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New p-tert-butyl thiacalix[4]arene derivatives containing simultaneously the 4-amidoazobenzene and ethoxycarbonyl fragments at the lower rim in cone and 1,3-alternate conformation of triand tetrasubstituted derivatives, correspondingly, were synthesized. It was shown that the replacement of the hydroxyl group by ethoxycarbonyl fragment in a 1,3-disubstituted macrocycle with 4-amidoazobenzene groups leads to the binding of fluorideand chloride-anions. The substitution of two hydroxyl groups by ethoxycarbonyl fragments dramatically changed the binding properties of tetrasubstituted p-tert-butyl thiacalix[4]arene derivative.

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Synthesis of Photo-Switchable Derivatives of p-tert-Butyl Thiacalix[4]arenes Containing Ethoxycarbonyl and 4-Amidoazobenzene Fragments in the Lower Rim Substituents