Circularly Polarized Fluorescence Energy Transfer for Constructing Multicolor Circularly Polarized Luminescence Films with Controllable Handedness,Chemistry of Materials

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Circularly Polarized Fluorescence Energy Transfer for Constructing Multicolor Circularly Polarized Luminescence Films with Controllable Handedness
Chemistry of Materials ( IF 7.2 ) Pub Date : 2023-01-15 , DOI: 10.1021/acs.chemmater.2c03322
Kai Yang _{1,

2} , Shuo Ma ₁ , Youping Wu ₂ , Biao Zhao ₁ , Jianping Deng ₁

Affiliation

Utilizing achiral fluorophores to fabricate circularly polarized luminescence (CPL) materials is of significant importance in both fundamental research and practical applications; chirality transfer has become an indispensable process in routine efforts reported so far. However, this may restrict or even become a bottleneck in further advancing CPL materials starting from achiral fluorophores. Inspired by biological light-harvesting architectural systems, we attempt to establish a new strategy, i.e., circularly polarized fluorescence energy transfer (CPF-ET) to explore multicolor CPL films in the absence of chirality transfer. CPL has been successfully realized through both radiative energy transfer and nonradiative energy transfer. The material systems consist of chiral fluorescent helical polyacetylene working as a circularly fluorescence polarized energy donor and achiral fluorophores as an energy acceptor. Achiral acceptors absorb circularly polarized fluorescence energy from the donor and hence emit the corresponding CPL; accordingly, chirality transfer is no longer an indispensable condition, and the sense of the CPL emission of the achiral fluorophores is controlled by the chiral fluorescent polymer. Moreover, multicolor CPL films can be simply prepared by employing varying achiral fluorophores. This work provides a facile and versatile platform for achieving CPL by taking advantage of achiral fluorophores.

中文翻译：

圆偏振荧光能量转移构建旋向性可控多色圆偏振发光薄膜

利用非手性荧光团制备圆偏振发光 (CPL) 材料在基础研究和实际应用中都具有重要意义；迄今为止，手性转移已成为常规工作中不可或缺的过程。然而，这可能会限制甚至成为进一步推进以非手性荧光团为起点的 CPL 材料的瓶颈。受生物光捕获结构系统的启发，我们尝试建立一种新策略，即圆偏振荧光能量转移 (CPF-ET)，以在没有手性转移的情况下探索多色 CPL 薄膜。CPL已通过辐射能量转移和非辐射能量转移成功实现。该材料系统由作为圆荧光偏振能量供体的手性荧光螺旋聚乙炔和作为能量受体的非手性荧光团组成。非手性受体从供体吸收圆偏振荧光能量，从而发射相应的 CPL；相应地，手性转移不再是不可或缺的条件，非手性荧光团的CPL发射方向由手性荧光聚合物控制。此外，可以通过使用不同的非手性荧光团来简单地制备多色 CPL 薄膜。这项工作为利用非手性荧光团实现 CPL 提供了一个简便且通用的平台。非手性受体从供体吸收圆偏振荧光能量，从而发射相应的 CPL；相应地，手性转移不再是不可或缺的条件，非手性荧光团的CPL发射方向由手性荧光聚合物控制。此外，可以通过使用不同的非手性荧光团来简单地制备多色 CPL 薄膜。这项工作为利用非手性荧光团实现 CPL 提供了一个简便且通用的平台。非手性受体从供体吸收圆偏振荧光能量，从而发射相应的 CPL；相应地，手性转移不再是不可或缺的条件，非手性荧光团的CPL发射方向由手性荧光聚合物控制。此外，可以通过使用不同的非手性荧光团来简单地制备多色 CPL 薄膜。这项工作为利用非手性荧光团实现 CPL 提供了一个简便且通用的平台。

更新日期：2023-01-15

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