Bi-antimony capped Keggin polyoxometalate modified with Cu-ligand fragment

详细信息    查看全文

• 作者：Jiao Huang ; Zhangang Han ; Heng Zhang ; Haitao Yu ; Xueliang Zhai
• 关键词：Polyoxometalate ; Bi-antimony capped Keggin cluster ; Crystal structure ; Cu-ligand
• 刊名：Journal of Solid State Chemistry
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：194
• 期：Complete
• 页码：65-70
• 全文大小：773 K

文摘

Three polyoxometalates consisting of bi-antimony capped Keggin-type clusters: [Cu(mbpy)₂]₂[PMo₁₂O₄₀Sb₂]¡¤4H₂O (rong class=""boldFont"">1rong>), [Cu(mbpy)₂][PMo₁₂O₄₀Sb₂] (rong class=""boldFont"">2rong>) and {Cu(mbpy)[Cu(mbpy)₂]₂}[VMo₈V₄O₄₀Sb₂]¡¤2H₂O (rong class=""boldFont"">3rong>) (mbpy=4,4¡ä-dimethyl-2,2¡ä- dipyridyl in rong class=""boldFont"">1rong> and rong class=""boldFont"">2rong>; 5,5¡ä-dimethyl-2,2¡ä-dipyridyl in rong class=""boldFont"">3rong>) have been synthesized and characterized by IR, X-ray powder diffraction, TG analysis and electrochemical property. Single-crystal analysis revealed that all of three compounds are built upon bi-antimony capped Keggin-type polyoxoanions and Cu-mbpy cations. In rong class=""boldFont"">1rong>-rong class=""boldFont"">3rong>, two Sb^III centers located at the two opposite of anionic surface adopt fundamentally tetragonal pyramidal coordination geometry. Both compounds rong class=""boldFont"">1rong> and rong class=""boldFont"">2rong> consist of P-centered Keggin structure, while compound rong class=""boldFont"">3rong> presents a V-centered Keggin anion. The Keggin-type anions present different structural features: isolated cluster in rong class=""boldFont"">1rong> and Cu-ligand-supported cluster in rong class=""boldFont"">2rong> and rong class=""boldFont"">3rong>.