A new Cu^II(4,5-diazafluoren-9-one)-capped Keggin derivative: Hydrothermal synthesis and crystal characterization

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• 作者：Aixiang Tian ; Zhangang Han ; Jun Peng ; Jun Ying ; Jingquan Sha ; Baoxia Dong ; Jiangli Zhai ; Hongsheng Liu
• 关键词： ; //www.sciencedirect.com/scidirimg/entities/204e.gif"" alt=""greek small letter alpha"" title=""greek small letter alpha"" border=""0"">-Keggin ; Capped polyoxometalate ; Hydrothermal synthesis ; Electrochemistry
• 刊名：Inorganica Chimica Acta
• 出版年：2008
• 出版时间：1 April 2008
• 年：2008
• 卷：361
• 期：5
• 页码：1332-1338
• 全文大小：1087 K

文摘

A new -Keggin POM derivative (1) (DF = 4,5-diazafluoren-9-one) has been prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, IR, XPS spectra, thermogravimetric analysis and cyclic voltammetry. In compound 1, the polyoxoanion cluster is decorated by a single capping {Cu(DF)}²⁺ subunit via four bridging oxygen atoms on a {Mo₄O₄} pit. The isolated copper dimer unit acts as counter cation, in which the organic ligand DF exhibits a rare coordination mode. Furthermore, the capped Keggin polyoxoanions are fused together via the copper dimers through the weak Cu O interactions to form chains. Hybrid 1 was used as a solid bulk modifier to fabricate a carbon paste electrode (1-CPE) by direct mixing. The electrochemical and electrocatalytic behaviors of the 1-CPE have been studied in detail.