Gd(NO_3)_3-Phe-H_2O体系(25℃)的相平衡及配合物的合成与性质

PHASE EQUILIBRIUM OF Gd(NO\-3)\-3PheH\-2O (25)\= AND SYNTHESIS AND PROPERTIES OF COMPLEXES

用半微量相平衡方法研究了硝酸钆－苯丙氨酸－水体系的溶度图和饱和溶液折光率曲线。体系中形成两个新配合物Ｇｄ（Ｐｈｅ）（ＮＯ３）３·４Ｈ２Ｏ（Ⅰ）与Ｇｄ（Ｐｈｅ）２（ＮＯ３）３·４Ｈ２Ｏ（Ⅱ）。两者均为固液异成分溶解的化合物。比较讨论了盐的阴离子、氨基酸等对形成配合物的影响。以相图为依据合成了配合物。

The coordination behavior between Gd(NO\-3)\-3 and phenylalanine in water at 25 were investigated by a semimicro method of phase equilibrium study. The solubility diagram and refractive index curve were drawn. The results indicate that there are two new complexes formed in this system at 25, namely, Gd(Phe)(NO\-3)\-34H\-2O () and Gd(Phe)\-2(NO\-3)\-34H\-2O(). Both are of incongruenty in water. The influences of salt anions and amino acids on formation of complexes were discussed. Based on phase equilibrium data, the incongruent complex () were prepared, their composition and properties were investigated by chemical analysis, elemental analysis, infrared spectra and DTGTG.\=\;