New Strategy Based on Click Reaction for Preparation of 3-Acyl-4-hydroxycoumarin-Modified Silica as a Perspective Material for the Separation of Rare Earth Elements.

ABSTRACT: The separation of rare earth elements (REEs) with similar chemical properties remains a relevant challenge today, most often addressed using liquid-liquid and solid-phase extraction with various chelating agents. Excellent complexing agents for REEs are 1,3-diketones and their analogs. We have for the first time proposed a method for preparing a material consisting of a covalently immobilized 3-acyl-4-hydroxycoumarin ligand on silica. For its synthesis, we employed a strategy based on the "click" reaction of 3-azidopropyl silica with a propargyl-containing coumarin-chalcone conjugate-this approach is the most tolerant and does not affect the coordinationally active fragment of the ligand. The material was characterized by thermal analysis, IR spectroscopy, and ¹³C NMR. The poten

SUBMITTER: Konshina DN 

PROVIDER: S-EPMC12844081 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature