Fig. 9

Cyclic voltammetry (CV) studies of 5⁴⁺. Second scans of the CVs for the dumbbell 8 (black trace), the [2]rotaxane 5⁴⁺•4PF₆^─ (red trace), and CBPQT⁴⁺•4PF₆^─ (blue trace). All the CVs were recorded under the same conditions of temperature (25 °C), solvent (argon-purged MeCN), concentrations (1 mM), and tetrabutylammonium hexafluorophosphate electrolyte (0.1 M TBA⁺•4PF₆^─). The scan rate was set at 200 mV s^─1