Ratiometric photoluminescent sensing of 2,6-pyridinedicarboxylic acid using bimetallic metal-organic framework nanorods.

ABSTRACT: Lanthanide-based metal-organic frameworks (MOFs) are promising probes for photoluminescent sensing of various chemical substances. In this study, we report the ultrasonication-assisted synthesis of bimetallic Eu/Tb-MOF nanorods for the highly sensitive detection of 2,6-pyridinedicarboxylic acid (DPA), a major biomarker for Bacillus anthracis. The prepared Eu/Tb-MOF nanorods exhibited a robust framework structure, uniform morphology, and strong photoluminescent emissions thanks to the synergy between Eu³⁺ and Tb³⁺ ions. The photoluminescent quenching effect is clearly observed upon the addition of DPA to these Eu/Tb-MOF aqueous suspensions, and has been utilized for sensing DPA. We achieved an impressive detection limit of 60 nM using the Eu_0.1Tb

SUBMITTER: Doan VN 

PROVIDER: S-EPMC12509207 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature