The Ultrafast Assembly of a Dipeptide Supramolecular Organogel and its Phase Transition from Gel to Crystal

A gel‐to‐crystal phase transition of a dipeptide supramolecular assembly mediates active water transportation in oils. The addition of water into ultrafast‐assembling dipeptide organogels can induce a lamellar‐to‐hexagonal structural transformation of dipeptide molecular arrangement. Consequently, a phase transition from gel to crystal occurs and in turn water is transported in the dipeptide crystal via well‐defined channels. On a macroscopic scale, water transport in the bulk system exhibits an anisotropic characteristic, which can be tuned by the presence of ions in the Hofmeister series. These favorable features enable the automatic separation of dispersed nanoparticles from dissolved electrolytes in aqueous solution. These findings demonstrate the potential of this assembled system for active filtration without external pressure. A gel‐to‐crystal phase transition of a dipeptide supramolecular assembly creates well‐defined channels to direct water transportation through immiscible oils. This system holds great potential for the purification or concentration of dispersed particles in aqueous solution.