Guest-length driven high fidelity self-sorting in supramolecular capsule formation of calix[5]arenes in water†
Ilenia
Pisagatti, 
a
Giuseppe
Gattuso,
a
Melchiorre F.
Parisi,
a
Silvano
Geremia,
b
Neal
Hickey
b
and
Anna
Notti
*a
a
Giuseppe
Gattuso,
a
Melchiorre F.
Parisi,
a
Silvano
Geremia,
b
Neal
Hickey
b
and
Anna
Notti
*a
Abstract
A four component system consisting of two water-soluble calix[5]arenes (1 and 2) with differently substituted upper-rims and two α,ω-alkanediyldiammonium ions of different lengths (NC8N and NC10N) was found to assemble in a high-fidelity fashion providing exclusively the two homocalixarene capsules 1⊃NC8N⊂1 and 2⊃NC10N⊂2, irrespective of the order of guest addition. When the longer linker (NC10N) was left out from the mixture altogether, however, 1⊃NC8N⊂2 heterocapsules were formed.
![Graphical abstract: Guest-length driven high fidelity self-sorting in supramolecular capsule formation of calix[5]arenes in water](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C9QO01188A&imageInfo.ImageIdentifier.Year=2019)
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