Fig. 6: Partial 1H NMR spectra and equilibrium constant of macrocycles.

a Partial stacked 1H NMR spectra (400 MHz, 298 K) of DPA[3] (left) and DPA[4] (right) from 0.1 mM to 10 mM in CDCl3. b Step aggregation of macrocycles and equilibrium constant of DPA[3] and DPA[4].