Fig. 4: 1H NMR spectra of host–guest complex.

Top: 2.0 mM G5; Middle: 1:2 mixture of 1.0 mM R-C[4]B and 2.0 mM G5; Bottom: 1.0 mM R-C[4]B. (400 MHz, D2O, 298 K).

Top: 2.0 mM G5; Middle: 1:2 mixture of 1.0 mM R-C[4]B and 2.0 mM G5; Bottom: 1.0 mM R-C[4]B. (400 MHz, D2O, 298 K).