Fig. 3: Assembly mechanism of G and PBB mixtures.

a, d 11B NMR spectra and XRD patterns. b, e Variable-temperature 11B NMR spectra of G-PBB-pHaq.13 and G-PBB-pHaq.1 hydrogels. c, f 1H NMR spectra of free G, PBB and G-PBB hydrogels under both acidic and alkaline conditions. g, h Assembly mechanism of G and PBB mixtures under acidic (g) and alkaline (h) conditions (Supplementary Movie 1). Atoms are colored as follows: red - oxygen, blue - nitrogen, gray - carbon, pink - boron, white - hydrogen, and purple - potassium.