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首页> 外文期刊>Chemistry: A European journal >Aggregation-Induced Emission Rotors: Rational Design and Tunable Stimuli Response
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Aggregation-Induced Emission Rotors: Rational Design and Tunable Stimuli Response

机译：聚集引起的排放转子：合理的设计和可调的激励响应

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摘要

A novel molecular design strategy is provided to rationally tune the stimuli response of luminescent materials with aggregation-induced emission (AIE) characteristics. A series of new AIE-active molecules (AIE rotors) are prepared by covalently linking different numbers of tetraphenylethene moieties together. Upon gradually increasing the number of rotatable phenyl rings, the sensitivity of the response of the AIE rotors to viscosity and temperature is significantly enhanced. Although the molecular size is further enlarged, the performance is only slightly improved due to slightly increased effective rotors, but with largely increased rotational barriers. Such molecular engineering and experimental results offer more in-depth insight into the AIE mechanism, namely, restriction of intramolecular rotations. Notably, through this rational design, the AIE rotor with the largest molecular size turns out to be the most viscosensitive luminogen with a viscosity factor of up to 0.98.
机译：提供了一种新颖的分子设计策略，以合理地调节具有聚集诱导发射（AIE）特性的发光材料的刺激响应。通过将不同数量的四苯基乙烯部分共价连接在一起，可以制备一系列新的AIE活性分子（AIE转子）。随着可旋转苯环数量的逐渐增加，AIE转子对粘度和温度的响应灵敏度大大提高。尽管分子大小进一步扩大，但由于有效转子的略微增加，性能仅略有改善，但旋转势垒却大大增加。此类分子工程和实验结果为AIE机理（即分子内旋转的限制）提供了更深入的见解。值得注意的是，通过这种合理的设计，具有最大分子尺寸的AIE转子被证明是对粘度最敏感的发光剂，其粘度系数高达0.98。

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