One-pot synthesis of two novel Ce-MOFs for the detection of tetracyclic antibiotics and Fe3+

Yu, Hao; Zhou, Fengdi; Xie, Huihui; Yang, Xinyue; Qiu, Bin; Xu, Xiuling

doi:10.1016/j.molstruc.2024.138023

Cited by 7 publications

(1 citation statement)

References 26 publications

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“…As shown in Figure 5 d, the fluorescence lifetime of Ce-MOF was 24 ns, which changed to 16 ns after oxTMB was added. The change in the fluorescence lifetime indicated that the enhanced fluorescence between Ce-MOF and oxTMB was based on the shortened fluorescence lifetime of Ce-MOF as an energy donor by FRET [ 42 ]. In addition, with the increase in the concentration of Na 2 S, the oxTMB in the solution was reduced to TMB, the oxTMB decreased, and the fluorescence emission intensity of the detection system at 410 nm gradually increased, indicating that the FRET effect was enhanced [ 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

Dual-Mode Ce-MOF Nanozymes for Rapid and Selective Detection of Hydrogen Sulfide in Aquatic Products

Cheng,

Du,

et al. 2024

Polymers

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Increasing concern over the safety of consumable products, particularly aquatic products, due to freshness issues, has become a pressing issue. Therefore, ensuring the quality and safety of aquatic products is paramount. To address this, a dual-mode colorimetric–fluorescence sensor utilizing Ce-MOF as a mimic peroxidase to detect H2S was developed. Ce-MOF was prepared by a conventional solvothermal synthesis method. Ce-MOF catalyzed the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) by hydrogen peroxide (H2O2) to produce blue oxidized TMB (oxTMB). When dissolved, hydrogen sulfide (H2S) was present in the solution, and it inhibited the catalytic effect of Ce-MOF and caused the color of the solution to fade from blue to colorless. This change provided an intuitive indication for the detection of H2S. Through steady-state dynamic analysis, the working mechanism of this sensor was elucidated. The sensor exhibited pronounced color changes from blue to colorless, accompanied by a shift in fluorescence from none to light blue. Additionally, UV–vis absorption demonstrated a linear correlation with the H2S concentration, ranging from 200 to 2300 µM, with high sensitivity (limit of detection, LOD = 0.262 μM). Fluorescence intensity also showed a linear correlation, ranging from 16 to 320 µM, with high selectivity and sensitivity (LOD = 0.156 μM). These results underscore the sensor’s effectiveness in detecting H2S. Furthermore, the sensor enhanced the accuracy of H2S detection and fulfilled the requirements for assessing food freshness and safety.

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Section: Resultsmentioning

confidence: 99%