中文摘要：

制备了两种半乳糖醇氯化钆配合物,其中一种是金属离子与配体摩尔比为2∶1的配合物,钆离子与半乳糖醇的3个羟基及6个水分子配位,其它水分子以结晶水的形式存在,氯离子不参加配位;另一种配合物根据红外光谱、元素分析、差热热重分析、远红外光谱以及太赫兹光谱推测可能是钆离子与2个半乳糖醇分子的6个羟基以及3个水分子配位,形成1∶1配合物.实验结果表明,红外光谱法可直接对糖配合物的结构提供重要信息,半乳糖醇与稀土离子之间可以形成多种配合物,金属离子与糖的羟基存在着复杂的相互作用.

英文摘要：

The interaction of carbohydrates with metal cations is of great interest as it occurs during many important biological processes and other applications,such as food and pharmacy.In this work,two GdCl3-galactitol complexes were synthesized.One is 2GdCl3／5C6H14O6／514H2O,in which Gd3＋ is coordinated to three hydroxyl groups of galactitol and six water molecules,other water molecules are hydrogen-bonded and chloride ions do not coordinate to metal ions.For the second GdCl3-galactitol complex,its single crystal is not available.On the basis of its IR spectrum,elemental analysis,Far-IR spectrum,THz spectrum and TGA results,its possible structure may be suggested as that Gd3＋ is nine-coordinated to six hydroxyl groups from two galactitol molecules and three water molecules,the ratio of metal to galactitol is 1：1 and maybe several water molecules are hydrogen-bonded in the structure.The suggested structure is in agreement with the IR spectrum and TGA results.The formation of two lanthanide-galactitol complexes demonstrates the complexity of the interactions between metal ions and hydroxyl groups.