δ-Methyl Branching in the Side Chain Makes the Difference: Access to Room-Temperature Discotics
作者:Jochen Kirres、Friederike Knecht、Philipp Seubert、Angelika Baro、Sabine Laschat
DOI:10.1002/cphc.201501166
日期:2016.4.18
Although discotic liquid crystals are attractive functional materials, their use in electronic devices is often restricted by high melting and clearing points. Among the promising candidates for applications are [15]crown‐5 ether‐based liquid crystals with peripheral n‐alkoxy side chains, which, however, still have melting points above room temperature. To overcome this problem, a series of o‐terphenyl
尽管盘状液晶是有吸引力的功能材料,但是它们在电子设备中的使用常常受到高熔点和透明点的限制。在应用中很有希望的候选物是具有外围正烷氧基侧链的[15]皇冠5醚基液晶,但是其熔点仍高于室温。为了克服这个问题,制备了一系列邻-叔苯基和三亚苯基[15] crown-5醚衍生物,其中不同长度的δ-甲基支链烷氧基侧链取代了周边的线性烷氧基链。通过差示扫描量热法,偏光光学显微镜和X射线衍射研究了新型冠醚的介晶性质。