Song Jing-Lin, Chen Chao, Li Xue, Jiang Yefei, Peng Zhiyong, Wang Xu-Qing, Yang Hai-Bo, Wang Wei
School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China.
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular and Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China.
Nat Commun. 2024 Dec 3;15(1):10531. doi: 10.1038/s41467-024-54961-0.
Attributed to their unique dynamic planar chirality, pillar[n]arenes, particularly pillar[5]arenes, have evolved as promising platforms for diverse applications such as circularly polarized luminescence (CPL) emitters. However, due to the unit flipping and swing, the achievement of excellent CPL performances of pillar[5]arenes in solution state remains a formidable challenge. To deal with this key issue, a mechanically locking approach has been successfully developed, leading to boosted dissymmetry factor (g) values of pyrene-tiaraed pillar[5]arenes up to 0.015 through the formation of corresponding [2]rotaxanes. More importantly, taking advantage of the stably locked co-conformers, these resultant [2]rotaxanes maintain excellent CPL performances in diverse solvents and wide range of concentrations, making them promising candidates for practical applications. According to this proof-of-concept study, we have not only successfully developed a powerful strategy for the rational design of chiral luminescent materials with desired CPL performances but also contributed a promising platform for the construction of smart chiral materials.
由于其独特的动态平面手性，柱芳烃，尤其是柱[5]芳烃，已发展成为用于多种应用（如圆偏振发光（CPL）发射器）的有前景的平台。然而，由于单元翻转和摆动，在溶液状态下实现柱[5]芳烃的优异CPL性能仍然是一项艰巨的挑战。为了解决这个关键问题，一种机械锁定方法已被成功开发，通过形成相应的[2]轮烷，芘-冠状柱[5]芳烃的不对称因子（g）值提高到0.015。更重要的是，利用稳定锁定的共构象体，这些所得的[2]轮烷在多种溶剂和宽浓度范围内保持优异的CPL性能，使其成为实际应用的有前景的候选物。根据这项概念验证研究，我们不仅成功开发了一种强大的策略，用于合理设计具有所需CPL性能的手性发光材料，而且还为构建智能手性材料贡献了一个有前景的平台。
