@article{36c4ce7e921b4a15b6466f2e049321ec,
title = "Light-Driven Spiral Deformation of Supramolecular Helical Microfibers by Localized Photoisomerization",
abstract = "Stimuli-responsive mechanical deformations widely occur in biological systems but the design of biomimetic shape-changing materials, especially those based on noncovalent interactions, remains highly challenging. Here, hydrogen-bonded supramolecular microfibers are reported, which can perform light-driven spiral deformation by switching an intrinsic azobenzene unit without monomer dissociation. The key design feature rests on rationally spaced multiple hydrogen bonds, which inhibits the disassembly pathway upon irradiation, allowing partial photomechanical actuation of the azobenzene cores in the confined environment of the assemblies. The light-controlled deformation process of the supramolecular microfibers can be switched in a fully reversible manner. This combination of confinement-inhibited disassembly and photoswitching to induce assembly deformation and actuation along length scales supports a distinctive strategy to design supramolecular materials with photomechanical motion.",
keywords = "photoresponsive materials, photoswitches, soft matter, supramolecular polymers, supramolecular self-assembly",
author = "Yuanxin Deng and Qi Zhang and Ting Nie and Fan Xu and Romain Costil and Gong, \{Xue Qing\} and He Tian and Feringa, \{Ben L.\} and Qu, \{Da Hui\}",
note = "Funding Information: This work was supported by National Natural Science Foundation of China (Grants 22025503, 21790361, 21871084, and 21672060), Shanghai Municipal Science and Technology Major Project (Grant 2018SHZDZX03), the Fundamental Research Funds for the Central Universities, the Program of Introducing Talents of Discipline to Universities (Grant B16017), Program of Shanghai Academic/Technology Research Leader (Grant 19XD1421100), and the Shanghai Science and Technology Committee (Grant 17520750100). B.L.F. acknowledges the financial support of the Netherlands Ministry of Education, Culture and Science (Gravitation program 024.601035). Y.D. acknowledges the financial support of China Scholarship Council. This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sk{\l}odowska Curie grant agreement (Q.Z.: individual fellowship No. 101025041). The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for help on the material characterization. The authors also thank the Research Center of Analysis and Test of East China University of Science and Technology for help on the material characterization. Publisher Copyright: {\textcopyright} 2021 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH",
year = "2022",
month = jan,
day = "4",
doi = "10.1002/adom.202101267",
language = "English",
volume = "10",
journal = "Advanced optical materials",
issn = "2195-1071",
publisher = "WILEY-V C H VERLAG GMBH",
number = "1",
}