Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
National Anti-counterfeit Engineering Research Center, Huazhong University of Science and Technology, Wuhan, 430074, China.
Macromol Rapid Commun. 2022 Sep;43(18):e2200154. doi: 10.1002/marc.202200154. Epub 2022 May 15.
The construction of aggregation-induced emission-active (AIE-active) gelators with liquid crystal properties remains a challenge. Moreover, the effects of AIE configuration on liquid crystal, gel and AIE behaviors in one system are unclear. Herein, two main-chain liquid crystalline copolyester gelators with a single configuration of AIEgen TPE, mesogen biphenyl, and pendent amide groups are synthesized through melt polycondensation. Both copolyesters display smectic phase, while E-P20 possesses a wider temperature range of liquid crystal and a narrower layer distance owing to the more serious nonlinear "defect" of Z-TPE than E-TPE units. In addition, E-P20 and Z-P20 can form AIE-active gels with the minimum gelation concentration (MGC) values of 10 and 4 wt% in ethyl acetate mainly via hydrogen bonds between the pendent amide groups, respectively. These AIE-active gels show potential applications in temperature sensor, information storage, and so on.
具有聚集诱导发光（AIE）活性的凝胶因子的构建仍然具有挑战性。此外，AIE 构象对同一体系中液晶、凝胶和 AIE 行为的影响尚不清楚。本文通过熔融缩聚合成了两种主链液晶共聚酯凝胶因子，它们具有单一的 AIEgen TPE、介晶双苯和侧挂酰胺基团的构型。两种共聚酯均显示出近晶相，而 E-P20 由于 Z-TPE 单元比 E-TPE 单元具有更严重的非线性“缺陷”，因此具有更宽的液晶温度范围和更窄的层间距。此外，E-P20 和 Z-P20 可以在乙基 acetate 中形成 AIE 活性凝胶，其最低凝胶浓度（MGC）值分别为 10 和 4wt%，主要是通过侧挂酰胺基团之间的氢键。这些 AIE 活性凝胶在温度传感器、信息存储等方面具有潜在的应用。
