Abstract
Formation of novel lower rim derivatives of p-tert-butylthiacalix[4]arene through direct reflux between p-tert-butylthiacalix[4]arene tetrahydrazides (cone, partial cone and 1,3-alternate conformers) and N-methylisatin in absolute ethanol. The study is clearly showed a facile synthesis of di- and tetrasubstituted p-tert-butylthiacalix[4]arene derivatives (2, 3 and 4) with excellent yields (up to 95%). The novel products were investigated by using the state-of-the-art techniques such as FT-IR, 1H-NMR and 13C-NMR spectroscopies. Moreover, the potential applications of these derivatives were screened for their ability to detect and remove alkali and transition metals (Li+, Na+, K+, Cs+, Pb2+, Cd2+, Hg2+, Ni2+, Co2+, Cu2+, Ag+) using the liquid–liquid extraction method with promising results.
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