A new polymeric chain constructed from isopolyanions and lanthanide cations: Synthesis, crystal structure, and properties of (NH(4))(5)[Ln(NO(3))(2) (H(2)O)(3)][H(2)W(12)O(40)]center dot nH(2)O(Ln = Ce, Pr, Nd, Gd, Dy, Ho)

作者：Shi Dongmei; Yu Haixia; Pang Haijun; Chen Yaguang^*

来源：Solid State Sciences, 2008, 10(7): 847-853.

DOI：10.1016/j.solidstatesciences.2007.10.033

• isopolyanion
• lanthanide complex
• 1D chain
• electrochemistry
• luminescence

A series of 1:1 composite compounds prepared with the isopolyanions and lanthanide cations, (NH(4))(5)[Ln(NO(3))(2)(H(2)O)(3)][H(2)W(12)O(40)]center dot nH(2)O (Ln = Ce(III) (1); Pr(III) (2); Nd(III) (3); Gd(III), n = 1 (4); Dy(III) (5); Ho(III), n = 1 (6)) were synthesized at room temperature and characterized by single-crystal X-ray structural analysis, elemental analyses, IR spectra, thermogravimetry analyses and cyclic voltammetry. X-ray structural analysis reveals that these structures are isostructural: polyanions are bridged by Ln ions via the coordination of the bridging oxygen atoms and terminal oxygen atoms, forming a W-Ot'-Ln-Ob-W linkage; and through the W-Ot'-Ln-Ob-W linkage a one-dimension infinite linear chain with alternating cations and anions is formed. Compounds 1-6 represent the first example where two types of inorganic oxoanions (NO(3)(-) and [H(2)W(12)O(40)](6-)) simultaneously coordinating to Ln(III), in which the NO(3-) ions act as the bidentate ligands coordinating to the Ln(III), forming a four-membered ring. The room temperature luminescent studies indicate that 3 exhibits strong luminescence in the near-IR region.

• 出版日期2008-7
• 单位东北师范大学; 齐齐哈尔大学