文献类型：期刊文献

英文题名：Helical supramolecular nanorods via sequential meticulous tailoring of noncovalent interaction and light irradiation

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, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：65

期号：9

起止页码：1749

外文期刊名：SCIENCE CHINA-CHEMISTRY

收录：;EI(收录号：20223512630320);WOS:【SCI-EXPANDED(收录号:WOS:000843253000001)】；

基金：This work was supported by the National Natural Science Foundation of China (52073092, 52073094, 51873061), Shanghai Scientific and Technological Innovation Project (19JC1411700, 20ZR1415600), "Chenguang Program" (18CG32) of Shanghai Education Development Foundation, and Shanghai Municipal Education Commission.

语种：英文

外文关键词：alternating polymer; conformational organization assembly; chirality transmission; light response; azobenzene

摘要：Polymers are widely recognized to entail random conformations in good solvent governed by the need for achieving the highest entropy to reach thermodynamic equilibrium. In this context, it remains grand challenging to directly arrange them into ordered conformation as building blocks for further self-assembling into hierarchal structures. Herein, we report a simple yet viable strategy to progressively assemble rationally designed azobenzene-containing alternating copolymer (i.e., poly(binaphthyl-spacer-azobenzene-alt-hexaethylene glycol), denoted P(BNPSAzo-alt-EG(6))(24)) into helical supramolecular nanorods. Specifically, P(BNPSAzo-alt-EG(6))(24) chains in good solvent are firstly self-assembled into helical single molecular micelles in good solvent via intramolecular pi-pi interaction between binaphthyl groups as well as between azobenzene moieties. Subsequently, by simply introducing water into the solution that is allowed to dwell for a certain period of time, single molecular micelles are self-assembled into well-defined vesicles. Finally, these isotropic vesicles could be further transformed into anisotropic helical supramolecular nanorods with enhanced aggregate-induced emission (AIE) capability driven by repeated, light-triggered cis-trans isomerization of azobenzene moieties with the retention of pi-pi interacted binaphthyl groups. This study highlights a facile route to yielding morphology-rich, functional assemblies from a single polymer via judiciously exploiting non-covalent interaction and light of different wavelength as highly effective trigger in a non-invasive manner for potential applications in controlled release and fluorescent labelling.