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A luminescent lanthanide MOF for selectively and ultra-high sensitively detecting Pb2+ ion in aqueous solution

Abstract

A luminescent lanthanide metal−organic framework [Tb(L)(H2O)5]n•solvents (Tb−MOF, H2L− = 3, 5-dicarboxy-phenol anion ligand) with 2D network structure was synthesized. The size of Tb−MOF single crystal can reach to 6 mm; such a large-scale single crystals of MOFs was rarely reported in literatures. Tb−MOF exhibits a strong green luminescence induced by the efficient antenna effect of the ligands. Importantly, it shows an excellent recognition ability on detecting Pb2+ ion which is a noxious inorganic pollutant and cause permanent damage to human health and living environments. The perfect linear correlation between the luminescence intensity of Tb-MOF and the concentration of the Pb2+ ions provides this crystal as a reliable and easy-to-use luminescent sensor, which can be applied in pollutant monitoring. As far as we know, it is the first example of high-efficiency luminescent MOF sensor with millimeter level for detecting Pb2+ ion at a very low concentration with detection limit to 10−7 M.

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Publication details

The article was received on 20 Mar 2017, accepted on 19 Apr 2017 and first published on 19 Apr 2017


Article type: Paper
DOI: 10.1039/C7TA02439H
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    A luminescent lanthanide MOF for selectively and ultra-high sensitively detecting Pb2+ ion in aqueous solution

    G. Ji, J. Liu, X. Gao, W. Sun, J. Wang, S. Zhao and Z. Liu, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA02439H

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