稀土离子水解聚合作用的研究(Ⅲ)——Eu^(3+)和Gd^(3+)在溶液中的状态  

Studies on Hydrolytic Polymerization of Rare Earth Ions(Ⅳ)——Hydrolytic Polymerization of Eu^(3+) and Gd^(3+) Ion

作　　者：罗勤慧[1] 丁益 沈孟长[1] Luo Qinhui;Ding Yi;Shen Mengchang(Coordination Chemistry Research Institute,Nanjing University,Nanjing)

机构地区：[1]南京大学配位化学研究所

出　　处：《高等学校化学学报》1985年第3期201-205,共5页Chemical Journal of Chinese Universities

基　　金：中国科学院自然科学基金资助课题。

摘　　要：本文用电位法研究Eu^(3+)、Gd^(3+)的水解聚合作用.采用两种方法确定水解产物的组成及其平衡常数.实验结果表明,Eu^(3+)和Gd^(3+)在溶液中的状态与Sm^(3+)相同.Hydrolyiic polymerization of Eu^(3+) and Gd^(3+)ion was studied by potenliomclry at 25 ±0. 1℃.The concentration of rare earth ions ranged from 0. 1M to 0.6M and the ionic strength was kept at 2M NO^(3-) with NaNO_(3) by self medium method. The composition and the hydrolysis constants of hydrolytic products were calculated by two different methods, the results of which agreed with each other fairly well.The hydrolytic state of Eu^(3+) and Gd5+ion was shown to be the same as that of Sm^(3+), but the degree of polymerization of the former two ions was higher.They formed poly-nuclear species. M_(2)(OH)_(2)^(4+),M_(3)(OH)_(4)^(5+) and M4(OH)_(6)^(6+) besides mononuclear species.

关 键 词：平衡常数 电位法 稀土离子 水解聚合 水解产物 溶液 状态 

分 类 号：O64[理学—物理化学]