作者:Rafał Janicki、Przemysław Starynowicz、Anna Mondry
DOI:10.1002/ejic.201100184
日期:2011.8
The crystal and molecular structures of the rare earth carbonates with the general formulae [C(NH2)]3[Ln(CO3)4(H2O)]·2H2O (where Ln = Pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Tb3+) and [C(NH2)]3[Ln(CO3)4]·2H2O (where Ln = Y3+, Dy3+, Ho3+, Er3+, Tm3+, Yb3+, Lu3+) were determined. The crystals consist of monomeric [Ln(CO3)4(H2O)]5– or [Ln(CO3)4]5– complex anions in which the carbonate ligands coordinate to the
通式为[C(NH 2)] 3 [Ln(CO 3)4(H 2 O)] · 2H 2 O的稀土碳酸盐的晶体和分子结构(其中Ln = Pr 3+,Nd 3+,Sm 3+,Eu 3+,Gd 3+,Tb 3+)和[C(NH 2)] 3 [Ln(CO 3)4 ] · 2H 2 O(其中Ln = Y 3+,Dy 3+, Ho 3+,Er 3+,Tm测定了3+,Yb 3+,Lu 3+。晶体由单体[Ln(CO 3)4(H 2 O)] 5–或[Ln(CO 3)4 ] 5–络合阴离子组成,其中碳酸盐配体以双齿方式与Ln 3+离子配位。确定了结晶镧系碳酸盐及其水溶液的光谱学性质(UV / Vis / NIR和IR)。光谱数据与结构数据之间的相关性使我们能够得出结论:[Ln(CO 3)4(OH)] 6–和[Ln(CO 3)4 ] 5–种在轻和重镧系元素溶液中分别占主导地位。还讨论了Ln–O相互作用的性质。实验数据以及理论计算表明,Ln–O(CO