Institute of Chemistry, Martin-Luther University Halle-Wittenberg, Kurt-Mothes Str. 2, D-06120 Halle/Saale, Germany.
Soft Matter. 2017 Jun 21;13(24):4381-4392. doi: 10.1039/c7sm00793k.
A sequence of liquid crystalline phases, involving cybotactic nematics, a lamellar phase, bicontinuous cubics and triangular honeycombs, was observed for oligo(phenylene ethynylene) based X-shaped bolapolyphiles with two long lateral alkyl chains and sticky ends provided by glycerol groups. In the cubic phase with Ia3[combining macron]d lattice - which is tailored by alkyl chain engineering - the aromatic cores are organized on the gyroid minimal surface in 3D curved layers of almost parallel aligned π-conjugated rods. It is shown that this type of cubic phase is a general mode of soft self-assembly of X-shaped bolapolyphiles at the cross-over from the (long or short range) lamellar to the triangular honeycomb-like organization. Cubic phase formation is found only in a narrow range with respect to temperature and chain-length for the non-fluorinated compounds and in much wider ranges for related core-fluorinated molecules.
观察到具有两个长侧链和由甘油基团提供的粘性末端的基于寡（苯乙炔）的 X 型双大环聚电解质的一系列液晶相，包括胶束向列相、层状相、双连续立方相和三角蜂窝相。在立方相中，具有 Ia3[combining macron]d 晶格 - 通过烷基链工程定制 - 芳环核在 3D 弯曲层中以几乎平行排列的π共轭棒的形式组织在 gyroid 最小表面上。结果表明，这种立方相是 X 型双大环聚电解质从（长程或短程）层状到三角蜂窝状组织的交叉处的软自组装的一般模式。在非氟化化合物中，立方相形成仅在温度和链长方面存在窄范围，而对于相关的核氟化分子，其存在范围要宽得多。
