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• 作者：Xuemei Liu^a ; ^b ; Bin Liu^a ; ^{liubin@nwu.edu.cn} ; Ganglin Xue^a ;
• 关键词：Ionic crystal ; Polyoxometalate ; Diruthenium ; Magnetism ; Cyclic voltammetry
• 刊名：Solid State Sciences
• 出版年：2012
• 期刊代码：98_12932558
• 类别：ch
• 出版时间：May, 2012
• 卷：14
• 期：5
• 页码：611-615
• 文件大小：593 K

摘要

Three new ionic crystals based on Keggin anion and mixed-valent diruthenium tetracetate, [Ru₂(CH₃CO₂)₄(H₂O)₂]₂[H_nXW₁₂O₄₀]路[Ru₂(CH₃CO₂)₄(H₂O)Cl]路12H₂O {X聽=聽B, n聽=聽3 (1); X聽=聽Si, n聽=聽2 (2); X聽=聽Ge, n聽=聽2 (3)}, have been prepared in acidic aqueous solution at about pH 3.0 by reaction of K₄BW₁₂O₄₀路mH₂O, K₈SiW₁₁O₃₉路mH₂O and K₈GeW₁₁O₃₉路mH₂O with diruthenium tetracetate Ru₂(CH₃COO)₄Cl, respectively, and their structures were determined by X-Ray diffraction analysis. They are isostructural structure with the ratio of heteropolytungstate anion, Ru₂(CH₃CO₂)₄⁺ cation and neutral molecular Ru₂(CH₃CO₂)₄Cl of 1:2:1. The cyclic voltammetry in 0.5聽M KNO₃ aqueous solution at pH 3.0 show the respective electrochemical behaviors of the W-centers and Ru₂-centers for these three complexes. Magnetic data analysis shows that diruthenium units display the ground state electronic configuration 蟺*²未* with large positive D value.