Development of functional materials capable of exhibiting chirality tunable circularly polarized luminescence (CPL) is currently in high demand for potential technological applications. Herein we demonstrate the formation of both left- and right-handed fluorescent helical superstructures from each enantiomer of a chiral tetraphenylethylene derivative through judicious choice of the solution processing conditions. Interestingly, both the aggregation induced emission active enantiomers exhibit handedness inversion of their supramolecular helical assemblies just by varying the solution polarity without any change in their molecular chirality. The resulting helical supramolecular aggregates from each enantiomer are capable of emitting circularly polarized light, thus enabling both right- and left-handed CPL from a single chiral material. The left- and right-handed supramolecular helical aggregates in the dried films have been characterized using spectroscopy, scanning electron microscopy, and transmission electron microscopy techniques. These new chiral aggregation induced emission compounds could find applications in devices where CPL of opposite handedness is required from the same material and would facilitate our understanding of the formation of helical assemblies with switchable supramolecular chirality.

中文翻译：

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手性聚集诱导发射荧光团中的溶剂极性驱动螺旋反转和圆偏振发光

目前，对于潜在的技术应用，开发能够表现出手性可调圆偏振发光 (CPL) 的功能材料的需求量很大。在这里，我们通过明智地选择溶液处理条件，证明了从手性四苯基乙烯衍生物的每个对映体形成左手和右手荧光螺旋超结构。有趣的是，这两种聚集诱导发射活性对映异构体仅通过改变溶液极性而不改变其分子手性就表现出其超分子螺旋组装体的手性反转。来自每个对映异构体的螺旋超分子聚集体能够发射圆偏振光，从而能够从单一手性材料实现右旋和左旋 CPL。已使用光谱学、扫描电子显微镜和透射电子显微镜技术对干燥薄膜中的左旋和右旋超分子螺旋聚集体进行了表征。这些新的手性聚集诱导发射化合物可以在需要来自相同材料的相反手性 CPL 的设备中找到应用，并将有助于我们理解具有可切换超分子手性的螺旋组件的形成。