Synthesis and Electrocatalytic Performance of a Polyoxometalate-Based Supramolecular Compound Constructed with Reduced Phosphomolybdate

Abstract

Abstract: A supramolecular compound composed of reduced phosphopolybdate and Fe^II was synthesized by hydrothermal method with sodium molybdate, ferric nitrate, phosphoric acid and triethylenetetramine as raw materials. The chemical formula of the compound is [C₈H₂₄N₄]_1.5[C₆H₂₂N₄]_1.5{Fe[Mo₆O₁₂(OH)₃(PO₄)₃(HPO₄)]₂}·5H₂O (1). Single crystal X-ray diffraction, powder X-ray diffraction (PXRD) and infrared spectroscopy (FT-IR) characterizations show that compound 1 is composed of {Fe[P₄Mo^V₆O₃₁]₂}^22- (denoted by {Fe(P₄Mo₆)₂}), protomated triethyltetramine and protomated N, N′-bis(aminoethyl)-piperazine in a three-dimensional supramolecular structure through hydrogen bond interactions. The results of electrocatalytic performance measurement show that compound 1 has good electrochemical sensing performance and low limit of detection (LOD) for chromium ion (Cr^Ⅵ), iron ion (Fe^Ⅲ), potassium bromate (KBrO₃) and ascorbic acid (AA).

Key words: reduced phosphomolybdate, supramolecular structure, electrocatalytic performance, hydrothermal synthesis method, crystal structure

CLC Number:

O641

LIU Xiaohui, LI Hui, XU Na. Synthesis and Electrocatalytic Performance of a Polyoxometalate-Based Supramolecular Compound Constructed with Reduced Phosphomolybdate[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(11): 2034-2040.

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