Fig. 3. Structural switching upon ligand reaction. ¹H NMR spectra (400 MHz, CD₃CN, 298 K) of (a) aggregate 3; (b) 3 + AgClO₄ + H₂O, air, 45 °C, 12 h; (c) 3 + AgClO₄ + H₂O, air, 45 °C, 20 h; (d) suberone helicate 1; (e) suberol helicate 2; (f) 3 + AgClO₄ + H₂O, N₂, 80 °C, 60 h; (g) 3 + AgClO₄ + H₂O, N₂, 80 °C, 36 h; (h) aggregate 3.