Xylenol orange-modified CdTe quantum dots as a fluorescent/colorimetric dual-modal probe for anthrax biomarker based on competitive coordination

Eu3+-MOF fluorescence sensor based on a dual-ligand strategy for visualised detection of an anthrax biomarker 2,6-pyridine dicarboxylic acid

“…The pathogens can germinate and grow even under extreme conditions accompanied by the release of 2,6-dipicolinic acid (DPA). 4,5 DPA is an important component and a major biomarker for bacillus anthrax spores, which accounts for 5–15% of their dry weight. 6–8 Therefore, accurate measurement of DPA is of the utmost importance to prevent anthrax infection and protect public health.…”

Dual-mode detection of 2,6-pyridinedicarboxylic acid based on the enhanced peroxidase-like activity and fluorescence property of novel Eu-MOFs

“…However, fluorescence methods mainly depend on the sensitization property of DPA, and other properties of DPA are yet to be exploited. Additionally, dual-mode probes based on colorimetry and fluorescent methods have been developed, 12–14 which exhibit better flexibility in ensuring accuracy and reliability of detection results by mutual validation. However, colorimetric methods mainly depend on the competitive chelation of indicators and DPA by metal ions, and the colorimetric results are influenced by the pH of solutions, which limits the development of chelation-based colorimetric methods.…”