Ak Metin, Taban Deniz, Deligöz Hasalettin
Department of Chemistry, Faculty of Science-Arts, Pamukkale University, 20017 Denizli, Turkey.
J Hazard Mater. 2008 Jun 15;154(1-3):51-4. doi: 10.1016/j.jhazmat.2007.09.104. Epub 2007 Oct 2.
The molecule of azocalix[n]arene is a macrocyclic used effectively in the complexation of the heavy metal pollutants (like silver and mercury). In this work, our main aim is to prepare new chromogenic azocalix[n]arene molecules to elaborate an extractant with high extractant selectivity for metal ions able to detect this type of pollutant. The solvent extraction properties of four acetyls, four methyl ketones and four benzoyls derivatives from azocalix[4]arenes which were prepared by linking 4-ethyl, 4-n-butyl, 4-acetamid anilin and 2-aminothiazol to calix[4]arene through a diazo-coupling reaction, the alkaline earth (Sr2+) and the transition (Ag+, Hg2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Cr3+) metal cations have been determined by extraction studies with metal picrates. Both ketones are better extractants than esters, and show a strong preference for Ag+, while Cu2+ and Cr3+ are the most extracted cation with the esters. Both acetyl and benzoyl esters are good carriers for Ag+ and Hg2+.
偶氮杯[n]芳烃分子是一种大环化合物，可有效地用于重金属污染物（如银和汞）的络合。在这项工作中，我们的主要目标是制备新的显色偶氮杯[n]芳烃分子，以精心研制一种对能够检测此类污染物的金属离子具有高萃取选择性的萃取剂。通过重氮偶合反应将4-乙基、4-正丁基、4-乙酰氨基苯胺和2-氨基噻唑连接到杯[4]芳烃上制备的四种乙酰基、四种甲基酮和四种苯甲酰基偶氮杯[4]芳烃衍生物的溶剂萃取性能，通过用金属苦味酸盐进行萃取研究，测定了碱土金属（Sr2+）和过渡金属（Ag+、Hg2+、Co2+、Ni2+、Cu2+、Zn2+、Cd2+、Cr3+）阳离子。两种酮都是比酯更好的萃取剂，并且对Ag+表现出强烈的偏好，而Cu2+和Cr3+是酯萃取最多的阳离子。乙酰基酯和苯甲酰基酯都是Ag+和Hg2+的良好载体。
