期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 46, 页码 24430-24436出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202109084
关键词
azobenzene; chirality; liquid-crystalline polymers; polymerization-induced self-assembly; supramolecular chemistry
资金
- National Nature Science Foundation of China [92056111, 21971180]
- Nature Science Key Basic Research of Jiangsu Province for Higher Education [19KJA360006]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX20_2655]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- Program of Innovative Research Team of Soochow University
By controlling the tail length and degree of polymerization of Azo blocks, the multiple chiroptical inversion of Azo-polymer supramolecular assemblies can be modulated.
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 time-dependent 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 pi-pi stacking, inter-chain H- and J-aggregation, thereby controlling the dynamic multiple reversal of supramolecular chirality.
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