Gd（NO_3）_3·3H_2O与冠醚18C6在无水乙腈中配合行为的研究  

Studies on Coofdination Behavior between Gd(NO_3)_3·3H_2O and Crown Ether 18C6 in Absolute Acetonitrile

作　　者：张强[1] 刘世昌[1] 武登国[1] 

机构地区：[1]内蒙古师范大学化学系,内蒙古大学化学系

出　　处：《内蒙古大学学报（自然科学版）》1994年第5期530-534,共5页Journal of Inner Mongolia University：Natural Science Edition

摘　　要：本文用半微量相平衡方法研究了Ｇｄ（ＮＯ＿３）＿３·３Ｈ＿２Ｏ─１８Ｃ６─ＣＨ＿３ＣＮ三元体系在２０℃的溶解度，并测定了体系在２０℃各饱和溶液的折光率。结果表明，该体系中仅有一种化学计量的配合物生成，溶解度曲线与配合物Ｇｄ（ＮＯ＿３）＿３·１８Ｃ６·３Ｈ＿２Ｏ的固相相对应，该配合物存在的相区较大，排除了其它组成配合物存在的可能性，为在乙腈中合成该配合物合理选择盐、醚比提供了依据。另外，试验考察了相平衡过程中水的行为，分离出了固态配合物，利用化学分析、ＩＲ、ＴＧ、ＤＴＧ研究了该固态配合物的组成和性质。In this paper, the solubilities of ternary system Gd(NO_3)_3·3H_2O-18C6-CH_3CN, at 20℃ havebeen investigated by the semimicro method for the study of phase equilibrium. The refractive in-dices for satuated solutions at 20℃ have been determined for this system. The results indicatedthat there is only one stoichiometry complex formed in the ternary system. The solubility curvecorresponds to the solid phase of the complex Gd(NO_3)_3·18C6·3H_2O. The behavior of waterfor this system in equilibrium has been examined. The results are: the mole ratio, H_2O/Gd(NO_3)_3,no matter whether it is in liquid phase or solid phase, is always 3: 1. We have isolated the com-plex formed in this solvent. The composition and properties of this complex have been examinedby chemical analysis, infrared spectra and thermoanalysis.

关 键 词：相平衡 冠醚 硝酸钆 钆络合物 乙腈 

分 类 号：O614.339[理学—无机化学]