Karunakaran et al., Exquisite regulation of supramolecular equilibrium polymers in water: chain stoppers control length, polydispersity and viscoelasticity, Polym. Chem., 2018,9, 5268-5277,
From the Table of Contents: Positively charged molecules with planar surfaces control the length of supramolecular polymers formed by 2,4,6-triaminopyrimidine and a modified cyanuric acid.