Palladium(II) extraction by sulfur-containing calix[4,6]arenes from hydrochloric acid solutions

被引：15

作者：

Torgov, V. G. ^{[1
]}

Kostin, G. A. ^{[1
]}

Mashukov, V. I. ^{[1
]}

Korda, T. M. ^{[1
]}

Drapailo, A. B. ^{[2
]}

Kas'yan, O. V. ^{[2
]}

Kal'chenko, V. I. ^{[2
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Nikolaev Inst Inorgan Chem, Novosibirsk 630090, Russia

[2] Natl Acad Sci Ukraine, Inst Organ Chem, Kiev, Ukraine

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2008年 / 53卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1134/S0036023608110235

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The comparison of the extraction properties of calixarenes, thiacalixarenes, and calix[4,6]arene thioethers showed that methyl(thiamethyl)calix[4,6]arenes 3a and 4a have the highest extraction abilities. These extractants rapidly and completely extract palladium from hydrochloric acid solutions; regarding distribution factors achieved in the kinetic mode, they three to four orders of magnitude exceed their monodentate analogue, octylbenzyl sulfide (OBnS). Approaches are considered to enhance palladium extraction via generating mixed palladium species in low-acidity solutions and via intramolecular catalysis by the protonated oxygen atoms of alkoxy groups in the lower rim. For 1 M HCl, the kinetic order of diluent effects on palladium extraction was established. The substitution of sulfur atoms for bridging CH(2) groups was discovered to enhance palladium extraction by calix[4]arene thioether 3c.

引用

页码：1809 / 1815

页数：7

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