控制分子聚集状态或质子化状态证明了蓝色，绿色和黄色磷光之间的可逆转换。溶剂或pH值的变化控制了荧光和磷光之间的相互转换，而有机溶剂中质子状态的变化以可控的方式切换了两个短寿命的发射。通过将扭曲的结构与不同激发态之间能隙的适当布置相结合的合理设计，可以实现这种受控操纵。

更新日期：2018-08-02

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