Issue 13, 2025

A Ni-added polyoxometalate: synthesis, structure and catalytic performance

Abstract

A Ni6-added polyoxometalate, (NH4)0.5Cs1.5K4Na3[Ni(H2O)6][{BO(OH)2}2Ni6(OH)(H2O)6(SiW10O37)2]·8H2O (1), was made with the guidance of the “lacunary-directing synthesis” strategy using a hydrothermal method and characterized by single crystal/powder X-ray diffraction, solid-state UV-vis spectroscopy, FT-IR spectroscopy, and thermogravimetric analysis. The polyoxoanion of 1 could be conceptually constructed by the synergistic directing effect of two dilacunary B-α-SiW10O37 fragments linked by a central [{BO(OH)2}2Ni6(OH)(H2O)6]9+ ({B2Ni6}) via Ni–O–W and Ni–O–Si linkages. The {B2Ni6} cluster was composed of a V-shaped {Ni6} core with an angle of 54.6° and further decorated with two BO(OH)2 groups. Furthermore, 1 could be applied in the Knoevenagel condensation reaction as a Lewis catalyst and exhibited excellent catalytic activity under mild reaction conditions.

Graphical abstract: A Ni-added polyoxometalate: synthesis, structure and catalytic performance

Supplementary files

Article information

Article type
Paper
Submitted
16 Jan 2025
Accepted
11 Feb 2025
First published
13 Feb 2025

CrystEngComm, 2025,27, 1879-1886

A Ni-added polyoxometalate: synthesis, structure and catalytic performance

Z. Zhang, Z. Wang, Y. Wang, J. Chen, Y. Wang and G. Yang, CrystEngComm, 2025, 27, 1879 DOI: 10.1039/D5CE00060B

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