作者:Joanna Matraszek、Neha Topnani、Natasa Vaupotič、Hideo Takezoe、Jozef Mieczkowski、Damian Pociecha、Ewa Gorecka
DOI:10.1002/anie.201510123
日期:2016.3.1
exhibiting lamellar crystals (B4 phase), when dissolved in organic solvents, formed gels with helical ribbons made of molecular monolayers and bilayers, whereas strongly deformed stacks of 5–6 layers were found in the bulk samples. The width and pitch of the helical filaments were governed by molecular length; they both increased with terminal‐chain elongation. It was also found that bulk samples were
当弯曲的核心材料呈现出层状晶体(B4相)时,当溶解于有机溶剂中时,形成的凝胶带有由分子单层和双层构成的螺旋带,而在大量样品中发现了5–6层的强烈变形叠层。螺旋丝的宽度和节距受分子长度的控制。它们都随着末端链的延长而增加。还发现,与缺乏光学活性的相应凝胶相比,大块样品具有光学活性。样品的光学活性源自晶体层的内部结构,而不是源自细丝的螺旋度。理论模型预测,随着堆栈中层数的增加以及几层的饱和度,光学活动将大大增加,因此,可以解释凝胶的光学活性要比散装样品的光学活性小。与溶胶状态相比,在凝胶中检测到荧光的强烈增加和红移。