Metal-ligand interactions have emerged as an important tool to trigger and modulate self-assembly, and to tune the properties of the final supramolecular materials. Herein, we report the metal-cation induced self-assembly of a pyrene-peptide conjugate to form hydrogels. The peptide has been rationally designed to favor the formation of β-sheet 1D assemblies and metal coordination through the Glu side chains. We studied in detail the self-assembly process in the presence of H, Li, Na, K, Ca, Ni, Cu, Zn, Cd, Co, Fe, and Cr and found that the morphology and mechanical properties of the hydrogels are ion-dependent. Moreover, thanks to the presence of the metal, new applications could be explored. Cu metallogels could be used for amine sensing and meat freshness monitoring, while Zn metallogels showed good selectivity for cationic dye adsorption and separation.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8293139 | PMC |
| http://dx.doi.org/10.3390/gels7030085 | DOI Listing |
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