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

作者：Tian Aixiang; Han Zhangang; Peng Jun^*; Ying Jun; Sha Jingquan; Dong Baoxia; Zhai Jiangli; Liu Hongsheng

来源：Inorganica Chimica Acta, 2008, 361(5): 1332-1338.

DOI：10.1016/j.ica.2007.08.033

• alpha-Keggin
• capped polyoxometalate
• hydrothermal synthesis
• electrochemistry

A new alpha-Keggin POM derivative [Cu-2(I)(DF)(2)H2O][(HPMo10Mo2O40)-Mo-VI-O-V{Cu-II(DF)}] (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 [(PMo10Mo2O40)-Mo-VI-O-V](5-) is decorated by a single capping {Cu(DF)}(2+) subunit via four bridging oxygen atoms on a {Mo4O4} pit. The isolated copper dimer unit {Cu-2(I)(DF)(2)H2O}(2+) acts as counter cation, in which the organic ligand DF exhibits a rare coordination mode. Furthermore, the capped Keggin polyoxoanions [(PMo10Mo2O40)-Mo-VI-O-V{Cu-II(DF)}](3-) are fused together via the copper dimers through the weak Cu center dot center dot center dot O interactions to form chains. Hybrid 1 was used as a solid bulk modi. er 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.

• 出版日期2008-4-1
• 单位东北师范大学; 河北师范大学