文章基本信息

标题：Azocalixarene. 5: p-Substituted Azocalix4arenes as Extractants for Dichromate Anions
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作者：Hasalettin Deligˆz ; Mine Sulak Ak ; Shahabuddin Memon 等
期刊名称：Pakistan Journal of Analytical & Environmental Chemistry
印刷版ISSN：1996-918X
电子版ISSN：2221-5255
出版年度：2008
卷号：9
期号：1
页码：1-5
语种：English
出版社：National Centre of Excellence in Analytical Chemsitry
摘要：In this article,chromium(VI) extraction properties of two azocalix4arene based receptors (L4 and L6) are reported. A preliminary evaluation of the binding efficiencies of p-substituted azocalix4arene derivatives L4 and L6 was carried out by solvent extraction of Na-dichromate from aqueous solution into dichloromethane at different pH. It was observed that the new compounds are effective extractants for transferring the HCr2O7 -/Cr2O7 2- anions at low pH. The binding ability of these compounds toward HCr2O7 -/Cr2O7 2- anions depends upon Na + extraction..
关键词：Calix4arene;azocalixarene;extractants;dichromate anions;phase transfer