Issue 48, 2021

Inorganic–organic hybrid supramolecular architectures based on Keggin polyoxometalates and crown ether: synthesis, crystal structure and electrochemical properties

Abstract

Two novel supramolecular assemblies built from Keggin-type polyoxometalate and [18]-crown-6 ether building blocks, (K+)4([18]-crown-6)4(CH3CN)2[SiM12O40] (M = Mo (1), W (2)), have been synthesized and characterized via single-crystal/powder X-ray diffraction and a wide range of analytical methods, including FT-IR, UV-vis, Raman, and NMR spectroscopy, thermogravimetric analysis, and density functional theory (DFT) calculations. This POM-based supramolecular architecture is the first example of a Keggin-type POM linked to four 18-crown-6 components forming unique propeller-like supramolecular host–guest structures via crown–metal–O(POM) bonds in the forms of the isostructural compounds 1 and 2. In addition, the electrochemical behaviors and electrocatalytic properties toward the reduction of sodium nitrite (NaNO2) were also investigated via cyclic voltammetry in acidic solution.

Graphical abstract: Inorganic–organic hybrid supramolecular architectures based on Keggin polyoxometalates and crown ether: synthesis, crystal structure and electrochemical properties

Supplementary files

Article information

Article type
Paper
Submitted
04 sep. 2021
Accepted
27 oct. 2021
First published
02 nov. 2021

CrystEngComm, 2021,23, 8482-8489

Inorganic–organic hybrid supramolecular architectures based on Keggin polyoxometalates and crown ether: synthesis, crystal structure and electrochemical properties

J. Shi, H. Zhang, P. Wang, P. Wang, J. Zha, Y. Liu, J. Gautam, L. Zhang, Y. Wang, J. Xie, L. Ni, G. Diao and Y. Wei, CrystEngComm, 2021, 23, 8482 DOI: 10.1039/D1CE01203G

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