- 黃哲鋼 教授
- 中山大學化學學院
- 網址: huangzhegang.polymer.cn 訪問量:189949
關鍵字:dumbbell-shaped aromatic amphiphile,molecular assembly,supramolecular chirality
論文來源:期刊
具體來源:The Journal of Physical Chemistry C
發表時間:2014年
Despite recent advances in synthetic nanometer-scale helical assembly,control of supramolecular chirality remains a challenge. Here, we describe the finetuning of the shape and morphology transitions of twisted and helical assembly from dumbbell-shaped rigid-flexible amphiphile triggered by concentration. The amphiphile 2 self-assembles into nonchiral 3D columnar crystals with alternative packing of aromatic segment in solid state. Remarkably, with the addition of water into the solid, the achiral crystal transforms into 2D hexagonally ordered liquid crystal gel with supramolecular chirality due to increased entropy of flexible coil in aqueous environment.Notably, the helical liquid crystal gel was observed to dissolve into optically active aqueous nanofibers caused by a conformational change of hydrophobic aromatic rods and enhanced hydro-volume of the ethylene oxide chains.