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Selective uptake: Pillar[5]‐bis‐crown shows the dimetalation via two crown subunits and then uptakes CN(CH2)2CN selectively over analogous dinitrile guests with different lengths. This is a chemical example of the adaptive guest binding of biological receptors which are rigidified by metalation to recognise substrates precisely. This work also demonstrates a new perspective on metallosupramolecules...
Some biological receptors change their shapes and rigidity by metalation to recognize substrates precisely via adaptive guest binding process. Herein we present a semi‐flexible tricyclic host molecule whose conformation is rigidified by dimetalation to uptake organic guests selectively. Considering two metal binding sites and an empty space between them, pillar[5]‐bis‐thiacrown (L) was synthesized...
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