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Updated: Apr 17, 2026
Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Assembly of cyanometalate-functionalized phosphotungstates with magnetic properties and bifunctional electrocatalytic
Ya Wang1, Ming-Hui Sun, Feng-Yan Li
1Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, PR China. linxu@nenu.edu.cn lify525@nenu.edu.cn.
Abstract:
Two cyanometalate-functionalized heteropolytungstates (C4H10ON)23[HN(CH2CH2OH)3]11H[Fe(III()CN)6(α2-P2W17O61Ni(II))4]·31H2O (1) and (C4H10ON)23[HN(CH2CH2OH)3]10H2[Fe(III)(CN)6(α2-P2W17O61Co(II))4]·27H2O (2) (C4H10ON = morpholine, HN(CH2CH2OH)3 = triethanol amine) have been successfully synthesized in aqueous solution under conventional reaction conditions, which demonstrated that it is a successful strategy to incorporate the cyanometalate fragment into lacunary heteropolytungstates. These polyanions were characterized by single-crystal X-ray diffraction, IR spectra, elemental analysis, thermogravimetric analysis, magnetic studies, and electrochemistry. Interestingly, the electrochemical studies have shown that the two complexes have bifunctional electrocatalytic activities towards not only the reduction of potassium iodate (KIO3) ascribed to the function of POM, but also the oxidation of the biological molecule ascorbic acid (AA) ascribed to the Fe-center in [M(II)4Fe(III)(CN)6](5+). Significantly, the magnetic investigations demonstrate the presence of ferromagnetic exchange interactions in 1 (Ni4Fe) and antiferromagnetic interactions in 2 (Co4Fe).
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