液晶嵌段共聚物中超分子组装：从分子手性到聚集态手性

本项目旨在设计、合成和组装一系列具有手性传递和放大功能的液晶嵌段共聚物，通过氢键、卤键超等分子作用以及线性共聚合等方法，将具有分子手性的小分子引入到非手性的液晶嵌段共聚物体系中，以获得具有光响应特性且具有螺旋纳米结构的聚合物薄膜。通过各种结构分析、热分析、微纳显微技术、旋光分析等多种现代测试技术，系统地研究这些液晶与高分子复合材料的手性传递和放大行为，研究液晶嵌段共聚物的液晶相的种类、液晶组分、手性小分子的掺杂比例与分布、分子结构、液晶自组装等之间的作用规律对于手性传递行为的影响，并探索分子设计、结构设计与聚集态螺旋结构之间的关系，以及探索这些螺旋纳米结构在手性材料与器件方面应用的可能性。通过本项目的实施，将做出一批在国际上具有重要影响的研究工作，并获得原创性的具有自主知识产权的研究成果。

The objective of this project is to design, synthesize and fabricate a series of liquid-crystalline block copolymer (LCBC) materials functionalized with chirality transfer and amplification. By combination of living polymerization and hydrogen-bond or halogen-bond supramolecular assembly, chiral small molecules can be introduced into the designed non-chiral LCBCs. Thus, polymer film with photocontrollable chiral nanostructures can be fabricated. Through various characterization methods like structural analysis, thermal analysis, microscopic techniques, mechanical measurement, circular dichroism spectra and other modern analytical methods, the chirality transfer and amplification behaviors will be systematically studied in the LCBC composites. Furthermore, other influence factors like the kind of liquid crystals, the mesogenic ratio in the LCBC, the amount and distribution of chiral molecules, the molecular structures and liquid crystalline assembly will also be investigated. The relationship among the molecular structure, material design and chirality of aggregates will be explicated. Based on these results, the potential applications in chiral materials and related device fabrication will be investigated. This project will lead to research works with significant impact in the international scientific community as well as creative research achievements with our own rights of intellectual property.