Synthesis and comparison of extraction properties of p-tert-butylcalix[n]arene nitrile derivatives for selected metals and dichromate anions

被引：3
|
作者：
Kocak, Ahmet [1 ]
Ceran, Saadet [1 ]
Memon, Shahabuddin [2 ]
Yilmaz, Mustafa [1 ]
机构：
[1] Selcuk Univ, Dept Chem, Fac Arts & Sci, TR-42075 Konya, Turkey
[2] Univ Sindh, Natl Ctr Excellence Anal Chem, Jamshoro, Pakistan
来源：
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY | 2008年 / 45卷 / 06期
关键词：
calixarenes; toxicity; transition metal ions; dichromate anion; selectivity; liquid-liquid extraction;
D O I：
10.1080/10601320801977657
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The article describes the syntheses and extraction properties of two p-tert-butylcalix[6]arene nitrile derivatives (3 and 4). The trinitrile derivative 3 has been synthesized from 5,11,17,23,29,35-hexa-tert-butyl-37,38,39,40,41,42-hexahydroxy-calix[6]arene 1. The compound 1 was directly converted to its hexanitrile derivative (4). In these syntheses, it was considered to explore the role of nitrile sites in the extraction of various metal cations and HCr2O7-/Cr2O72- anions. The liquid-liquid extraction properties of 3 and 4 towards selected alkali/transition metal cations and HCr2O7-/Cr2O72- anions are reported. It has been observed that receptor 3 does not extract alkali/transition metal cations effectively, but shows affinity towards HCr2O7-/Cr2O72- anions at low pH. The compound 4 is an effective form for transferring Ni2+ selectively, while it shows poor transferring ability for HCr2O7-/Cr2O72- anions from an aqueous into a dichloromethane layer. It was observed that the cavity size of the calix[n]arenes and the cooperativity of the functionalities play important roles in two phase extraction systems.
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收藏
页码：440 / 444
页数：5
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