Anion recognition as a method for templating pseudorotaxane formation

AUTOR(ES)

Wisner, James A.

FONTE

National Academy of Sciences

RESUMO

Two thread-shaped cations, pyridinium nicotinamide and imidazolium, as their chloride and hexafluorophosphate salts, were studied with regards to complexation with hydrogen-bond-donating acyclic and macrocyclic ligands. In the latter case, the cations form pseudorotaxanes templated by the chloride anion but not hexafluorophosphate. This formation is a function of the coupling of ion-pairing between the cation and chloride anion and subsequent recognition of the anion by the macrocyclic diamide, which provides the driving force for interpenetration. We propose that this anion template principle is a general method for the construction of pseudorotaxanes and could be applied to other cationic threads, anions, and macrocyclic species.

Documentos Relacionados

• Iris recognition as a biometric method after cataract surgery
• Metal ion recognition and molecular templating in self-assembled monolayers of cyclic and acyclic polyethers
• A Micro Method for Detecting Indol Formation
• Biomimetic macrocyclic receptors for carboxylate anion recognition based on C-linked peptidocalix[4]arenes
• Sensitivity of Agar Overlay Method for the Recognition of Enteroviruses