侧链型手性液晶聚合物的设计合成及其圆偏振发光性能研究

手性发光液晶由于在构筑高glum值的圆偏振发光材料方面显示出巨大的优势，逐渐引起了研究人员的关注。目前报道的非掺杂型圆偏发光手性液晶种类少、合成复杂、性能不易调控、固体荧光量子产率低。基于此，本项目结合圆偏振发光材料和侧链型手性液晶聚合物材料的构筑策略，以具有聚集诱导发光增强性质的氰基二苯乙烯为荧光发光液晶基元，胆甾醇等为手性基团来制备两大类具有不同化学结构的圆偏振发光侧链型手性液晶聚合物。利用手性液晶自组装过程实现圆偏振发光glum值的放大，利用氰基二苯乙烯的聚集诱导发光增强性质避免聚合物在聚集态时的荧光猝灭，通过改变聚合物的化学结构来调控聚合物的光物理性质，制备得到具有化学结构简单、性能易调控、glum值大、固体荧光量子产率高的圆偏振发光手性液晶材料。阐明聚合物的化学结构对其聚集态结构和光物理性质的影响规律，揭示其手性的传递和放大机制，为新型高性能圆偏振发光材料的制备提供理论指导。

Chiral luminescent liquid crystals have gradually attracted the attention of researchers due to its great advantages in the construction of circularly polarized luminescent materials with high glum value. At present, there are few kinds of non-doped circularly polarized luminescent chiral liquid crystals, which are complex in synthesis, difficult to regulate in properties and low in solid fluorescence quantum yield. Based on this fact, this project combines the construction strategy of circularly polarized luminescent materials and side chain chiral liquid crystal polymer materials, and takes cyanostilbene with aggregation-induced emission enhancement property as the luminescent mesogen, cholesterol, etc. as the chiral group to prepare two series of different structural circularly polarized luminescent side chain chiral liquid crystal polymers. The self-assembly process of chiral liquid crystals is used to amplify the glum value. The aggregation-induced emission enhancement property of cyanostilbene is used to avoid the fluorescence quenching of the polymers in the aggregation state. The photophysical properties of the polymers are controlled by changing the chemical structure of the polymers. Therefore, circularly polarized luminescent chiral liquid crystals with simple chemical structure, easy to control performance, high glum value and high solid fluorescence quantum yield will be prepared. The influence of the chemical structure on the aggregation structure and photophysical properties of the polymers will be elucidated, and the mechanism of chirality transfer and amplification will be revealed, which provide theoretical guidance for the preparation of new high-performance circularly polarized luminescent materials.