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Polyoxometalates 2024, 3(1): 9140039 https://doi.org/10.26599/POM.2023.9140039
Research Article | Open Access | Issue | Published: 19 October 2023

Hydrothermal synthesis, structure, and catalytic properties of a (4,6)-connected framework constructed from Keggin-type polyoxometalate units and tetranuclear copper complexes

Show Author's Information Jia-Yu Sun,  Zi-Lan Wang,  Zhong Zhang ( ),  Guo-Cheng Liu,  Xiu-Li Wang ( )
College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China
Keywords:
catalytic oxidation, polyoxometalates, sulfides, Keggin-type, metal–organic complex
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Sun J-Y, Wang Z-L, Zhang Z, et al. Hydrothermal synthesis, structure, and catalytic properties of a (4,6)-connected framework constructed from Keggin-type polyoxometalate units and tetranuclear copper complexes. Polyoxometalates, 2024, 3(1): 9140039. https://doi.org/10.26599/POM.2023.9140039
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Abstract Full text Electronic supplementary material About this article

Under hydrothermal conditions, a Keggin-type polyoxometalate-based metal–organic complex, H4{[Cu4(EDDP)2(H2O)5]1.5(SiW12O40)}∙7.5H2O (CuW-EDDP, H4EDDP = ethylene-diamine-N,N'-dipropionic acid), was synthesized by reacting Na10[A-α-SiW9O34]·18H2O and CuCl2·2H2O in the presence of H4EDDP ligands and characterized by powder and single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, and thermogravimetry. Interestingly, CuW-EDDP exhibited a three-dimensional structure with (4,6)-connected constructed from [SiW12O40]4− units and tetranuclear Cu complexes [Cu4(EDDP)2(H2O)5]. As an effective heterogeneous catalyst, CuW-EDDP exhibited excellent performance, good reusability, and structural stability in the selective oxidation of methyl phenyl sulfide with high conversion (100%) and selectivity (98%) within 30 min. Furthermore, the catalytic activity of CuW-EDDP in the oxidation of other sulfide derivatives was investigated.


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About this article

Hydrothermal synthesis, structure, and catalytic properties of a (4,6)-connected framework constructed from Keggin-type polyoxometalate units and tetranuclear copper complexes

Show Author's information Jia-Yu Sun, Zi-Lan Wang, Zhong Zhang ( ), Guo-Cheng Liu, Xiu-Li Wang ( )
College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China

Abstract

Under hydrothermal conditions, a Keggin-type polyoxometalate-based metal–organic complex, H4{[Cu4(EDDP)2(H2O)5]1.5(SiW12O40)}∙7.5H2O (CuW-EDDP, H4EDDP = ethylene-diamine-N,N'-dipropionic acid), was synthesized by reacting Na10[A-α-SiW9O34]·18H2O and CuCl2·2H2O in the presence of H4EDDP ligands and characterized by powder and single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, and thermogravimetry. Interestingly, CuW-EDDP exhibited a three-dimensional structure with (4,6)-connected constructed from [SiW12O40]4− units and tetranuclear Cu complexes [Cu4(EDDP)2(H2O)5]. As an effective heterogeneous catalyst, CuW-EDDP exhibited excellent performance, good reusability, and structural stability in the selective oxidation of methyl phenyl sulfide with high conversion (100%) and selectivity (98%) within 30 min. Furthermore, the catalytic activity of CuW-EDDP in the oxidation of other sulfide derivatives was investigated.

Keywords: catalytic oxidation, polyoxometalates, sulfides, Keggin-type, metal–organic complex

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Publication history

Received: 24 August 2023
Revised: 21 September 2023
Accepted: 28 September 2023
Published: 19 October 2023
Issue date: March 2024

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

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 21901018, 21971024, 22271021), and the Natural Science Foundation of Liaoning province (No. 2022-MS-373).

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