Liquid Crystal Assembly for Ultra-dissymmetric Circularly Polarized Luminescence and Beyond,Journal of the American Chemical Society

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Liquid Crystal Assembly for Ultra-dissymmetric Circularly Polarized Luminescence and Beyond
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2023-06-05 , DOI: 10.1021/jacs.3c01122
Yue Wu _{1,

2} , Mengqi Li ₁ , Zhi-Gang Zheng ₃ , Zhen-Qiang Yu ₂ , Wei-Hong Zhu ₁

Affiliation

Circularly polarized luminescence (CPL) is attracting much interest because it can carry extensive optical information. CPL shows left- or right-handedness and can be regarded as part of high-level visual perception to supply an extra dimension of information with regard to regular light. A key to meeting the needs for practical applications is to develop the emerging field of ultra-dissymmetric CPL. Chiral liquid crystal (LC) assemblies─otherwise referred to as cholesteric liquid crystals (CLCs)─are essentially organized helical superstructures with a highly ordered one-dimensional orientation, and distinctly superior to regular helical supramolecules. CLCs can achieve a perfect equilibrium of molecular short-range interaction and long-range orientational order, enabling molecule-scale chirality on a helical pitch and observable scale. LC assembly could be an ideal strategy for amplifying chirality, making it accessible to ultra-dissymmetric CPL. Herein, we focused on some basic but important issues regarding CPL: (i) How can CPL be created from chiral dyes? (ii) Is the chirality of luminescent dyes an essential factor for the generation of CPL? That is, can all chiral dyes emit CPL and vice versa? (iii) How can CPL be transferred within intermolecular systems, and what principles of CPL transmission should be followed? Given these queries and our work, in this Perspective we discuss the generation, transmission, and modulation of CPL with chiral LC assembly, aiming to design and build up novel chiroptical materials. Recent applications of CPL-active LC microstructures in three-dimensional displays, circularly polarized lasers, and asymmetric catalysis are also discussed.

中文翻译：

用于超不对称圆偏振发光及其他发光的液晶组件

圆偏振发光（CPL）由于可以携带广泛的光学信息而引起了人们的广泛兴趣。CPL 显示左撇子或右撇子，可以被视为高级视觉感知的一部分，以提供有关常规光的额外维度的信息。满足实际应用需求的关键是发展超不对称CPL这一新兴领域。手性液晶 (LC) 组件（也称为胆甾型液晶 (CLC)）本质上是具有高度有序一维取向的螺旋超结构，明显优于常规螺旋超分子。CLC可以实现分子短程相互作用和长程取向顺序的完美平衡，从而在螺距和可观察尺度上实现分子尺度手性。LC 组装可能是放大手性的理想策略，使其可用于超不对称 CPL。在此，我们重点关注有关 CPL 的一些基本但重要的问题：（i）如何从手性染料制备 CPL？(ii) 发光染料的手性是产生CPL的重要因素吗？也就是说，所有手性染料都可以发射 CPL，反之亦然吗？(iii) CPL如何在分子间体系内传递，CPL传递应遵循哪些原则？鉴于这些问题和我们的工作，在本视角中，我们讨论了使用手性 LC 组件产生、传输和调制 CPL，旨在设计和构建新型手性光学材料。还讨论了 CPL 活性液晶微结构在三维显示器、圆偏振激光和不对称催化中的最新应用。

更新日期：2023-06-05

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