A switchable sensor and scavenger: detection and removal of fluorinated chemical species by a luminescent metal–organic framework

Abstract

Fluorosis has been regarded as a worldwide disease that seriously diminishes the quality of life through skeletal embrittlement and hepatic damage. Effective detection and removal of fluorinated chemical species such as fluoride ions (F) and perfluorooctanoic acid (PFOA) from drinking water are of great importance for the sake of human health. Aiming to develop water-stable, highly selective and sensitive fluorine sensors, we have designed a new luminescent MOF In(tcpp) using a chromophore ligand 2,3,5,6-tetrakis(4-carboxyphenyl)pyrazine (H4tcpp). In(tcpp) exhibits high sensitivity and selectivity for turn-on detection of F and turn-off detection of PFOA with a detection limit of 1.3 μg L−1 and 19 μg L−1, respectively. In(tcpp) also shows high recyclability and can be reused multiple times for F detection. The mechanisms of interaction between In(tcpp) and the analytes are investigated by several experiments and DFT calculations. These studies reveal insightful information concerning the nature of F and PFOA binding within the MOF structure. In addition, In(tcpp) also acts as an efficient adsorbent for the removal of F (36.7 mg g−1) and PFOA (980.0 mg g−1). It is the first material that is not only capable of switchable sensing of F and PFOA but also competent for removing the pollutants via different functional groups.

Graphical abstract: A switchable sensor and scavenger: detection and removal of fluorinated chemical species by a luminescent metal–organic framework

Supplementary files

Article information

Article type
Edge Article
Submitted
23 Jul 2021
Accepted
30 Sep 2021
First published
30 Sep 2021
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2021, Advance Article

A switchable sensor and scavenger: detection and removal of fluorinated chemical species by a luminescent metal–organic framework

H. Yin, K. Tan, S. Jensen, S. J. Teat, S. Ullah, X. Hei, E. Velasco, K. Oyekan, N. Meyer, X. Wang, T. Thonhauser, X. Yin and J. Li, Chem. Sci., 2021, Advance Article , DOI: 10.1039/D1SC04070G

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