State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, China.
Carbohydr Res. 2011 Oct 18;346(14):2278-84. doi: 10.1016/j.carres.2011.06.032. Epub 2011 Jun 30.
Two complexes of neutral D-galactitol (C(6)H(14)O(6), G) with terbium nitrate, TbGN(I) and TbGN(II), and one complex with samarium nitrate SmGN were synthesized and characterized. From IR, FIR, THz and luminescence spectra the possible coordinations were suggested, and the single-crystal X-ray diffraction results confirm the spectroscopic conclusions. In TbGN(I) (Tb(NO(3))(3)·C(6)H(14)O(6)·3H(2)O), the Tb(3+) is 9-coordinated with three water molecules and six OH groups from two D-galactitol molecules. Nitrate ions do not coordinate to metal ions, which is different from other reported lanthanide nitrate-D-galactitol complexes. In TbGN(II) and SmGN (Ln(NO(3))(3)·C(6)H(14)O(6)), Ln(3+) is 10-coordinated with six OH groups from two D-galactitol molecules and four oxygen from two bidentate nitrate ions, and one nitrate ion is hydrogen bonded. No water exists in the structures. D-Galactitol molecules provide their 1-, 2- and 3-hydroxyl groups to coordinate with one metal ion and their 4-, 5- and 6-hydroxyl groups to coordinate with another metal ion in the three structures. There is still a new topological structure that can be observed for lanthanide-d-galactitol complexes, which indicates that the coordinations between hydroxyl groups and metal ions are complicated.
合成并表征了中性 D-半乳糖醇（C(6)H(14)O(6)，G）与硝酸铽的两个配合物，TbGN(I)和 TbGN(II)，以及一个与硝酸钐的配合物 SmGN。从红外、远红外、太赫兹和发光光谱中提出了可能的配位方式，单晶 X 射线衍射结果证实了光谱结论。在 TbGN(I)（Tb(NO(3))(3)·C(6)H(14)O(6)·3H(2)O）中，Tb(3+) 与三个水分子和两个 D-半乳糖醇分子的六个 OH 基团配位，形成 9 配位。硝酸根离子不与金属离子配位，这与其他报道的镧系元素硝酸盐-D-半乳糖醇配合物不同。在 TbGN(II)和 SmGN（Ln(NO(3))(3)·C(6)H(14)O(6)）中，Ln(3+) 与两个 D-半乳糖醇分子的六个 OH 基团和两个双齿硝酸根离子的四个氧原子配位，一个硝酸根离子与氢键相连。结构中不存在水。D-半乳糖醇分子提供其 1-、2-和 3-羟基与一个金属离子配位，其 4-、5-和 6-羟基与另一个金属离子配位，在这三种结构中都可以观察到新的拓扑结构，这表明羟基与金属离子的配位是复杂的。
