Huang Ningdong, Tao Jiaojiao, Wei Shenghui, Huang Weiheng, Wang Daoliang
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China.
ACS Omega. 2020 Apr 24;5(17):9937-9943. doi: 10.1021/acsomega.0c00229. eCollection 2020 May 5.
Positional order in the lyotropic chromonic liquid crystals (LCLCs) is investigated in the supramolecular assembly of benzene 1,3,5-tricarboxamide (BTA) derivatives with the glucono-delta-lactone (GdL) acid additive by high-resolution synchrotron radiation small-angle X-ray scattering. The formation of positionally ordered hexagonal phase is found to profoundly depend on the concentrations of BTA derivatives, , and GdL additives, , giving rise to unusual behavior distinctive from conventional lyotropic liquid crystals (LCs) with covalent bonds and fixed length. The hexagonal phase is observed to coexist with another phase in certain range of / . Intriguingly, the lattice spacing of the hexagonal phase remains almost constant by varying but changes with . The above observations are attributed to unique sensitivities of the LCLC properties, such as the contour length and flexibility of individual cylinder assemblies and phase coexistence, to additives in the solutions. Our study reveals the complexity in positional ordering in the LCLCs which not only relates to the underlying principles of hierarchical reversible self-assembly but also attracts fundamental interests in LCs.
通过高分辨率同步辐射小角X射线散射研究了苯-1,3,5-三甲酰胺（BTA）衍生物与葡萄糖酸-δ-内酯（GdL）酸添加剂在超分子组装体中的溶致变色液晶（LCLC）中的位置有序性。发现位置有序六方相的形成深刻依赖于BTA衍生物的浓度 和GdL添加剂的浓度 ，产生了与具有共价键和固定长度的传统溶致液晶（LC）不同的异常行为。在 / 的特定范围内观察到六方相与另一相共存。有趣的是，六方相的晶格间距 通过改变 几乎保持不变，但随 而变化。上述观察结果归因于LCLC性质（如单个圆柱组装体的轮廓长度和柔韧性以及相共存）对溶液中添加剂的独特敏感性。我们的研究揭示了LCLC中位置有序性的复杂性，这不仅与分层可逆自组装的基本原理有关，也引起了对LC的基本兴趣。
