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Highly efficient fluorescent sensing behavior of phosphate by dual-emissive lanthanide MOF


The detection of phosphate (Pi) under physiological conditions is a very important issue in environmental and biological science. Herein, a unique fluorescent probe {[EuL(H2O)1.35(DMF)0.65]·1.9DMF}n (1) was prepared through the organic-inorganic hybridization between asymmetrical tricarboxylate ligands and Eu2O2 clusters under solvothermal condition. The as-prepared sample 1 exhibited excellent fluorescent properties and could be designed as a self-calibrating fluorescent probe for sensitively and selectively detecting Pi which served as an essential substance in aquatic ecosystems and biological systems. The different responses of the two emission peaks caused by the addition of Pi content resulted in a continuous fluorescence color change, which could be clearly observed by the naked eye under UV light lamp illumination at 302 nm. Typically, a good linearity existed between the ratio of dual fluorescence intensities and the Pi contents ranging from 0.1 μM to 15 μM with a low detection limit of 52 nM (S/N=3). It was noteworthy that the prepared self-calibrating fluorescent probe displayed a specific recognition towards Pi anions with satisfactory recovery ranging from 92.8% to 100.6% in water samples and biological fluids. Thus, we can envision that this work may open a new avenue for detection of many other bioactive ions in environmental and biological samples.

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Publication details

The article was received on 17 Apr 2018, accepted on 31 Jul 2018 and first published on 31 Jul 2018

Article type: Paper
DOI: 10.1039/C8DT01515E
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Highly efficient fluorescent sensing behavior of phosphate by dual-emissive lanthanide MOF

    Y. Cheng, H. Zhang, B. Yang, J. Wu, Y. Wang, B. Ding, J. Huo and Y. Li, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT01515E

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