A flexible capsule has been designed in which the anion-binding preorganisation is enhanced by a urea 'zipper'. © The Royal Society of Chemistry.
Turner, D. R., Paterson, M. J., & Steed, J. W. (2008). Conformational control by 'zipping-up' an anion-binding unimolecular capsule. Chemical Communications, (12), 1395-1397. https://doi.org/10.1039/b800339d