A series of new p-tert-butylcalixarene-based dipodal receptors are synthesised in high yields. The calixarene units of all the receptors have been found to be present in cone conformation. To optimise the good extraction ability and high transport rate, we synthesised the receptors that differ from each other in their end groups. These receptors extract Cu2+ ion selectively from the buffered aqueous medium containing a mixture of metal ions. The receptor bearing four sp3 nitrogens has by far the greater ability to extract Cu2+ than the other receptors. All these receptors were effectively used for Cu2+ ion transport from the aqueous buffered source phase to the aqueous receiving phase.
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