hydrogen-bonding guest. A chiral auxiliary group on the amide nitrogen acted as a chiral handle to control the helical-sense preference of dynamic helical forms of the loop. The helical-sense preference is brought about by an intramolecular transmission of point chirality associated with the loop. The preferred sense was switched upon complexation with an achiral additive through the formation of hydrogen bonds. In
                                    我们展示了具有简单分子的按摩疗法切换系统。该分子包含一对与二炔键连接的
二苯基乙炔发色团,并安排以螺旋折叠形式与(M)-或(P)-螺旋。叔酰胺基团连接到环状分子的每个末端。酰胺羰基用于捕获对位氢键的客体。酰胺氮上的手性辅助基团充当手性手柄,以控制环的动态螺旋形式的螺旋感官偏好。螺旋感觉偏好是由与环相关的点手性的分子内传递引起的。当通过与非手性添加剂形成氢键络合时,优选的含义发生了变化。在两种状态下,在络合之前和之后,螺旋感官偏好都通过单一手性来源的双向传递来控制。