文献类型：期刊文献

英文题名：Helical Self-Assembly of Amphiphilic Chiral Azobenzene Alternating Copolymers

作者：Liu, Zhenghui[1];Yao, Yuan[1];Tao, Xinfeng[1];Wei, Jie[1];Lin, Shaoliang[1]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat, Minist Educ,Sch Mat Sci & Engn, Shanghai, Peoples R China

年份：2021

卷号：10

期号：10

起止页码：1174

外文期刊名：ACS MACRO LETTERS

收录：;EI(收录号：20214010982934);WOS:【SCI-EXPANDED(收录号:WOS:000710458700001)】；

基金：This work was supported by the National Natural Science Foundation of China (52073092, 52073094, and 51873061). Support by Shanghai Scientific and Technological Innovation Projects (19JC1411700, 18JC1410802, and 20ZR1415600) is also appreciated.

语种：英文

外文关键词：Irradiation - Chirality - Self assembly - Supramolecular chemistry - Micelles

摘要：Imposing chirality to supramolecular architectures is an important step forward toward understanding and utilization of chiral nanomaterials. This article reports the self-assembly of amphiphilic chiral alternating copolymers of poly(binaphthyl azobenzene-alt-hexaethylene glycol) (P(BNPAzo-alt-EG(6))) into helical supramolecular rods. Unlike conventional chiral assembly of copolymers largely through intermolecular organization, the intrachain stacking of chiral units along the main chain into single molecular micelles with amplified axial chirality of binaphthyl is key to the formation of helical supramolecular rods, which takes advantage of the particular chiral unit and soft unit alternating topological structure of the backbones. Moreover, the supramolecular self-assembly is light reversible because the azobenzene rings in the backbone scarcely execute trans- to cis-isomerization upon UV irradiation, and therefore the supramolecular rods keep their sublevel chirality even though the helical appearance was destroyed. This work paves an effective route to construct and regulate chiral supramolecular architectures and reveals an insight into natural and artificial chiral self-assembly.