| 초록 |
Here we report the spontaneous formation of switchable sheets in aqueous solution, which is based on bentshaped aromatic amphiphiles containing m-pyridine units at the terminals with a hydrophilic dendron at its apex. The aromatic segments self-assemble into flat sheets consisting of a zig-zag conformation through π-π stacking interactions. Notably, the sheets reversibly transform into helical tubules at a higher concentration, while transforming into discrete dimeric macrocycles at a lower concentration in response to Ag(I) ions through reversible coordination interactions between the pyridine units of the aromatic segments and Ag(I) ions. While maintaining the coordination bonding interactions, the helical tubules reversibly transform into the dimeric macrocycles in response to the variation in concentration. |
