COMPLEXATION OF AMERICIUM(III) WITH CROWN ETHERS IN AQUEOUS PHASE

被引：0
|
作者：
MOHAPATRA, PK [1 ]
MANCHANDA, VK [1 ]
机构：
[1] BHABHA ATOM RES CTR,DIV RADIOCHEM,BOMBAY 400085,INDIA
来源：
RADIOCHIMICA ACTA | 1991年 / 55卷 / 04期
关键词：
AMERICIUM; CROWN ETHER; SOLVENT EXTRACTION; PICRIC ACID; COMPLEXATION;
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The complexation behaviour of Am(III) with 12-crown-4, 15-crown-5, 18-crown-6 and dicyclohexyl-18-crown-6 in aqueous phase has been investigated using the solvent extraction tracer technique, keeping [ligand] to [metal] ratio as high as 10(6). As a consequence, very low complex formation constants (log-beta-1 = 0.21 +/- 0.01) were measured. In our experimental conditions, 12-crown-4 forms 1:3 complex species, 15-crown-5 and 18-crown-6 form 1:2 species and dicyclohexyl-18-crown-6 forms 1:1 species with Am(III). The overall extraction equilibria were found to be enthalpy stabilized and entropy destabilized.
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页码：193 / 197
页数：5
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