2022
DOI: 10.3390/gels8100615
|View full text |Cite
|
Sign up to set email alerts
|

Photo-Crosslinked Coumarin-Containing Bis-Urea Amphiphile Hydrogels

Abstract: The design of photo-responsive supramolecular hydrogels based on coumarin dimerization and de-dimerization is described. The photo-responsive coumarin unit is chemically incorporated into an oligo(ethylene glycol) (OEG) bis-urea amphiphile that is capable of co-assembling with non-functionalized OEG amphiphile, to form supramolecular fibers. UV light with two different wavelengths (365 nm and 254 nm) is employed to induce a photo-reversible dimerization and de-dimerization process of coumarin units, respective… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1

Citation Types

0
2
0

Year Published

2022
2022
2025
2025

Publication Types

Select...
5

Relationship

0
5

Authors

Journals

citations
Cited by 6 publications
(2 citation statements)
references
References 30 publications
0
2
0
Order By: Relevance
“…For example, Liu et al developed coumarin-incorporated oligo ethylene glycol bis-urea amphiphile monomers that showed a sol-to-gel transition upon irradiation at 365 nm and the reaction was partially reversible at 254 nm. 59 Other examples of [2+2] cycloaddition includes cinnamates, [60][61][62][63] maleimides, [64][65][66] and stilbenes. 67,68 The [4+4] cycloaddition reaction is similar to [2+2]-cycloaddition, wherein exposure to 365 nm causes dimerization and exposure to short UV light (o280 nm) causes dissociation.…”
Section: Photo-responsive Hydrogelsmentioning
confidence: 99%
“…For example, Liu et al developed coumarin-incorporated oligo ethylene glycol bis-urea amphiphile monomers that showed a sol-to-gel transition upon irradiation at 365 nm and the reaction was partially reversible at 254 nm. 59 Other examples of [2+2] cycloaddition includes cinnamates, [60][61][62][63] maleimides, [64][65][66] and stilbenes. 67,68 The [4+4] cycloaddition reaction is similar to [2+2]-cycloaddition, wherein exposure to 365 nm causes dimerization and exposure to short UV light (o280 nm) causes dissociation.…”
Section: Photo-responsive Hydrogelsmentioning
confidence: 99%
“…For example, Okano et al fabricated cell sheets by culturing cells on a temperature-responsive poly(N-isopropylacrylamide) (PNIPAAm) surface, which became hydrophobic with increasing temperature around its lower critical solution temperature (LCST) [30][31][32]. Furthermore, multistimuliresponsive polymers with photoreactive groups have also been studied intensively [33][34][35][36][37][38]. For example, photocrosslinked and photodegradable hydrogels that can change their mechanical properties, such as stiffness, in response to light exposure have been used as stimuli-responsive scaffolds to control cell behavior [39][40][41][42][43][44][45].…”
Section: Introductionmentioning
confidence: 99%