Synthesis and characterization of three novel azocalix[4]arene Schiff base derivatives and their selective copper extraction |
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Authors: | ?zlem ?zen Karaku? Hasalettin Delig?z |
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Institution: | 1. Department of Chemistry, Faculty of Science-Arts, Pamukkale University, 20017, Denizli, Turkey
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Abstract: | The synthesis and characterization of three novel Schiff bases of azocalix4]arene and their selective copper extraction are described. The preparation of azocalix4]arenes (1c, 2c and 3c) has been achieved by the condensation of 2-hydroxy-3-methoxybenzaldehyde with the amine group of upper rim mono-, di- and tetra-(aminophenylazo) calix4]arene in ethanol. The synthesized products (1c, 2c and 3c) are characterized by both 1H and 13C NMR techniques, IR spectroscopy and elemental analysis. Extraction capabilities of interested derivatives of azocalix4]arene from aqueous phase into organic phase are also examined. While extraction of Ag+, Hg+ and Hg2+ cations gave strong complexes with azo groups, extraction of Cu2+ cation is found to be highly effective with ?CCH=N?C and neighboring ?COH groups. |
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