Noncovalent interaction directing polyoxometalate assembly based on the coordination flexibility of Cu and Ag

详细信息    查看全文

• 作者：Zhangang Han ; ^a ; ^{hanzg116@yahoo.com.cn"" rel=""nofollow} ; Yanna Wang^a ; Jingjing Wu^a ; Xueliang^a ; Zhai ; ^a
• 关键词：Polyoxometalate ; Coordination geometry ; Hydrothermal synthesis ; Copper ; Silver
• 刊名：Solid State Sciences
• 出版年：2011
• 出版时间：August 2011
• 年：2011
• 卷：13
• 期：8
• 页码：1560-1566
• 全文大小：1108 K

文摘

Two new polyoxometalate supramolecular compounds based on the coordination flexibility of the last transition metal Cu and Ag, formulated as [Cu(phen)(H₂O)₃]_0.5[Cu(phen)₂(H₂O)][PMo₁₂O₄₀] (1) and [Ag(phen)₃][Ag(phen)₂]₃[VW₁₂O₄₀]·4H₂O (2) (phen = 1,10-phenanthroline), have been synthesized hydrothermally and characterized by IR, TG, XPS and X-ray diffraction analyses. In 1 two kinds of Cu(II) centres present trigonal bipyramid geometries with different environments of {Cu(1)N₄O} and {Cu(2)N₂O₃}. The silver(I) sites in 2 exhibit unusual six-coordinated {Ag(1)N₆} and usual four-coordinated {Ag(2)N₄} and {Ag(3)N₄}. There is a trimer {[Ag(phen)₂]₃}³⁺ constructed from two Ag(2) bridged by one Ag(3) with the near distance of AgAg = 3.310 Å.