A europium MOF-based turn-off fluorescent sensor for Cr2O72−, L-tryptophan, Dimethylnidazole detection in water

Sun, Na; Si, Xiuwen; Zhou, Xue; Yu, Han; He, Liuting; Liu, Xiaoting; Sun, Yaguang

doi:10.1016/j.poly.2024.116952

Cited by 4 publications

(1 citation statement)

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“…Metal–organic frameworks (MOFs) are a kind of rapidly emerging porous materials self-assembled by metal ions or metal clusters and organic linkers through coordination interactions equipped with numerous fascinating virtues, such as porosity, structural diversity, and modifiability. − On the other hand, rare-earth ions, such as Sm 3+ , Nd 3+ , Er 3+ , and especially Eu 3+ and Tb 3+ , feature the characteristic fluorescent emission, millisecond-class fluorescent lifetime, high quantum yield, etc. − Integrating the advantages of MOFs and rare-earth ions, metal–organic frameworks fabricated with rare-earth ions (Ln-MOFs) have attracted a large amounts of attention toward their potential application in chemical sensors for various ions, − diverse antibiotics, − amino acids, − and different biomarkers. − …”

Section: Introductionmentioning

confidence: 99%

Exploration of the Capacity of a Superstable Eu-MOF for Visualized Identification of 1-HP and Trp in Fresh Human Urine

Liu,

Xu,

Zhang

et al. 2024

Crystal Growth & Design

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1-Hydroxypyrene (1-HP) is known as the end product of polycyclic aromatic hydrocarbons (PAHs). Monitoring the content of 1-hydroxypyrene in human urine or serum can help measure the degree of polycyclic aromatic hydrocarbon poisoning in the human body. Tryptophan (Trp), one of the eight essential amino acids, plays a vital role in human growth and development. Therefore, exploration of a promising sensor for instant and accurate recognition of 1-HP and Trp has a profound influence on human health. Herein, a threedimensional (3D) europium-centered metal−organic framework ([Eu-(H 2 O) 5 ] 0.33 [Eu(obdb)]•2DMF, Eu-MOF) with amazing air stability, acid−base stability, and thermal stability was constructed through the coordination interaction between Eu(III) ions and a V-typed semirigid ligand with two isophthalate groups (H 4 obdb, 4′,4‴-oxybis([1,1′biphenyl]-3,5-dicarboxylic acid)) under a solvothermal condition. As expected, Eu-MOF can recognize 1-HP and Trp in binary solutions of DMF-H 2 O based on a significantly luminescent turn-off effect with high quenching efficiencies (99.2% for 1-HP and 93.8% for Trp), charming quenching constants (2.15 × 10 4 M −1 for 1-HP and 4.88 × 10 4 M −1 for Trp), low limit of detection (1.10 μM for 1-HP and 0.73 μM for Trp), and satisfactory antijamming capability. In addition, for detection of 1-HP or Trp, the color change of Eu-MOF from red to blue is visible to the naked eye as the concentration of 1-HP or Trp increases under a 365 nm UV lamp. Moreover, except in DMF-H 2 O solutions, the sensing capacities of Eu-MOF toward 1-HP and Trp are proven to be comparable in HEPES buffer solution and real samples.

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