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    郭玉权, 贺子翔, 程笑笑, 张 弓, 缪腾飞, 张 伟. 非手性液晶聚合物中超分子手性结构的诱导与光照固定[J]. 功能高分子学报,2023,36(1):21-30. doi: 10.14133/j.cnki.1008-9357.20220723001
    引用本文: 郭玉权, 贺子翔, 程笑笑, 张 弓, 缪腾飞, 张 伟. 非手性液晶聚合物中超分子手性结构的诱导与光照固定[J]. 功能高分子学报,2023,36(1):21-30. doi: 10.14133/j.cnki.1008-9357.20220723001
    GUO Yuquan, HE Zixiang, CHENG Xiaoxiao, ZHANG Gong, MIAO Tengfei, ZHANG Wei. Induction and Photo-Locking of Supramolecular Chiral Structures in Achiral Liquid Crystalline Polymers[J]. Journal of Functional Polymers, 2023, 36(1): 21-30. doi: 10.14133/j.cnki.1008-9357.20220723001
    Citation: GUO Yuquan, HE Zixiang, CHENG Xiaoxiao, ZHANG Gong, MIAO Tengfei, ZHANG Wei. Induction and Photo-Locking of Supramolecular Chiral Structures in Achiral Liquid Crystalline Polymers[J]. Journal of Functional Polymers, 2023, 36(1): 21-30. doi: 10.14133/j.cnki.1008-9357.20220723001

    非手性液晶聚合物中超分子手性结构的诱导与光照固定

    Induction and Photo-Locking of Supramolecular Chiral Structures in Achiral Liquid Crystalline Polymers

    • 摘要: 超分子手性结构由于其形成所需的非共价相互作用力较弱,因此极易在外界条件刺激下发生解离,从而导致手性消失。在绝大多数情况下,以非手性单元为组装模块的组装体系中超分子手性结构在外部环境刺激下被破坏后无法恢复。为了提高超分子手性结构的稳定性,克服其对原有手性源的依赖性,设计合成了一种侧链型非手性苯甲酸苯酯液晶聚合物,在聚合物侧链末端引入肉桂酸结构作为交联基团。将手性柠檬烯的手性诱导与简单的光照交联结合即可实现超分子手性的共价键固定,极大地简化了交联过程,为手性材料的制备与手性信息存储提供了新的策略。

       

      Abstract: Supramolecular chirality usually plays an important role in biological processes and living systems. A novel achiral liquid crystalline polymer where the molecular chirality can be transferred is described, which provides a simple method to realize the chiral selfassembly in achiral polymer systems. However, the supramolecular chiral structures are often easily destroyed by external stimulus due to the weak non-covalent interactions between building blocks, which limits the application of the chiral supramolecular materials to a large extent. In the most systems composed of achiral precursors, the destroyed chiral ordered structures cannot be recovered in the absence of the pre-chiral resource. In order to improve the stability of supramolecular chiral structure and overcome its strong dependence on the chiral resource, a series of achiral liquid crystalline polymers containing phenyl benzoate groups as the mesogens and cinnamic acid groups as the cross-linkable center in the polymer side-chains are designed and synthesized. Combining with the induction of chiral limonene and photo-crosslinking, the supramolecular chirality constructed from achiral polymers can be permanently memorized in a simple way. Even when the helical structure is destroyed by polar solvent or high temperature, the memorized chiral information enables the complete self-recovery behavior without any pre-chiral resource. The current research will provide a new strategy for the preparation of chiral supramolecular materials with stored chiral information.

       

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