Synthesis and cation complexation of calix[4]azacrowns and a spirobiscalix[4]azacrown |
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Authors: | Abdelwaheb Hamdi Mohamed Habib Noomen Rym Abidi A Rim Woo Jeong Hwan Cho Yang Kim |
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Institution: | 1. Facult?? des Sciences de Bizerte, LACReSNE, 7021, Zarzouna, Bizerte, Tunisia 2. Department of Chemistry and Advanced Materials, Kosin University, 149-1, Dongsam-dong, Yeongdo-gu, Busan, 606-701, South Korea
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Abstract: | The synthesis and complexation properties of three new derivatives, one spirobiscalix4]azacrown (1) and two calix4]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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