bei Google ScholarTitelangaben
Ziegler, Katharina ; Schlichter, Lisa ; Post, Yorick ; Gröschel, André H. ; Ravoo, Bart Jan:
Photoresponsive Block Copolymer Nanostructures through Implementation of Arylazopyrazoles.
In: ACS Macro Letters.
Bd. 13
(2024)
Heft 8
.
- S. 1065-1071.
ISSN 2161-1653
DOI: https://doi.org/10.1021/acsmacrolett.4c00345
Abstract
Responsive nanomaterials that can undergo reversible changes in morphology are interesting for the development of functional materials that interact with and respond to their environment. Amphiphilic block copolymers are well-known for their ability to create a wide range of supramolecular nanostructures in solution. Arylazopyrazoles (AAPs) are versatile molecular photoswitches, which change their configuration and hydrophobicity upon irradiation with UV light (365 nm, Z isomer, less hydrophobic) and green light (520 nm, E isomer, more hydrophobic). In this work, photoswitchable block copolymers containing arylazopyrazole tetraethylene glycol methacrylate (AAPMA) and oligo(ethylene glycol) methacrylate (OEGMA) forming amphiphilic POEGMA-b-PAAPMA with varying block lengths are prepared by RAFT polymerization. The photochemical properties of AAP persist in the polymers. Due to their amphiphilic structure, the polymers self-assemble into supramolecular morphologies in water. Remarkably, photoisomerization results in a reversible change in the self-assembly behavior. Specifically, spherical and cylindrical micelles are observed for POEGMA33-b-PAAPMA47 when illuminated with green or UV light during assembly. Furthermore, the morphology of assembled structures can be reversibly switched by subsequent irradiation with UV and green light.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Polymermaterialien für elektrochemische Speicher > Lehrstuhl Polymermaterialien für elektrochemische Speicher - Univ.-Prof. Dr. André Gröschel Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayerisches Zentrum für Batterietechnik - BayBatt |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 30 Sep 2024 08:28 |
| Letzte Änderung: | 30 Sep 2024 08:28 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/90488 |