Aggregation-induced emission based on a fluorinated macrocycle: visualizing spontaneous and ultrafast solid-state molecular motions at room temperature via FMIDLINE HORIZONTAL ELLIPSISF interactions

作者：Zhang, Mei; Guo, Jingjing; Liu, Tingting; He, Zhanyu; Irfan, Majeed; Zhao, Zujin^*; Zeng, Zhuo^*

来源：Journal of Materials Chemistry C, 2020, 8(42): 14919-14924.

DOI：10.1039/d0tc03797d

• TETRAPHENYLETHYLENE DERIVATIVES
• MECHANOLUMINESCENCE
• QUANTIFICATION
• RESTRICTION
• POLYMERS

We for the first time report the efficient construction of novel tetraphenethylene (TPE)-based macrocycles with various mechanofluorochromism (MFC) behaviors involving solid-state molecular motions. We were able to facilely regulate the diverse solid-state molecular motion behaviors of 18-33-membered macrocycles by adjusting the sizes and shapes of the macrocycle rings. Notably, the building of an intermolecular 6-membered ring between two 20-membered fluorinated macrocycles via FMIDLINE HORIZONTAL ELLIPSISF interactions afforded macrocycle 6F-2, which exhibited changes in MFC behaviors that could be rapidly reversed, i.e., within 100 seconds, at room temperature. X-ray structural analysis supported the unique role of fluorinated macrocycles in self-reversible MFC and the emission variation, particularly, in visualization of solid-state molecular motion.