两个Keggin结构锗钨酸盐稀土衍生物的合成、晶体结构及表征

合成了两个基于Dy3＋阳离子和单缺位Keggin阴离子GeW11O39]8-的锗钨酸盐, (CH3)4N]1.5H3.5Dy(H2O)2(GeW11O39)]×1.5H2O (1) 和Cu(Hen)(en)]2Cu(H2O)3]0.5{Cu(H2en)(Hen)]

Synthesis,Crystal Structure and Characterization of Two Rare Earth Substituted Keggin‐Type Germanotungstates

Two germanotungstates based on the dysprosium cations and monovacant Keggin anions GeW₁₁O₃₉]^8?, (CH₃)₄N]_1.5H_3.5Dy(H₂O)₂(GeW₁₁O₃₉)]·1.5H₂O ( 1 ) and Cu(Hen)(en)]₂Cu(H₂O)₃]_0.5{Cu(H₂en)(Hen)]‐Cu(H₂O)₃]_0.5Dy(GeW₁₁O₃₉)₂]}·1.25H₂O ( 2 ), have been synthesized and characterized by elemental analysis, inductively coupled plasma (ICP) analysis, IR spectroscopy, thermal analysis, and single‐crystal X‐ray diffraction. Crystal data for 1 : monoclinic, space group C2/c with cell dimensions of a=2.8201(5) nm, b=2.2885(3) nm, c=2.4033(4) nm, β=123.875(2)°, V=12.878(4) nm³, Z=8, µ=21.239 mm^?1; and for 2 : monoclinic, space group P2₁/n with cell dimensions of a=2.12808(5) nm, b=1.63834(4) nm, c=3.18074(4) nm, β=93.760(2)°, V=11.0658(5) nm³, Z=4, µ=24.803 mm^?1. The Dy³⁺/GeW₁₁O₃₉]^8? ratio of compound 1 is 1:1, and it displays an interesting one dimensional chainlike arrangement. And the Dy³⁺/GeW₁₁O₃₉]^8? ratio of compound 2 is 1:2 , and it shows a typical dimeric structure.