A lanthanide metal organic frameworks ratiometric fluorescence sensor for visual detection of anthrax biomarker.

A novel dual-emission fluorescence probe, Eu-TDA-DHTP, was developed based on a ratiometric fluorescence-organic frameworks utilizing Eu, 2,5-Thiophenedicarboxylic acid, and 2,5-dihydroxyterephthalic acid for the ratiometric and fluorescent visual sensing of the anthrax biomarker 2,6-pyridine dicarboxylic acid (DPA). The experiments demonstrated that this material can effectively enhance dual emission for DPA detection, enabling clear visualization. The limit of detection for DPA detection using Eu-TDA-DHTP is 1.