Abstract
A novel calix[4]arene derivative (5,11,17,23-tetra- tert-butyl-25,27-bis(3-pyridinecarboxylate)-26,28-dihydroxycalix[4]arene) ( 1), bearing two nicotinic moieties, has been synthesized by a convenient method in 40% yield. The liquid membrane transport and the silver selective electrode based on calix[4]arene derivative ( 1) show excellent cation selectivities for Ag + and Hg 2+ over other alkali and alkaline earth, transition metal ions, and ammonium ion. The higher cation selectivity is mainly attributed to that the host–guest interaction which occurs between the cations and the derivative calix[4]arene ( 1) is determined by the functional groups which act as binding sites.
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