Ultrastable 1D Europium Complex for Simultaneous and Quantitative Sensing of Cr(III) and Cr(VI) Ions in Aqueous Solution with High Selectivity and Sensitivity.

Author(s) Liu, J.; Ji, G.; Xiao, J.; Liu, Z.
Journal Inorg Chem
Date Published 2017 Apr 03
Abstract

A unique metal-organic complex (MOC) with formula [Eu2(tpbpc)4·CO3·4H2O]·DMF·solvent (Htpbpc = 4'-[4,2';6',4″]-terpyridin-4'-yl-biphenyl-4-carboxylic acid) has been successfully constructed under solvothermal conditions. The Eu complex, as proved by structural analysis, exhibits a fascinating 1D linear-type chain structure which is further extended to a 3D H-bonded supramolecular framework. The luminescent investigations confirm that the emission behavior of the Eu complex possesses excellent water stability and pH stability, and it is the first example of a MOC-based fluorescent probe with high selectivity, high sensitivity, and low detection limit, targeting Cr(III) and Cr(VI) (CrO4(2-)/Cr2O7(2-)) ions in aqueous solution. Importantly, the luminescence can be fast and simple, regenerated in detecting CrO4(2-) and Cr2O7(2-) ions. Furthermore, the simple fluorescent-based test paper was successfully prepared and provided a reliable and visual detection of Cr(3+), CrO4(2-), and Cr2O7(2-) ions in daily applications.

DOI 10.1021/acs.inorgchem.7b00157
ISSN 1520-510X
Citation Liu J, Ji G, Xiao J, Liu Z. Ultrastable 1D Europium Complex for Simultaneous and Quantitative Sensing of Cr(III) and Cr(VI) Ions in Aqueous Solution with High Selectivity and Sensitivity. Inorg Chem. 2017;56(7):4197-4205.

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