文献类型：期刊文献

英文题名：Branched Aggregates with Tunable Morphology via Hierarchical Self-Assembly of Azobenzene-Derived Molecular Double Brushes

作者：Xu, Binbin[1];Qian, Hongyu[1];Zhang, Ling[1];Lin, Shaoliang[1]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Mat & Dynam Chem, Shanghai Key Lab Adv Polymer Mat,Minist Educ, Key Lab Ultrafine Mat,Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：60

期号：32

起止页码：17707

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20212810617356);WOS:【SCI-EXPANDED(收录号:WOS:000668750400001)】；

基金：This work is supported by National Natural Science Foundation of China (Grant Nos. 52073092, 51873061, and 22001072). Support by Shanghai Scientific and Technological Innovation Projects (19JC1411700, 18JC1410802), Program of Shanghai Academic Research Leader (19XD1401400), "Chen Guang" Project (20CG38), and Sailing Program (19YF1410300) are also appreciated.

语种：英文

外文关键词：azo compounds; branched supermicelles; hierarchical assembly; molecular double brushes; photo-responsiveness

摘要：Hierarchical self-assembly is one of the most effective approaches to fabricate nature-inspired materials with subtle nanostructures. We report a distinct hierarchical self-assembly process of molecular double brushes (MDBs) with each graft site carrying a poly(azobenzene-acrylate) (PAzo) chain and a poly(ethylene oxide) (PEO) chain. Asymmetric tapered worm (ATW) nanostructures with chain-end reactivity assembling from the azobenzene-derived MDBs serve as primary subunits to prepare branched supermicelles by increasing water content (C-w) in THF/water. Various natural Antedon-shaped multiarm worm-like aggregates (MWAs) can be created via the particle-particle connection of ATWs. Intriguingly, the azobenzene moieties undergo trans-cis isomerization upon UV irradiation and further promote a morphology evolution of MWAs. Multiscale supermicelles comprised of starfish shapes with differing central body and arm morphologies (e.g., compare to the biological specimens Luidia ciliaris and Crossaster papposus) were prepared by manipulating irradiation time.