4.6 Article

An amide groups functionalized Cd-MOF as multi-responsive luminescent sensor for detecting Fe3+, Cr2O72-and OTC in water media

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JOURNAL OF MOLECULAR STRUCTURE
卷 1291, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.molstruc.2023.136009

关键词

Cd-MOF; Amide functional sites; Luminescent sensor; Multi-responsive; Quenching mechanism

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Water pollution with toxic heavy metals or antibiotics poses a significant safety risk to human survival and health. Luminescent metal-organic frameworks (LMOFs) have been developed as efficient sensors for detecting these contaminants. A new 2D Cd-LMOF LCU-125 has been fabricated with rich amide active functional sites, serving as a multi-responsive luminescent sensor. LCU-125 can selectively and sensitively detect Fe3+, Cr2O72-, and OTC through a quenching effect in both water and HEPES biological buffer solution, with low detection limits for these substances.
Water pollution with toxic heavy metals or antibiotics poses significant safety risks to human survival and health. Luminescent metal-organic frameworks (LMOFs) as sensors can efficiently detect the above contaminants. Herein, a new 2D (two-dimensional) Cd-LMOF LCU-125 (LCU = Liaocheng University) has been fabricated by introducing rich amide active functional sites to serve as a multi-responsive luminescent sensor. As expected, LCU-125 can selective and sensitive sensing Fe3+, Cr2O72-and OTC (oxytetracycline) by quenching effect both in water and HEPES biological buffer solution. Notably, the detection limits (LODs) of Fe3+, Cr2O72-and OTC are as low as 0.0441/0.0084, 0.0849/1.38, and 1.46 & mu;M (OTC in HEPES buffer), respectively. Moreover, a weak interaction quenching mechanism is proposed based on multiple experimental evidences.

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