Abstract
The synthesis and complexation properties of three new derivatives, one spirobiscalix[4]azacrown (1) and two calix[4]azacrown (2 and 3), are reported. Complexation studies of the three ligands toward transition and heavy metal cations have been carried out and monitored by UV absorption spectrophotometry in acetonitrile. Mononuclear complexes were detected for all complexes, whereas binuclear species (M2L) were also formed in the case of ligand 1 with Cu2+ and Pb2+. The extraction properties of 1, 2 and 3 toward Cu2+, Zn2+, Pb2+, Ag2+ and Cd2+ are also reported. The results showed that complexation is the main factor affecting extraction with ligands 2 and 3, while with ligand 1 it is not.
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This research was supported by the National Research Foundation of Korea (Grant 2010-00275) and Kosin University (2010).
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Dedicated to Professor Leonard F. Lindoy, a great chemist, on the occasion of his 75th birthday.
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Hamdi, A., Noomen, M.H., Abidi, R. et al. Synthesis and cation complexation of calix[4]azacrowns and a spirobiscalix[4]azacrown. J Incl Phenom Macrocycl Chem 71, 287–291 (2011). https://doi.org/10.1007/s10847-011-0029-0
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DOI: https://doi.org/10.1007/s10847-011-0029-0