摘要
采用封管氯化的方法[1 ] ,制得铑的标准溶液。在一定条件下处理H3[RhCl6]溶液 ,获得K2 [Rh(H2 O)Cl5]、K3[RhCl6]和 [Rh(H2 O) 6]·(ClO4) 3种态。以K2 [Rh(H2 O)Cl5]和K3[RhCl6]为起始物 ,利用国产 71 7阴离子树脂 ,分别得到trans - [Rh(H2 O) 4 Cl2 ]+、cis- [Rh(H2 O) 4 Cl2 ]+、mer- [Rh(H2 O) 3Cl3]、fac- [Rh(H2 O) 3Cl3]和cis- [Rh(H2 O) 4 Cl4]- 种态。研究它们的紫外 -可见吸收光谱发现 ,随着配位内界水分子数的增加 ,其特征吸收峰表现为紫移。通过分析和研究它们的极性及特性吸收峰 ,提出了铑 (Ⅲ )氯水配合物新的鉴别方法。
A method of sealed-tube chlorination was applied to the preparation of standard solution of rhodium .Dealt with the H 3 solution under a certain condition,K 2[Rh(H 2O)Cl 5],K 3 and hexaaquorhodium(Ⅲ) perchlorate complexes were obtained.Using the salts of K 2[Rh(H 2O)Cl 5] and K 3 as starting materials and taking advantage of 717-anion exchange resin(made in China),the other chloroaquorhodium(Ⅲ) complexes were prepared and isolated out on ion-exchange resin column.The results characterized with UV-Vis spectrophotometer showed that the absorbance spectra of complexes shift towards short-wave direction with increasing the water molecule number in inner sphere of complexes.A new method for characterizating chloroaquorhodium(Ⅲ) complexes was put forward via analyzing their characteristic absorbance spectra and investigating their polarity.
出处
《贵金属》
CAS
CSCD
2003年第2期11-15,48,共6页
Precious Metals
