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

Abstract

A dual-ligand ratiometric fluorescence sensor based on lanthanide–metal–organic frameworks was successfully synthesised for the sensitive and convenient detection of DPA.

A dual‐responsive luminescent sensor for efficient detection of 3‐nitrotyrosine and dipicolinic acid biomarkers based on copper(II) organic framework

“…Additionally, the intrinsic relationship between the DPA concentrations and the luminescence intensities of CuMOF suspensions was investigated. As shown in Figure 7c, it is evident that within the low concentration ranges, there exist favorable linear correlations aligning closely with the equation of I / I 0 = 18,770[DPA] + 1.1254 ( K sv = 1.87 × 10 4 M −1 , R 2 = 0.9675, LOD = 85.2 ng/ml), higher than other reported ones 53–57 (Table 3). Meanwhile, the response time was also conducted, and the results are shown in Figure S12, indicating the luminescence intensity of CuMOF suspensions can be maintained stable after 30 s. Furthermore, the CuMOF exhibits notable anti‐interference capabilities when detecting the DPA biomarker amidst the presence of other interfering analytes (Figure S13).…”

A Benzothiadiazole-Based Zn(II) Metal–Organic Framework with Visual Turn-On Sensing for Anthrax Biomarker and Theoretical Calculation

“…The relationship between the emission intensities of MOF-1 and the DPA concentration is illustrated in Figure 5c It is worth noting that a few examples of MOF-based luminescent chemical sensors for sensing DPA have been reported. To compare with the reported MOFs, the classic sensors are listed in Table S2 [45][46][47]. Considering the significant complexity of the samples detected in practical applications, the anti-interference sensing ability of MOF-1 was determined through competitive experiments.…”

MXene quantum dots for ratiometric fluorescence detection of a Bacillus anthracis biomarker

“…16,17 Particularly, the ratiometric fluorescence method of a probe was combined with Eu 3+ for DPA detection. 1,18 Additionally, intense red fluorescence of Eu 3+ can be activated through the coordination of DPA to Eu 3+ . Coupling with blue or green fluorescent probes, an obvious color variation can be observed by the naked eye.…”