Metal directed assembly of ditopic containers and their complexes with alkylammonium salts

Cavitands with mobile walls

Deep cavitands having three fixed walls and one mobile wall were prepared. The longer wall, built from a quinoxaline spacer, showed enhanced NMR spectra of guests, but the shorter wall based on a benzene spacer showed tighter binding and slower exchange of guests.

Pseudo-capsule assemblies characterized by 19F NMR techniques

The formation of capsule-like dynamic assemblies which do not rely on attractions between host subunits was achieved via specific interactions with fluorinated guests. Characterization of these three component assemblies was accomplished by applications of (19)F NMR spectroscopy.