Fig. 13.a. 1H-NMR spectra of b-POBP-x in DMSO-d6; b. OH- conductivity of b-POBP-x ISMs as a function of temperature and degrees of branching in 6 mol·L-1 KOH aqueous solution. Reproduced with permission of Ref. [66]. Copyright 2025, Chem Catalysis. c. Tetrazolation of SAN and formation of corresponding potassium tetrazolide following equilibration in aqueous KOH. Reproduced with permission of Ref. [67]. Copyright 2024, Royal Society of Chemistry.