化学学报 ›› 1983, Vol. 41 ›› Issue (2): 144-148. 上一篇    下一篇

研究论文

稀土元素及其显色效应的研究 VI:镧-偶氮氯膦III---钇混合多核配合物的生成

沈含熙;刘曾宁   

  1. 南开大学化学系
  • 发布日期:1983-02-15

Studies on the cocoloration effect for rare earthsVI: The formation of mixed polynuclear complex lanthanum-chlorophosphonazo III-yttrium.

SHEN HANXI;LIU ZENGNING   

  • Published:1983-02-15

关键词: 显色反应, 硫代磷酸 P, 苯偶氮化合物, 有机氯化合物, 稀土元素, 镧, 多核络合物, 钇, 萘二磺酸 P, 偶氮氯膦

The interference of lanthanum in the spectrophotometric determination of yttrium in the form of β-type complex with chlorophosphonazo III (CPA III) is proved to be a cocoloration effect. It is due to the formation of a mixed polynuclear complex between CPA III and lanthahum-yttrium with a cyclic structure. The composition of the complex has been established to be La:CPA III:Y = 1:2:1 by the method of molar ratio. The optimal conditions for the formation of polynuclear complex and influence factors have also been studied. A "replacement type" reaction is proposed to account for the cocoloration effect.

Key words: COLOR REACTION, PHOSPHOROTHIOIC ACID P, BENZENE AZO COMPOUNDS, ORGANO CHLORIDE COMPOUNDS, RARE ELEMENT, LANTHANUM, POLYNUCLEAR COMPLEX, YTTRIUM, NAPHTHALENEDISULFONIC ACID P, CHLOROPHOSPHONAZO

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