Precise Structure Control of Stimuli Responsive Liquid Crystals with a Helical Mesogenic Core

我们发现，一个低聚（邻苯）（OP），其特征在于由一个圆柱形的螺旋几何形状，可以作为一个新的液晶元。作为掺杂剂的双相液晶（LC）OP也显示出与双相分子的高互溶性。令我们惊讶的是，在掺杂材料中，LC的2D六方晶格相对于玻璃基板完全垂直排列。此外，形成与OP类似结构的一些discriminal LC在室温下产生六方柱状LC相，其中2D六方晶格相对于各种基底完全垂直排列。我们注意到，离散分子表现出各向异性的瞬态微波电导率。

We found that an oligo(o-phenylene) (OP), characterized by a cylindrical helical geometry, can act as a novel mesogen. The nematic liquid crystalline (LC) OP as a dopant also shows a high miscibility with discotic molecules. To our surprise, in the doped material, the 2D hexagonal lattice of the LCs fully aligns homeotropically relative to a glass substrate. Furthermore, some discotic LCs forming similar structures to OP generate a hexagonal columnar LC phase at room temperature, where the 2D hexagonal lattice entirely aligns homeotropically relative to various substrates. We noticed that the discotic molecules show an anisotropic transient microwave conductivity.