Elçin Serkan, Çılgı Gülbanu Koyundereli, Bayrakdar Alpaslan, Deligöz Hasalettin
Department of Chemistry Engineering, Faculty of Engineering, Pamukkale University, 20017 Denizli, Turkey.
Materials Science and Engineering Department Technology Faculty, Pamukkale University, 20017 Denizli, Turkey.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 May 5;142:178-87. doi: 10.1016/j.saa.2015.01.087. Epub 2015 Feb 7.
In the present study, azocalix[4]arenes were prepared by linking 4-methoxy, 4-methyl, 4-ethyl, 4-chloro, 4-bromo and 4-nitroaniline to calix[4]arene through a diazo-coupling reaction. A new family of azocalix[4]arene tetraester derivatives, (4a-f), have been prepared with the incorporation of ethyl ester units to azocalix[4]arene. Characterization of the synthesized azocalix[4]arenes was carried using elemental analyses, UV-vis, FT-IR and (1)H NMR spectroscopic techniques. The effect of varying pH levels and solvent types on the absorption ability of azocalix[n]arenes substituted with electron-donating and electron-withdrawing groups was examined. Thermal decomposition of azocalix[4]arene derivatives (4a-f) was investigated by means of thermogravimetry (TG), differential thermogravimetry (DTG) and differential thermal analysis (DTA) analyses. In conclusion of the examination of the extraction we found a selectivity characteristic of these compounds toward Ag(+), Hg(+) and Hg(2+) cations.
在本研究中，通过重氮偶联反应将4-甲氧基、4-甲基、4-乙基、4-氯、4-溴和4-硝基苯胺与杯[4]芳烃相连制备了偶氮杯[4]芳烃。通过将乙酯单元引入偶氮杯[4]芳烃，制备了一个新的偶氮杯[4]芳烃四酯衍生物家族（4a - f）。使用元素分析、紫外可见光谱、傅里叶变换红外光谱和¹H核磁共振光谱技术对合成的偶氮杯[4]芳烃进行了表征。研究了不同pH值水平和溶剂类型对偶氮杯[n]芳烃（带有供电子和吸电子基团）吸收能力的影响。通过热重分析（TG）、微商热重分析（DTG）和差示热分析（DTA）分析研究了偶氮杯[4]芳烃衍生物（4a - f）的热分解。在萃取研究的结论中，我们发现这些化合物对Ag⁺、Hg⁺和Hg²⁺阳离子具有选择性特征。
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