作者:Yuki Arakawa、Kenta Komatsu、Hideto Tsuji
DOI:10.1039/c8nj06456c
日期:——
linkage, containing odd carbon numbers n = 3, 5, 7, 9, and 11, and also synthesized even-n members n = 6 for each system. Both CBSnSCB with n = 3, 5 and 7 and CBSnOCB with n = 5 and 7 formed a broad range of twist-bend nematic (NTB) phases that were stable down to room temperature and showed remarkably enhanced glass-forming ability. In addition, CBS9OCB also formed NTB phase at a fast scan rate. DFT
我们开发了基于具有硫醚或硫键的氰基联苯二聚体的弯曲弯曲线虫,与通常使用的亚甲基和醚键相反。基于硫醚C–C的键角小于亚甲基C–CH 2 – C和醚C– OC的键角,我们设计了两个二聚体同源系列,它们是更弯曲的,对称的CBS n SCB,具有两个硫醚键和非对称键具有硫醚和醚键的CBS n OCB,包含奇数碳原子数n = 3、5、7、9和11,并且每个系统还合成了偶数n个成员n = 6。既CBS Ñ SCB与Ñ = 3,5和7和CBS Ñ OCB与Ñ= 5和7形成了各种各样的扭曲弯曲向列相(N TB),这些相在室温下稳定,并显着增强了玻璃形成能力。此外,CBS9OCB还以快速扫描速率形成了N TB相。DFT计算显示,与常规的由杀线虫剂醚连接的CBO7OCB相比,扭曲弯曲的线虫产生剂CBS7SCB和CBS7OCB具有由两个氰基联苯部分的对位轴构成的较小的弯曲角和较大的偶极矩。