Self-healing hydrogels by metal complexation of 2,6-bis(1,2,3-triazol-4yl)pyridine functionalized tetra-arm star poly(ethylene glycol)
- Author
- Xiaowen Xu, Valentin-Victor Jerca (UGent) and Richard Hoogenboom (UGent)
- Organization
- Abstract
- The fabrication of 2,6-bis(1,2,3-triazol-4yl)pyridine (btp) based metallo-supramolecular gels has been mainly focusing on organogels. Only recently, the synthesis and metallo-supramolecular hydrogel formation of linear poly(ethylene glycol) (PEG) with multiple btp units in the main chain are reported. In this manuscript, metallo-supramolecular hydrogels that are constructed using tetra-arm star PEG-modified with btp end-groups upon complexation with transition metal ions are reported. This btp-functionalized star-PEG precursor is more easily accessible and more defined than the previously reported linear system while also yielding stronger hydrogels. The gelation is selectively induced by Ni2+ ions and strongly depended on the metal-ligand ratio and polymer concentration. The successful formation of organogels can be induced selectively by Ni2+ or Fe2+ ion complexation in acetonitrile, which leads to the strongest complexes. The inability to form hydrogels with Fe2+ ions is ascribed to the partial oxidation of Fe2+ to Fe3+ ions in an aqueous solution. Furthermore, the optimal conditions for achieving self-healing capabilities are also determined (i.e., 4 wt% polymer concentration and btp:Ni2+ molar ratio of 2:1) using rheology. The high strain resistance and fast self-healing characteristics make these specific Ni2+ metallo-supramolecular hydrogels a promising platform for materials design with potential applications in supramolecular chemistry, coordination chemistry, and catalysis.
- Keywords
- click chemistry, hydrogels, metal-ligand coordination, polymers, GELS, PEG, RELAXATION
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01GVZK2EBGK9GZ8X595VM8HFC3
- MLA
- Xu, Xiaowen, et al. “Self-Healing Hydrogels by Metal Complexation of 2,6-Bis(1,2,3-Triazol-4yl)Pyridine Functionalized Tetra-Arm Star Poly(Ethylene Glycol).” MACROMOLECULAR CHEMISTRY AND PHYSICS, vol. 224, no. 3, WILEY-V C H Verlag GMBH, 2023, doi:10.1002/macp.202200330.
- APA
- Xu, X., Jerca, V.-V., & Hoogenboom, R. (2023). Self-healing hydrogels by metal complexation of 2,6-bis(1,2,3-triazol-4yl)pyridine functionalized tetra-arm star poly(ethylene glycol). MACROMOLECULAR CHEMISTRY AND PHYSICS, 224(3). https://doi.org/10.1002/macp.202200330
- Chicago author-date
- Xu, Xiaowen, Valentin-Victor Jerca, and Richard Hoogenboom. 2023. “Self-Healing Hydrogels by Metal Complexation of 2,6-Bis(1,2,3-Triazol-4yl)Pyridine Functionalized Tetra-Arm Star Poly(Ethylene Glycol).” MACROMOLECULAR CHEMISTRY AND PHYSICS 224 (3). https://doi.org/10.1002/macp.202200330.
- Chicago author-date (all authors)
- Xu, Xiaowen, Valentin-Victor Jerca, and Richard Hoogenboom. 2023. “Self-Healing Hydrogels by Metal Complexation of 2,6-Bis(1,2,3-Triazol-4yl)Pyridine Functionalized Tetra-Arm Star Poly(Ethylene Glycol).” MACROMOLECULAR CHEMISTRY AND PHYSICS 224 (3). doi:10.1002/macp.202200330.
- Vancouver
- 1.Xu X, Jerca V-V, Hoogenboom R. Self-healing hydrogels by metal complexation of 2,6-bis(1,2,3-triazol-4yl)pyridine functionalized tetra-arm star poly(ethylene glycol). MACROMOLECULAR CHEMISTRY AND PHYSICS. 2023;224(3).
- IEEE
- [1]X. Xu, V.-V. Jerca, and R. Hoogenboom, “Self-healing hydrogels by metal complexation of 2,6-bis(1,2,3-triazol-4yl)pyridine functionalized tetra-arm star poly(ethylene glycol),” MACROMOLECULAR CHEMISTRY AND PHYSICS, vol. 224, no. 3, 2023.
@article{01GVZK2EBGK9GZ8X595VM8HFC3,
abstract = {{The fabrication of 2,6-bis(1,2,3-triazol-4yl)pyridine (btp) based metallo-supramolecular gels has been mainly focusing on organogels. Only recently, the synthesis and metallo-supramolecular hydrogel formation of linear poly(ethylene glycol) (PEG) with multiple btp units in the main chain are reported. In this manuscript, metallo-supramolecular hydrogels that are constructed using tetra-arm star PEG-modified with btp end-groups upon complexation with transition metal ions are reported. This btp-functionalized star-PEG precursor is more easily accessible and more defined than the previously reported linear system while also yielding stronger hydrogels. The gelation is selectively induced by Ni2+ ions and strongly depended on the metal-ligand ratio and polymer concentration. The successful formation of organogels can be induced selectively by Ni2+ or Fe2+ ion complexation in acetonitrile, which leads to the strongest complexes. The inability to form hydrogels with Fe2+ ions is ascribed to the partial oxidation of Fe2+ to Fe3+ ions in an aqueous solution. Furthermore, the optimal conditions for achieving self-healing capabilities are also determined (i.e., 4 wt% polymer concentration and btp:Ni2+ molar ratio of 2:1) using rheology. The high strain resistance and fast self-healing characteristics make these specific Ni2+ metallo-supramolecular hydrogels a promising platform for materials design with potential applications in supramolecular chemistry, coordination chemistry, and catalysis.}},
articleno = {{2200330}},
author = {{Xu, Xiaowen and Jerca, Valentin-Victor and Hoogenboom, Richard}},
issn = {{1022-1352}},
journal = {{MACROMOLECULAR CHEMISTRY AND PHYSICS}},
keywords = {{click chemistry,hydrogels,metal-ligand coordination,polymers,GELS,PEG,RELAXATION}},
language = {{eng}},
number = {{3}},
pages = {{7}},
publisher = {{WILEY-V C H Verlag GMBH}},
title = {{Self-healing hydrogels by metal complexation of 2,6-bis(1,2,3-triazol-4yl)pyridine functionalized tetra-arm star poly(ethylene glycol)}},
url = {{http://doi.org/10.1002/macp.202200330}},
volume = {{224}},
year = {{2023}},
}
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