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    诱导手性圆偏振发光材料的研究进展

    Recent Progress in Chiral Materials with Induced Circularly Polarized Luminescence

    • 摘要: 圆偏振发光(CPL)材料由于信息密度大和无视角依赖性,在加密存储、生物编码及三维显示等领域具有广泛的应用前景。超分子化学法是构筑CPL材料的主要途径,发光单元在超分子化学组装体中的手性排列是调控CPL材料性能的关键因素。本文从组装体诱导发光单元手性排列、超分子凝胶、介孔模板以及高分子诱导手性组装的角度综述了近年来CPL材料的研究进展,并对这些方法的特点进行了评述。今后,利用模板法来调控CPL材料的性能,特别是提高CPL材料的不对称因子和发光强度仍然是这一领域的重要研究方向,而高分子的可控组装为实现这一目标提供了可能。

       

      Abstract: Because circularly polarized luminescence(CPL) has unique properties including extensive optive information, large-capacity optical information and angular independence, chiral materials with CPL emission present increasing potential for applications in diverse fields such as storage of information, bio-encoding, 3D optical displays and even catalysts for asymmertirc photochemical synthesis. As an important approach, supramolecualar self-assembly can provide a convenient method to construct the CPL materials by introducing chiral source and achiral fluorescent moleculars into the supramolecular system through different nocovalent interactions (such as π-π stacking, electrostatic interactions and hydrogen bonding). The chiral arrangement of the luminescent units in the assembly plays a key role in controlling the CPL emission (including the intensity and sign) of such materials. Although the study of CPL materials lasts several years, an open question that has long been a point of concention is how to achieve the high performance CPL materials. A high degree of dissymmetry ratio is also the urgent challenge. Therefore, it is vital to develop effective ways for the CPL materials with the high dissymmetry factor. In this review, we focus on the present progress on the chiral materialswith induced CPL emission by using template including chiral gel nanotube, mesoporous template, liquid crystalline polymer and helix formed by polymer. The dissymmetric factor and luminescent intensity of the obtained CPL materials in different assemblies were intensively discussed depending on different templates. We also present some perspective on the development of the induced CPL materials and the future application.

       

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