[Angew. Chem. Int. Ed.] Self-Assembly of Adaptive Chiral [1]Rotaxane for Thermo-Rulable Circularly Polarized Luminescence
writer：Xin Song, Xuefeng Zhu,* Shuai Qiu, Wei Tian,* and Minghua Liu*
keywords：Adaptive，Chiroptical Switch，Circularly Polarized Luminescence，Potted Emitter，Thermal Effect
source：期刊
specific source：Angew. Chem. Int. Ed. 2022, 61, e202208574
Issue time：2022年
It remains a formidable challenge to realize thermo-rulable circularly polarized luminescence (CPL). Herein, we propose a new strategy by covalently “potting” the emitter into a flexible chiral macrocycle as an adaptive chiral rotaxane to address this issue. Different from its included analogue, the potted emitter [DS] showed adaptive conformers with tunable CPL in varied solvents. Significantly, upon controlled selfassembly, [DS] formed a channel-type nanoarchitecture ([DS]A), which exhibited an extraordinary thermo-rulable CPL between 25–100°C. Impressively, the glum was large as 0.024 at 25 °C, which was amplified to 0.040 at 90 °C with a decrease of QY (from 92% to 80%). By comparison, the assemblies of cage-type [DS]B and the unpotted emitter showed irreversible or unanswered thermal behaviors. The work demonstrated the thermorulable and durable CPL for the first time and provided an insightful understanding of thermal effect on hightemperature and switchable CPL materials.
全文鏈接：https://doi.org/10.1002/anie.202208574.