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The improper use of organic explosives and antibiotics have brought serious threats to the public health and the environmental safety, exploiting cost-effective and handy luminescent sensors with water stability and high selectivity in monitoring and detecting these hazardous substances are of utmost importance. Herein, we developed a simple yet powerful luminescent test strip sensor in a facile way. As for fabricating this test strip, the filter paper used for filtering lanthanide MOF (Ln-MOF) of [Tb(HIP)(H2O)5]·(H2O)·(HIP)1/2 (Tb-HIP, where HIP is 5-hydroxyisophthalate) powders was firstly recycled, and encapsulated with poly(methyl methacrylate) (PMMA) polymer net. The as-fabricated Tb-HIP test strips exhibit enhanced mechanical stability than the un-encapsulated ones, and show characteristic green emission of Tb3+. These test strips can behave as promising highly selective luminescent probes for picric acid (PA) and macrodantin (MDT) even existence of relevant potentially competing analytes. The detection limit for PA is 0.26 μM, and for MDT is 0.21 μM. In addition, the sensors can be successfully applied to detect PA in the river water samples as well as MDT in serum samples with satisfactory results. More importantly, the Tb-HIP test strips are highly efficient, recyclable luminescence sensors to detect PA and MDT. Copyright © 2019 Elsevier B.V. All rights reserved.


Feng Zhang, Jinjin Ma, Shanshan Huang, Yaoyao Li. A mechanical stability enhanced luminescence lanthanide MOF test strip encapsulated with polymer net for detecting picric acid and macrodantin. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 2020 Mar 05;228:117816

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PMID: 31771909

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