Controlling the Multiple Chiroptical Inversion in Biphasic Liquid- Crystalline Polymers
Xiaoxiao Cheng, Tengfei Miao, Yafei Ma, Xiaoyan Zhu, Wei Zhang*（张伟）, and Xiulin Zhu
Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University，Suzhou, 215123 (China)
Angew. Chem. Int. Ed. 2021, 60, 24430--24436
While controlling the chirality and modulating the helicity is a challenging task, it attracts great research interest for gaining a better understanding of the origin of chirality in nature. Herein, structurally similar azobenzene (Azo) vinyl monomers were designed in which the alkyl chains comprised the chiral stereocenter with different achiral tail lengths. Combining the synchronous polymerization, supramolecular stacking and self-assembly, the multiple chiroptical inversion of the Azo-polymer supramolecular assemblies can be modulated by the tail length and DP of Azo blocks during in situ polymerization. The DP-, UV light-, temperature-, aging timedependent chiroptical properties and liquid-crystalline (LC) characterization indicated that the amorphous-to-LC phase transition and biphasic LC interconversion allow the transcription of intra-chain p–p stacking, inter-chain H- and Jaggregation, thereby controlling the dynamic multiple reversal of supramolecular chirality.
链接：https://onlinelibrary.wiley.com/doi/full/10.1002/anie.202109084