Journal
CHEMICAL SCIENCE
Volume 11, Issue 36, Pages 9919-9924Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0sc03457f
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Funding
- Henkel AG Co.
- KGaA
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Catechol and amine residues, both abundantly present in mussel adhesion proteins, are known to act cooperatively by displacing hydration barriers before binding to mineral surfaces. In spite of synthetic efforts toward mussel-inspired adhesives, the effect of positioning of the involved functional groups along a polymer chain is not well understood. By using sequence-defined oligomers grafted to soft hydrogel particles as adhesion probes, we study the effect of catechol-amine spacing, as well as positioning relative to the oligomer terminus. We demonstrate that the catechol-amine spacing has a significant effect on adhesion, while shifting their position has a small effect. Notably, combinations of non-charged amides and catechols can achieve similar cooperative effects on adhesion when compared to amine and catechol residues. Thus, these findings provide a blueprint for the design of next generation mussel-inspired adhesives.
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