Multi‐Stimuli‐Responsive Polymeric Materials

Guragain, Sudhina; Bastakoti, Bishnu Prasad; Malgras, Victor; Nakashima, Kenichi; Yamauchi, Yusuke

doi:10.1002/chem.201501101

Cited by 197 publications

(120 citation statements)

References 119 publications

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“…The interest for stimuli‐responsive self‐assembled “soft” molecular materials has been steadily increasing over the past decade . This increasing attention can be easily explained by the large variety of applications currently envisioned for adaptive/self‐healable dynamic supramolecular assemblies in material science, catalysis, sensing and electronics.…”

Section: Introductionmentioning

confidence: 99%

Redox‐Induced Molecular Metamorphism Promoting a Sol/Gel Phase Transition in a Viologen‐Based Coordination Polymer

Kahlfuss

Gibaud

Denis‐Quanquin

et al. 2018

Chemistry A European J

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We have developed a strategy enabling control over the organization of ditopic molecular tectons within a palladium-based self-assembled system. The key electron-responsive sub-unit is a viologen-based mechanical hinge that can toggle under electric stimulation between a folded and a stretched position, the driving force of the folding motion being the π-dimerisation of the electrogenerated viologen cation radicals. The title ditopic tecton features two planar, N2-type, triazole/pyridine-based bidentate binding units, providing the tecton with the ability to chelate two palladium ions both in its folded and in its elongated conformations. Association of this ditopic redox-responsive tecton with palladium to form 1D self-assembled architectures undergoing large scale reorganizations in solution under electric stimulation, has been established on the ground of spectroscopic, electrochemical, spectro-electrochemical and rheological data. Our result reveal that addition of metal leads to a significant stabilization of the π-dimer species in solution and that the redox-triggered reorganisation of the tectons comes along in suitable conditions with a macroscopic sol/gel-type phase transition.

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Section: Introductionmentioning

confidence: 99%

Redox‐Induced Molecular Metamorphism Promoting a Sol/Gel Phase Transition in a Viologen‐Based Coordination Polymer

Kahlfuss

Gibaud

Denis‐Quanquin

et al. 2018

Chemistry A European J

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“…Although significantly progress has been made in the past decades, artificial stimuli responsive systems are far less sophisticated than natural polymers, that is, proteins that can respond to multi stimuli and changes assembly structures accordingly. Thus, multi‐responsive systems that respond to two or more stimuli have been investigated . For instance, Yang et al .…”

Section: Introductionmentioning

confidence: 99%

Preparation of quadruple responsive polymeric micelles combining temperature‐, pH‐, redox‐, and UV‐responsive behaviors and its application in controlled release system

Dong

Huo

et al. 2018

J of Applied Polymer Sci

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A novel series of quadruple responsive copolymers, poly(ethylene glycol)‐ss‐[poly(dimethylaminoethyl methacrylate)‐co‐poly(2‐nitrobenzyl methacrylate)] [PEG‐ss‐(PDMAEMA‐co‐PNBM)], were synthesized via atom transfer radical polymerization mediated by home‐made PEG‐based macro‐initiator labeled with disulfides. The obtained copolymers could self‐assemble in aqueous solution forming micelles with the disulfide bridge linking the hydrophilic coronas (PEG) and the hydrophobic cores (PDMAEMA‐co‐PNBM). Investigation on the resulted micelles indicated that the micelles could respond to various stimuli, that is, temperature, pH, the presence of dithiothreitol (DTT), and UV irradiation. Moreover, the responsive behavior of the micelles depends on the type of stimuli, that is, temperature change causes size change of the micelles, while UV irradiation leads to dissolution of the self‐assembled structures. Such stimulus‐dependent responsive behavior could be applied in smart materials that deal with multi‐tasks or in the construction of complex logic gate. The potential application of the multi‐responsive micelles in cargo release system was also evaluated using Nile Red (NR) as model molecule. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46675.

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“…This fact requires storage of PEG‐ketal‐DMA as a powder or at basic pH. We were particularly interested in the degradation in slightly acidic environment, as it is present inside of the endolysosome in a cell (as low as pH 4.5) or in inflammatory/cancerous tissue (about pH 6.5) …”

Section: Resultsmentioning

confidence: 99%

Poly(Ethylene Glycol) Dimethacrylates with Cleavable Ketal Sites: Precursors for Cleavable PEG‐Hydrogels

Pohlit

Leibig

Frey

2017

Macromolecular Bioscience

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The authors introduce poly(ethylene glycol) (PEG) based macromonomers containing acid‐labile ketal moieties as well as terminal methacrylate units that are amenable to radical polymerization. The synthesis of PEGs of different molecular weights (ranging from 2000 to 13 000 g mol−1 with polydispersities <1.15) with a central ketal unit (PEG‐ketal‐diol) and their conversion to PEG‐ketal‐dimethacrylates (PEG‐ketal‐DMA) is introduced. Degradation rates of both PEG‐ketal‐diols and PEG‐ketal‐DMA are investigated by in situ 1H NMR kinetic studies in deuterated phosphate buffer. Hydrogels containing 0, 5, or 10 wt% of PEG‐ketal‐DMA and 100, 95, or 90 wt% of PEG‐DMA, respectively, are synthesized and disintegration of the gels is investigated in buffer at different pH values. Visible disintegration of the gels appears at pH 5 for hydrogels containing PEG‐ketal‐DMA, whereas no visible degradation is observed at all at neutral pH or for PEG hydrogels without PEG‐ketal‐DMA.

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Multi‐Stimuli‐Responsive Polymeric Materials

Cited by 197 publications

References 119 publications

Redox‐Induced Molecular Metamorphism Promoting a Sol/Gel Phase Transition in a Viologen‐Based Coordination Polymer

Redox‐Induced Molecular Metamorphism Promoting a Sol/Gel Phase Transition in a Viologen‐Based Coordination Polymer

Preparation of quadruple responsive polymeric micelles combining temperature‐, pH‐, redox‐, and UV‐responsive behaviors and its application in controlled release system

Poly(Ethylene Glycol) Dimethacrylates with Cleavable Ketal Sites: Precursors for Cleavable PEG‐Hydrogels

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