Synthesis and binding studies of novel thiacalixpodands and bisthiacalixarenes having O,O″-dialkylated thiacalix[4]arene unit(s) of 1,3-alternate conformation |
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Authors: | Vandana Bhalla Manoj Kumar Tetsutaro Hattori Sotaro Miyano |
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Institution: | a Department of Chemistry, Guru Nanak Dev University, Amritsar 143 005, India b Department of Environmental Studies, Graduate School of Environmental Studies, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan |
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Abstract: | A series of thiacalixpodands and bisthiacalixarenes with imine units have been prepared by condensation of O,O″-bis(2-aminoethyl)-O′,O?-dipropyl-p-tert-butylthiacalix4]arene of 1,3-alternate conformation with different aromatic (di)aldehydes. The molecules derived from pyridine-2-carbaldehyde and -2,6-dicarbaldehyde quantitatively extract silver ion from aqueous into organic phase with complete selectivity over other metal ions (Na+, K+ and Cs+) under neutral conditions. The former compound forms a 1:2 (L:M) complex with silver ion as proved by NMR spectroscopy, Job’s plot and X-ray crystallography. |
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Keywords: | Calixpodand Bisthiacalixarene Complexation Solvent extraction |
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