三氯化二甘氨酸四水合稀土固体配合物的合成及红外光谱研究

在水溶液中制备出配合物［Ｌｎ（Ｇｌｙ）２．４Ｈ２Ｏ］．Ｃｌ３．ｎＨ２Ｏ（Ｌｎ＝Ｇ，Ｅｒ，Ｙｂ），测定了配合物的红外光谱，并对其主要红外吸收带进行了归属。结果表明，甘氨酸以内盐的形式存在于配合物中，并通过羧基与稀土离子配位。四个水分子参与了配位，在Ｇｄ和Ｅｒ的配合物还有一个不分子未参与配位。推测Ｙｂ配合物为对称的一维无限长链结构，其余两种配合物为不对称的一维无限长链。

SYNTHESES AND IR SPECTRAL STUDY OF THE SOLIDE COMPLEXES OF BIGLYCITO-QUADRUAQUO-RARE EARTH CHLORIDES

The title complexes Ln (Gly)2. 4H2O].Cl 3. nH2O (Ln=Gd,Er,Yb) were synthesized in aqueous solution. The iR spectra of the complexes were measured and the principal IR bands were assigned. The result showed that glycine molecules are zwitterions in the complexes and coordinate to rare earth ions through carboxyl groups. Each rare earth ion is coordinated by four water molecules. There is also an uncoordinated water molecule in Gd and Er complex. The structures of the complexes have been proposed.The Yb complex has the symmetric structure of one dimensional chain of infinite length and the other two complexes have the unsymmetric structure of one dimensional chain of infinite length.