College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
Chem Commun (Camb). 2019 Feb 28;55(19):2857-2860. doi: 10.1039/c9cc00073a.
A series of new Ln14-substituted polyoxometalates, H27Na16[(Ln14(H2O)W4(OH)O14)(WO4)4(GeW10O38)6]·nH2O (n ≈ 86) (1-Ln, Ln = Eu, Gd, Tb, Dy, Ho, Er), which contain 14 Ln3+ and 6 {α(1,5)-[GeW10O38]12-} units, has been synthesized in one-pot reactions. As the first 14-Ln-containing polyoxometalates, the octahedron-shaped three-shell structure of the [(Ln14(H2O)W4(OH)O14)(WO4)4(GeW10O38)6]43- polyanion is made up of a W4 tetrahedron, a Ln14W4 tetrahedron and a Ge6W60 octahedron. Compound 1-Dy exhibits frequency dependent magnetic properties. Compounds 1-Eu, 1-Tb and 1-Dy exhibit the characteristic emission bands of the Ln3+ ion.
一系列新的Ln14 取代的多金属氧酸盐,H27Na16[(Ln14(H2O)W4(OH)O14)(WO4)4(GeW10O38)6]·nH2O(n≈86)(1-Ln,Ln=Eu,Gd,Tb,Dy,Ho,Er),含有 14 个 Ln3+和 6 个{α(1,5)-[GeW10O38]12-}单元,是在一锅反应中合成的。作为第一个 14-Ln 多金属氧酸盐,[(Ln14(H2O)W4(OH)O14)(WO4)4(GeW10O38)6]43-多阴离子的八面体形三层结构由一个 W4 四面体、一个 Ln14W4 四面体和一个 Ge6W60 八面体组成。化合物 1-Dy 表现出频率相关的磁性性质。化合物 1-Eu、1-Tb 和 1-Dy 表现出 Ln3+离子的特征发射带。