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Light‐Responsive Arylazopyrazole Gelators: From Organic to Aqueous Media and from Supramolecular to Dynamic Covalent Chemistry
- Source :
- Chemistry (Weinheim an Der Bergstrasse, Germany)
- Publication Year :
- 2019
- Publisher :
- Wiley, 2019.
-
Abstract
- Versatile photoresponsive gels based on tripodal low molecular weight gelators (LMWGs) are reported. A cyclohexane‐1,3,5‐tricarboxamide (CTA) core provides face‐to‐face hydrogen bonding and a planar conformation, inducing the self‐assembly of supramolecular polymers. The CTA core was substituted with three arylazopyrazole (AAP) arms. AAP is a molecular photoswitch that isomerizes reversibly under alternating UV and green light irradiation. The E isomer of AAP is planar, favoring the self‐assembly, whereas the Z isomer has a twisted structure, leading to a disassembly of the supramolecular polymers. By using tailor‐made molecular design of the tripodal gelator, light‐responsive organogels and hydrogels were obtained. Additionally, in the case of the hydrogels, AAP was coupled to the core through hydrazones, so that the hydrogelator and, hence, the photoresponsive hydrogel could also be assembled and disassembled by using dynamic covalent chemistry.
- Subjects :
- Supramolecular chemistry
010402 general chemistry
01 natural sciences
Catalysis
light-responsive materials
Light responsive
Polymer chemistry
supramolecular polymers
chemistry.chemical_classification
Full Paper
Aqueous medium
Photoswitch
010405 organic chemistry
Hydrogen bond
Organic Chemistry
Light‐Responsive Materials | Very Important Paper
Dynamic covalent chemistry
General Chemistry
Full Papers
gels
0104 chemical sciences
Supramolecular polymers
chemistry
arylazopyrazole
Self-healing hydrogels
dynamic covalent chemistry
Subjects
Details
- ISSN :
- 15213765 and 09476539
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Chemistry – A European Journal
- Accession number :
- edsair.doi.dedup.....ef09c2a483d0e04eeff2efcdc38d411a