Switching a molecular shuttle on and off: simple, pH-controlled pseudorotaxanes based on cucurbit[7]uril.
Cucurbit[7[uril, the wheel component in two new and structurally simple pseudorotaxanes, shuttles between the two axle termini at low pH, whereas the shuttling motion stops at higher pH, as the wheel is bound to the center of the axle.
Sindelar
Vladimir
V
Center for Supramolecular Science and Department of Chemistry, University of Miami, Coral Gables, Florida 33124-0431, USA.
Silvi
Serena
S
Kaifer
Angel E
AE