Di-substituted azocalix[4]arenes containing chromogenic groups: synthesis, characterization, extraction, and thermal behavior
作者:Serkan Elçin、Hasalettin Deligöz
DOI:10.1016/j.tet.2013.06.018
日期:2013.8
In this study, the synthesis of chromogenic di-substituted azocalix[4]arene derivatives is described. Six novel azocalix[4]arenes (4a–f)were prepared by linking 4-methoxy, 4-methyl, 4-ethyl, 4-chloro, 4-bromo, and 4-nitroaniline to 25,26,27,28-tetrahydroxy-11,23-di-(tert-butyl)calix[4]arene through a diazo-coupling reaction, and were characterized by elemental analysis, FTIR, 1H NMR spectra and thermogravimetric
在这项研究中,描述了生色二取代的偶氮杯[4]芳烃衍生物的合成。通过将4-甲氧基,4-甲基,4-乙基,4-氯,4-溴和4-硝基苯胺连接到25,26,27,28-四羟基制备了六种新颖的偶氮杯[4]芳烃(4a – f)通过重氮偶合反应得到-11,23-二叔丁基杯芳烃[4]芳烃,并用元素分析,FTIR,1 H NMR光谱和热重分析(TGA)进行了表征。通过液-液萃取某些金属阳离子(Sr 2 +,Ag +,Hg +,Hg 2 +,Co 2 +,Ni 2 +,Cu2+,Pb 2 +,Cr 3+,Al 3+)。已经观察到,二取代的偶氮杯[4]芳烃对Ag +,Hg +和Hg 2+离子具有很高的亲和力,但对其他金属几乎没有亲和力。比较了这些azocalix [4]芳烃的颜色,以了解不同pH值对吸收能力的影响。还通过热重分析(TG)和热分析(DTA)报告了这些化合物的热行为。