Issue 3, 2022

A series of POM-based compounds by tuning coordination groups and spacers of ligands: electrocatalytic, capacitive and photoelectrocatalytic properties

Abstract

Seven polyoxometalate-based compounds were synthesized under hydrothermal conditions, namely [Co(H2Ptep)(HPtep)(H2O)2(PW11CoO39)]·4.5H2O (1), {[Cu(H3Ptep)2(H2Ptep)2][SiW12O40]}·(SiW12O40)2·8H2O (2), {Cu3(H2Ptpi)2(Ptpi)2(H2O)5[(PMo11CuO39)2]}·6H2O (3), [Co(H2Ptpi)2(HPtpi)2(SiMo12O40)2]·2H2O (4), [Co3(Ptpi)2(H2O)6(TeMo6O24)]·2H2O (5), [Co2Na(HPtpi)(H2O)7.5(TeMo6O24)]·3.5H2O (6), [Cu(HZtpi)(H2O)2(CrMo6(OH)6O18)]·5H2O (7) (Ptep = 1-[2-(3-pyridin-4-yl-[1,2,4]triazol-4-yl)-ethyl]-piperazine, Ptpi = 1-[2-(3-pyridin-4-yl-[1,2,4]triazol-4-yl)-propyl]-imidazol, Ztpi = 1-[2-(3-pyrazin-4-yl-[1,2,4]triazol-4-yl)-propyl]-imidazol). Compounds 1–4 are all based on Keggin anions, especially 1 and 3 containing TMs monosubstituted Keggin anions. Compounds 5–7 are all based on Anderson anions. Compounds 1–4, 6 and 7 exhibit 0D, 1D and 2D structures, while compound 5 has a 3D structural framework. These seven compounds have excellent electrochemical properties and can be used as sensors for the amperometric detection of Cr(VI) and NO2. Among them, 1 and 4 possess favorable capacitance performance. Furthermore, compounds 3 and 4 have photoelectrocatalytic properties and can be used for the photoelectrocatalytic degradation of organic dye MB.

Graphical abstract: A series of POM-based compounds by tuning coordination groups and spacers of ligands: electrocatalytic, capacitive and photoelectrocatalytic properties

Supplementary files

Article information

Article type
Paper
Submitted
20 Oct 2021
Accepted
07 Dec 2021
First published
08 Dec 2021

CrystEngComm, 2022,24, 587-600

A series of POM-based compounds by tuning coordination groups and spacers of ligands: electrocatalytic, capacitive and photoelectrocatalytic properties

C. Sun, J. Ying, Y. Zhang, L. Jin, A. Tian and X. Wang, CrystEngComm, 2022, 24, 587 DOI: 10.1039/D1CE01419F

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