Gd（ClO_4）_3·3H_2O－18C6－CH_3CN三元体系25℃相平衡研究及配合物的合成与表征

STUDY ON PHASE EQUILIBRIUM OF Gd(ClO_4)_3·3H_2O-18C6-CH_3CN SYSTEM AT 25℃ AND SYNTHESIS AND CHARACTERIZATION OF COORDINATION COMPOUNDS

采用半微量相平衡方法研究了Ｇｄ（ＣｌＯ_４）_３·３Ｈ_２Ｏ－１８Ｃ６－ＣＨ_３ＣＮ三元体系在２５℃时的溶解度，测定了饱和溶液的折光率。结果表明，该体系在２５℃时形成两种化学计量的配合物，其组成分别为：Ｇｄ（ＣｌＯ_４）_３·１８Ｃ６·３Ｈ_２Ｏ·２ＣＨ_３ＣＮ和Ｇｄ（ＣｌＯ_４）_３·２（１８Ｃ６）·３Ｈ_２Ｏ·２ＣＨ_３ＣＮ，制备了固态配合物，用化学分析及元素分析、ＩＲ、ＤＴＧ、ＴＧ及ＤＳＣ等研究了配合物的组成与性质。

The solubitities of the system. GGd(ClO_4)_3·3H_2O-18C6-CH_3CN ,at 25℃ have been investigated with the semimicro method of phase eguilibrium.The refractive indexes of saturated solutions have been determined.The results ineicated that two coordination compounds were formed in this system at 2 5℃. The composition of the two coordination compound are: Gd(ClO_4)_3· 18C6·3H_2O·2CH_3CN(Ⅰ) and Cd(ClO_4)_3·2(18C6)·3H_2O·2CH_3CN(Ⅱ).The four Solid coordination compound have been prepared.The chemical analytical results show that the dried samples have the composition:Gd(ClO_4)3· 18C6· 3H_2O(Ⅲ),Gd(ClO_4)_3· 2(18C6)·3H_2O( Ⅳ) and Gd(ClO_4)_3· 18C6(Ⅴ),Gd(ClO_4)_3·2(18C6)(Ⅵ).The properties of the coordination compound (Ⅲ-Ⅳ) have been alse investigated by IR,DTG.TG, DSC and conductivity measurements. The enthalpies of some processes during decomposition have been determined for these two coordination compounds by DSC.