超螺旋硼氮杂手性共轭分子的合成与性质研究

圆偏振发光（CPL）材料因在3D光学显示、分子光开关、CPL激光等众多领域的应用前景而受到广泛关注，成为手性发光材料领域的前沿课题。目前手性发光材料较少，且多数难以兼顾高发光不对称因子和高发光量子效率，成为该研究领域的关键性问题。本项目拟利用螺烯优良的手性光学性质和硼、氮杂原子可调控多环芳烃发光性能的特性，以光学纯的[6]螺烯衍生物为原料，合成一类具有螺旋拓扑结构的硼氮杂手性共轭小分子。在此基础之上，通过“自下而上”的合成策略，构筑一类超螺旋硼氮杂手性共轭分子。该类材料旨在保持硼氮杂多环芳烃强发光性能的同时，通过多个螺烯单元的协同作用实现手性信号的放大，最终发展一类具有高发光不对称因子和高发光量子效率的超螺旋硼氮杂圆偏振发光材料，揭示其构效关系，为该类材料的设计提供思路。本项目将有助于丰富硼氮杂手性共轭分子体系，掌握其结构与性质之间的关系，并为其实际应用奠定理论和物质基础。

Circularly polarized luminescence (CPL) materials have attracted extensive attention due to their application prospects in many fields, such as three-dimension optical displays, molecular photoswitches and CPL lasers, and have become a frontier topic in the field of chiral luminescent materials. There are few chiral materials at present, and most of them are difficult to balance high luminescence dissymmetry factor and high luminescence quantum efficiency, which has become a key issue in this research field. This project intends to synthesize a class of B,N-doped chiral conjugated small molecules with helical topology using optically pure [6]helicene derivatives as raw materials by taking advantage of the excellent chiroptical properties of helicenes and the properties of boron (B), nitrogen (N) heteroatoms that can regulate the luminescence properties of polycyclic aromatic hydrocarbons. On this basis, a “bottom-up” synthesis strategy is used to construct a class of superhelical B,N-doped chiral conjugated molecules, which are designed to maintain the strong luminescent properties of B,N-doped polycyclic aromatic hydrocarbons while realizing the amplification of chiral signals through the synergistic effect of multiple helicene units. Finally, a class of superhelical B,N-doped circularly polarized luminescence materials with high luminescence asymmetry factor and high luminescence quantum efficiency is developed, revealing its structure-property relationship, and providing ideas for the design of this type of material. This project will help to enrich the B,N-doped chiral conjugated molecular systems, master the relationship between their structures and properties, and lay a theoretical and material foundation for their practical application.