基于偶氮苯聚合物的超分子手性开关

The study of chiral polymers has important guiding significance for understanding life processes and preparing smart materials. As a typical photo-responsive chromophore, the introduction of azobenzene groups into chiral polymer systems can endow polymers with optical chirality switch characteristics. Compared with the traditional covalent polymerization by chiral monomers, the use of supramolecular strategy means is a more convenient, efficient and intelligent way to induce polymer chirality. Generally speaking, inducing polymer chirality by supramolecular means can often avoid the use of expensive chiral reagents to save costs, and it can also endow polymer systems with more excellent chirality properties. In recent years, chiral polymers in biomimetic materials, asymmetric catalytic materials and chiral optical devices have shown great application prospects, and promote the interest of scholars in this field. Based on the above background, this paper is classified by the construction methods of azobenzene-based chiral polymers such as chiral monomers, chiral end groups, chiral solvents, chiral gel factors, circularly polarized light and chiral host macrocycles. Then, the effects of different construction strategies on the supramolecular chirality switches are mainly introduced, and the advantages and characteristics of different construction strategies are also summarized. Finally, at the end of this paper, we point out the key scientific issues and challenges in future research of supramolecular chirality switching based on azobenzene polymers.