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A water-stable terbium metal–organic framework with functionalized ligands for the detection of Fe3+ and Cr2O72− ions in water and picric acid in seawater

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Abstract

The existence of Cr2O72− anions and excessive Fe3+ cations in water and picric acid in seawater causes irreversible harm to human health and aquatic organisms. Herein, a water-stable terbium metal–organic framework (namely Tb-MOF-A) was fabricated from 1,10-phenanthroline (phen) and 2,3,5,6-tetrafluoroterephthalic acid (H2tftba) under hydrothermal conditions. Due to the features of the pyridine- and fluorine-functionalized organic ligands and Tb3+ ions, Tb-MOF-A can quickly, quantitatively and circularly detect Cr2O72− anions and Fe3+ cations in a water environment and picric acid in a simulated seawater environment. In addition, the stability studies exhibit excellent water stability and fluorescent stability for 21 days, thermal stability and fluorescent stability in water (−18 °C to 50 °C), and acid-basic solution stability and fluorescent stability (pH = 2–11) for 4 days. Novel Tb-MOF-A is expected to be applied in practical water environment engineering as an excellent sensor with high water-stability, sensitivity, and reusability.

Graphical abstract: A water-stable terbium metal–organic framework with functionalized ligands for the detection of Fe3+ and Cr2O72− ions in water and picric acid in seawater

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Article information


Submitted
21 Mar 2020
Accepted
27 Apr 2020
First published
28 Apr 2020

CrystEngComm, 2020, Advance Article
Article type
Paper

A water-stable terbium metal–organic framework with functionalized ligands for the detection of Fe3+ and Cr2O72− ions in water and picric acid in seawater

H. Yu, J. Chi, Z. Su, X. Li, J. Sun, C. Zhou, X. Hu and Q. Liu, CrystEngComm, 2020, Advance Article , DOI: 10.1039/D0CE00430H

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