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Aggregation-induced emission enhancement (AIEE)-active boron-difluoride dyes with reversible mechanochromic fluorescence

机译:聚集诱导的发射增强(AIEE) - 具有可逆机械光学荧光的致硼 - 二氟化染料

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摘要

A novel class of solid-emissive boron-difluoride derivatives, using phenanthrenequinone hydrazone as ligands, were designed and efficiently synthesized. These dyes exhibit weak fluorescence in dilute solutions, but much higher fluorescence efficiency in aggregate states with a large stokes shift (over 70 nm) due to the their aggregation-induced emission enhancement (AIEE) characteristics. According to their photophysical properties and X-ray single crystal structure analysis, the AIEE was ascribed to the H(J)-aggregate formation aided by multiple intermolecular interactions to restrict intramolecular motion in the solid state. Moreover, their solid emissions could be reversibly tuned between "on" and "off" by mechanical grinding and recrystallization, due to the stacking model transition between H(J)-aggregation with loose molecular packing and J-aggregation with intense intermolecular interactions.
机译:设计和有效地合成了使用菲醌腙作为配体的菲醌腙的一种新型固体发光硼 - 二氟化衍生物。 这些染料在稀释溶液中表现出弱荧光,但由于其聚集诱导的发射增强(AIEE)特征,Zerokes Zerokes(超过70nm以上)的聚集状态中的荧光效率大得多。 根据它们的光学性质和X射线单晶结构分析,通过多分子间相互作用来限制固态的分子间运动来归因于H(j)-aggreggate的形成。 此外,由于H(j) - 聚集与具有强烈分子间相互作用的松散分子填充和j聚集的堆叠模型转变,可以通过机械研磨和重结晶在“开启”和“OFF”之间可逆地调谐它们的固体排放。

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    《RSC Advances》 |2019年第61期|共6页
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  • 正文语种 eng
  • 中图分类 化学;
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