Fig. 3: 1H NMR cation titration of 9·ChB4.
From: Amphoteric chalcogen-bonding and halogen-bonding rotaxanes for anion or cation recognition
a, Truncated 1H NMR titration spectra of 9·ChB4 upon addition of 0.2, 0.4, 0.6, 0.8 and 1.0 equivalents of AgPF6. b, Binding isotherms showing changes in chemical shift of proton a with increasing equivalents of metal cation. The filled dots represent the experimental data, the solid lines show the calculated isotherms and the dashed lines are a visual aid ([9·ChB4] = 1.0 mM, 500 MHz, 298 K, CD3CN).
