EXTRACTION OF AUROCYANIDE ION-PAIRS BY POLY(OXYETHYLENE) EXTRACTANTS

被引：35

作者：

ADAMS, MD ^{[1
]}

WADE, PW ^{[1
]}

HANCOCK, RD ^{[1
]}

机构：

[1] UNIV WITWATERSRAND,JOHANNESBURG 2001,SOUTH AFRICA

来源：

TALANTA | 1990年 / 37卷 / 09期

关键词：

D O I：

10.1016/0039-9140(90)80246-C

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Aurocyanide ion-pairs with alkali-metal ions are extracted efficiently into organic phases with the aid of long-chain polyethers. The results of distribution experiments can be rationalized by molecular mechanics calculations. The polyether is shown to co-ordinate to the alkali-metal cation through the ether oxygen atoms, wrapping around the cation in a helical configuration. High extraction efficiencies are obtained with high dielectric-constant solvents, which tend to stabilize the helical polyether-cation complex. The preferential secondary solvation of the aurocyanide anion by the chosen solvents also has an important influence on the extraction efficiency. © 1990.

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页码：875 / 883

页数：9

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