Embedding and Positioning of Two Fe^II ₄ L₄ Cages in Supramolecular Tripeptide Gels for Selective Chemical Segregation.

ABSTRACT: An unreported d,l-tripeptide self-assembled into gels that embedded Fe^II ₄ L₄ metal-organic cages to form materials that were characterized by TEM, EDX, Raman spectroscopy, rheometry, UV/Vis and NMR spectroscopy, and circular dichroism. The cage type and concentration modulated gel viscoelasticity, and thus the diffusion rate of molecular guests through the nanostructured matrix, as gauged by ¹⁹ F and ¹ H NMR spectroscopy. When two different cages were added to spatially separated gel layers, the gel-cage composite material enabled the spatial segregation of a mixture of guests that diffused into the gel. Each cage selectively encapsulated its preferred guest during diffusion. We thus present a new strategy for using nested supramolecu

SUBMITTER: Kieffer M 

PROVIDER: S-EPMC6563161 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature