Modulator Control of Cation Distribution in Mixed-Metal UiO-66(Zr,Ce) Metal-Organic Frameworks.

ABSTRACT: The cation distribution and redox activity of the [(Ce _x Zr_6‑x)-(OH)₄O₄]¹²⁺ clusters in bimetallic UiO-66-(Ce/Zr) MOFs were modified by varying the choice of modulator during synthesis. Extended X-ray absorption spectroscopy (EXAFS) at the Ce and Zr K-edges, in situ Fourier-transform infrared (FTIR) spectroscopy, along with density functional theory (DFT) calculations reveal that using benzoic acid as a modulator leads to the preferential formation of the [(cis-Ce₂Zr₄)-(OH)₄O₄]¹²⁺ cluster in UiO-66 (Ce/Zr) with higher Ce incorporation (33% Ce) than formic acid-modulated synthesis, which predominantly contains a [(CeZr₅)-(OH)₄O₄]

SUBMITTER: Zhao B 

PROVIDER: S-EPMC12746409 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature