超分子组装体激发态手性的响应性

Responsiveness of Excited State Chirality Based on Supramolecular Assembly

圆偏振发光主要是指手性发光体系激发态的性质。由于其在信息加密、高分辨3D显示和智能传感器等领域的潜在应用而备受关注。圆偏振光除了可以通过物理方法获得,即使用线偏振片和四分之一波片的组合,还可以直接从具有光致发光或电致发光性质的手性材料中获得。目前研究者们已经开发了多种圆偏振发光材料,主要包括手性有机分子、手性金属配合物等小分子发光体系以及手性超分子组装体等复合体系。通过将手性组分与响应性功能基团结合而构筑的响应性自组装发光体系对实现智能圆偏振发光材料的发展起着重要作用。在这篇文章里,我们对手性超分子自组装发光体系对各种外界刺激的响应性能进行了总结和归纳,如光照、pH值、溶剂、温度、金属离子等。本综述通过对各种外部刺激对手性组装体激发态性能影响的总结和讨论,旨在进一步推动智能圆偏振发光材料在多学科领域的应用。

Circularly polarized luminescence(CPL) as one of the optical properties of chiral materials, referring to the excited state properties of the chiral systems, has attracted much attention due to their potential applications in information encryption, high-resolution 3D displays and smart sensors. Besides the optical methods by applying a liner polarizer and a quarter waveplates, circularly polarized light could also be directly generated from chiral luminescent systems under excitation with photoluminescence or electroluminescence. Thus, a variety of CPL-active materials have been developed, including small molecular luminescence systems such as chiral organic molecules and coordination complexes, and chiral supramolecular assemblies. Self-assembly offers a powerful solution to obtaining the CPL-active materials with high quantum yields and dissymmetry factors. Responsive chiral assembled luminescent materials constructed by combining the chiral and responsive components play an important role in the development of intelligent CPL materials, reducing the tedious long synthesis process. Here, we summarize the responsive supramolecular chiroptical systems toward various stimuli, such as light irradiation, pH, solvent, temperature, mental ions, etc. This review is aimed to stimulate further academic and applied research and boost the practical applications of CPL materials in multidisciplinary fields.