Unprecedented Selectivity for Arsenic(III) in a Dimercaptosuccinic Acid-Based Zr-MOF: The Role of Dangling Ligands.

ABSTRACT: While zirconium-metal-organic frameworks (Zr-MOFs) show promise for arsenic remediation, their practical implementation faces critical challenges: poor capture of neutral arsenite (H₃AsO₃ containing As(III)) and limited selectivity for arsenate (HAsO₄ ^{2 -} and H₂AsO₄ ^- containing As(V)) species in the presence of competing ions. Here, we present a transformative solution using dimercaptosuccinic acid (DMSA) ligands to construct two topologically distinct Zr-MOFs. The Zr-DMSA framework with fcu topology demonstrates exceptional capture of both arsenic species, even in the presence of phosphates, which normally compete for adsorption sites. Through comprehensive structural analysis combining PDF analysis,

SUBMITTER: Felder TMO 

PROVIDER: S-EPMC12643329 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature