Synthesis and characterization of azocalix[4]arene ester and ketone derivatives incorporated in a polymeric backbone with bisphenol-A and their cation-binding properties |
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Authors: | Mukaddes Meryem Tun? ?zlem ?zen Karaku? Hasalettin Delig?z |
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Institution: | 1. Department of Chemistry, Faculty of Science, Pamukkale University, 20017, Denizli, Turkey
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Abstract: | This study comprises synthesis and characterization of azocalix4]arene compounds having copolymeric structures. The novel bisazocalixphenol-A and copolymer containing pendant azocalix4]arene units with ester (5) and ketone (6) functionalities at their lower rim have been synthesized via diazo-coupling reaction. The phase transfer study is performed by liquid?Cliquid extraction method. It has been deduced from the observations that their precursors 25,26,27-tribenzoyloxy-28-hydroxy-5-(4-aminophenylazo)calix4] arene (3), 25,27-diacetoniloxy-26,28-dihydroxy-5,17-(4-aminophenylazo)calix4]arene (4) and bisazocalixphenol-A (5) show a good phase transfer affinity towards selected transition metal cations, unlike copolymer (6). These compounds are studied by the selective extraction of Fe3+ cation from the aqueous phase into the organic phase and it is carried out using compounds 1?C6. It is observed that the reduced azocalix4]arene 4 is the most efficient (82.93?%) carrier of all compounds (3?C6) in the extraction of Fe3+ at pH 5.4. |
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