Regulation of the Structure and Chiroptical Properties of Chiral Imidazolium Bismacrocycles via Specific Solvents

作者：Xu‐Lang Chen, Zi-You Zheng, Zhao-Yi Cheng, Cai-Yue Zhao, Yang Gao, Tianwei Wang, Chunyang Zheng, Jiaqi Liang, Xin Zhang, Aijiao Guan, Xiaohuan Huang, Han‐Yuan Gong · 发表于：Organic Letters · 年份：2025 · DOI：10.1021/acs.orglett.5c03613 · 被引用次数：3 · 研究领域：Synthesis and Properties of Aromatic Compounds、Molecular Sensors and Ion Detection、Axial and Atropisomeric Chirality Synthesis

Chiral imidazolium-based bismacrocycles exhibiting aggregation-induced emission (AIE) display an unusual, reversible inversion of circular dichroism (CD) signals upon aggregation in 1,4-dioxane solution. In the solid state, exposure to 1,4-dioxane vapor significantly enhances fluorescence intensity and quantum yield, accompanied by a concomitant reversal in CD helicity. These results demonstrate a rare example of solvent-responsive chiroptical switching in macrocyclic AIE systems, driven by aggregation and vapor-induced structural reorganization.