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Polyoxometalates 2023, 2(4): 9140041 https://doi.org/10.26599/POM.2023.9140041
Research Article | Open Access | Issue | Published: 03 November 2023

A double-tartrate-bridged deca-nuclearity europium-tungsten cluster embedded selenotungstate and its selective optical sensing of o-nitrophenol

Show Author's Information Yong-Chao Dai1,2,  Si-Yu Zhang2,  Xin-Xian Xiao2,  Meng-Juan Li2,  Jian-Cai Liu1,2( ),  Li-Juan Chen2 ( ),  Jun-Wei Zhao2 ( )
School of Energy Science and Technology, Henan University, Zhengzhou 450046, China
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China
Keywords:
lanthanide, selenotungstate, photoluminescence sensing, o-nitrophenol, sensing mechanism
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Dai Y-C, Zhang S-Y, Xiao X-X, et al. A double-tartrate-bridged deca-nuclearity europium-tungsten cluster embedded selenotungstate and its selective optical sensing of o-nitrophenol. Polyoxometalates, 2023, 2(4): 9140041. https://doi.org/10.26599/POM.2023.9140041
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Abstract Full text Electronic supplementary material About this article

An inorganic–organic hybrid Eu–W-implanted tartrate-connected selenotungstate tetramer {[Eu4(H2O)12W6O12(tar)2][B-α-SeW9O33]4}16− (1a, H4tar = tartaric acid) was successfully obtained by introducing the flexible multidentate tartrate ligand into the Se-templated lacunary polyoxometalate (POM) and lanthanide (Ln) system. Within 1a, two identical penta-nuclear Eu2W3-cluster-encapsulated dimeric units {[Eu2(H2O)6W3O6][B-α-SeW9O33]2}4− are arranged in an ''open C-shaped'' configuration, interconnected by double tetra-dentate tar4− linkers. Moreover, 1a demonstrates notable stability and intense photoluminescence (PL) emission in an aqueous environment. This emission proves effective in discriminating the toxic chemical pollutant o-nitrophenol (o-NP) from its isomers m-nitrophenol (m-NP) and p-nitrophenol (p-NP), achieving highly selective and sensitive discrimination of o-NP with a low detection limit of 0.73 μM. The practical applicability of probe 1a was demonstrated in lake water, exhibiting suitable recoveries. The PL sensing mechanism involving static quenching and competitive absorption was elucidated finally. This accomplishment sets the groundwork for the deliberate synthesis of novel organic ligands and Ln-functionalized POM hybrids. Furthermore, it propels the exploration of POM materials for the recognition of environmental pollutants.


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About this article

A double-tartrate-bridged deca-nuclearity europium-tungsten cluster embedded selenotungstate and its selective optical sensing of o-nitrophenol

Show Author's information Yong-Chao Dai1,2, Si-Yu Zhang2, Xin-Xian Xiao2, Meng-Juan Li2, Jian-Cai Liu1,2( ), Li-Juan Chen2 ( ), Jun-Wei Zhao2 ( )
School of Energy Science and Technology, Henan University, Zhengzhou 450046, China
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China

Abstract

An inorganic–organic hybrid Eu–W-implanted tartrate-connected selenotungstate tetramer {[Eu4(H2O)12W6O12(tar)2][B-α-SeW9O33]4}16− (1a, H4tar = tartaric acid) was successfully obtained by introducing the flexible multidentate tartrate ligand into the Se-templated lacunary polyoxometalate (POM) and lanthanide (Ln) system. Within 1a, two identical penta-nuclear Eu2W3-cluster-encapsulated dimeric units {[Eu2(H2O)6W3O6][B-α-SeW9O33]2}4− are arranged in an ''open C-shaped'' configuration, interconnected by double tetra-dentate tar4− linkers. Moreover, 1a demonstrates notable stability and intense photoluminescence (PL) emission in an aqueous environment. This emission proves effective in discriminating the toxic chemical pollutant o-nitrophenol (o-NP) from its isomers m-nitrophenol (m-NP) and p-nitrophenol (p-NP), achieving highly selective and sensitive discrimination of o-NP with a low detection limit of 0.73 μM. The practical applicability of probe 1a was demonstrated in lake water, exhibiting suitable recoveries. The PL sensing mechanism involving static quenching and competitive absorption was elucidated finally. This accomplishment sets the groundwork for the deliberate synthesis of novel organic ligands and Ln-functionalized POM hybrids. Furthermore, it propels the exploration of POM materials for the recognition of environmental pollutants.

Keywords: lanthanide, selenotungstate, photoluminescence sensing, o-nitrophenol, sensing mechanism

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Publication history

Received: 18 August 2023
Revised: 17 September 2023
Accepted: 11 October 2023
Published: 03 November 2023
Issue date: December 2023

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© The Author(s) 2023. Polyoxometalates published by Tsinghua University Press.

Acknowledgements

Acknowledgements

We acknowledge the financial support from the National Natural Science Foundation of China (Nos. 22071042, 22101072, 22171070, and 21871077), the Program for Innovation Teams in Science and Technology in Universities of Henan Province (No. 20IRTSTHN004), and China Postdoctoral Science Foundation (No. 2021M701067).

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