GdCl_3·3H_2O-18C6-C_2H_5OH体系(25℃)的相化学及固态配合物的合成与表征  

Phase Chemistry of GdCl_3·3H_2O-18C6-C_2H_5OH System at 25℃ and Synthesis and Characterization of Solid Complexes

作　　者：刘红科[1] 李谦定[2] 任非[1] 高胜利[1] 任德厚[1] 

机构地区：[1]西北大学化学系,陕西西安710069 [2]西安石油学院石油化学工程系,陕西西安710065

出　　处：《稀土》2001年第3期10-14,共5页Chinese Rare Earths

摘　　要：采用半微量相平衡方法研究了 Gd Cl3· 3H2 O - 18C6 - C2 H5 OH三元体系 (2 5℃ )的溶解度 ,测定了各饱和溶液的折光率 ,考察了相平衡过程中水的行为。绘制了体系的溶解度图与饱和溶液折光率曲线。发现了两种未见文献报道的配合物 :3Gd Cl3· 18C6· 9H2 O· C2 H5 OH与 Gd Cl3· 18C6· 3H2 O。前者为固液异成分溶解的配合物 ,后者为固液同成分溶解的配合物。制备了固态配合物 ,通过化学分析、IR、DTG、TG以及 DSC研究了配合物的组成与性质 ,由 DSC得到了配合物若干分解步骤的焓变。用热化学方法求得了固态配合物 Gd Cl3· 18C6· 3H2 O(s)The solubilities of GdCl 3·3H 2O-18C6-C 2H 5OH ternary system at 25℃ were investigated by a semimicro method for study of phase equilibrium,and the refractive indexes of saturated solutions were determined.The behavior of water in this system during the equilibrium was examined.The cooresponding solubility diagram and refractive index curve of saturated solutions were constructed.It was found that there are two kinds of complexes formed in the system,namely,3GdCl 3·18C6·9H 2O·C 2H 5OH and GdCl 3·18C6·3H 2O.The complexes are not yet found in literatures.Two solid complexes were prepared and characterized by IR spectra,DTG and DSC,the enthalpies of some steps during the decomposition were obtained,and the standard formation enthalpy of the solid complex GdCl 3·18C6·3H 2O(s) were obtained by means of a thermochemical cycle suggested in this paper.

关 键 词：三水氯化钆 冠醚18C6 配全物 相化学 标准生成焓 合成 组成 表征 稀土 热化学 无水乙醇 

分 类 号：O614.339[理学—无机化学] O642[理学—化学]