Lanthanide binding peptide surfactants at air-aqueous interfaces for interfacial separation of rare earth elements.

ABSTRACT: Rare earth elements (REEs) are critical materials to modern technologies. They are obtained by selective separation from mining feedstocks consisting of mixtures of their trivalent cation. We are developing an all-aqueous, bioinspired, interfacial separation using peptides as amphiphilic molecular extractants. Lanthanide binding tags (LBTs) are amphiphilic peptide sequences based on the EF-hand metal binding loops of calcium-binding proteins which complex selectively REEs. We study LBTs optimized for coordination to Tb³⁺ using luminescence spectroscopy, surface tensiometry, X-ray reflectivity, and X-ray fluorescence near total reflection, and find that these LBTs capture Tb³⁺ in bulk and adsorb the complex to the interface. Molecular dynamics show that the binding poc

SUBMITTER: Ortuno Macias LE 

PROVIDER: S-EPMC11670062 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature