Mixed substrate supermolecules: binding of organic substrates and of metal ions to heterotopic coreceptors containing porphyrin subunits

Abstract

The macroteracyclic and macropentacyclic compounds (1)–(3), which combine porphyrin rings and [18]-N₂O₄aza-oxamacrocycles as substrate selective binding subunits, complex diammonium ions ⁺H₃N–[CH₂]_n–NH₃+(anchored to the [18]-N₂O₄sites and included in the central molecular cavity) and /or Zn^IIions (bound to the porphyrin groups), thus yielding organic/inorganic mixed substrate supramolecular structures.