Mono-Disperse Triphenylene Discotic Liquid Crystal Oligomers Synthesized by Click Chemistry
Mono-Disperse Triphenylene Discotic Liquid Crystal Oligomers Synthesized by Click Chemistry
复制标题
点击化学合成单分散苯并菲盘状液晶低聚物
DOI：
10.2174/1385272811317080012
复制
发表时间：
2013-04-01
影响因子：
2.6
通讯作者：
Redshaw, Carl
中科院分区：
文献类型：
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作者：
Bai, Yue-Feng;Zhao, Ke-Qing;Redshaw, Carl
分散液晶作为一种新型的有机半导体材料，不仅具有自组织形成高度有序的柱状液晶相的能力，而且具有高的载流子迁移率和溶液加工特性。有机合成化学的发展和新的分子设计思想将导致液晶半导体的改进。在这份报告中，我们已经研究了CuI-Et 3 N催化的点击反应之间的末端炔和叠氮化物，两者都含有一个苯并菲部分。合成了一系列新型单分散的含1，4-二取代-1，2，3-三唑环的苯并菲双嵌段液晶低聚物。通过FT-IR、H-1和C-13 NMR、MALDI质谱等手段对其结构进行了表征。GPC结果证实了齐聚物的单分散性。通过热重分析（TGA）、偏光显微镜（POM）、差示扫描量热法（DSC）和X射线衍射（XRD）研究了它们的热稳定性和液晶性能。结果表明，所有齐聚物均为六方柱状中间相，为室温液晶。
Discotic liquid crystals, as new organic semiconductors, possess not only the ability to self-organize to a highly ordered columnar mesophase, but also possess high charged carrier mobility and solution processed characteristic. The progress of synthetic organic chemistry and new molecular designing ideas will result in improved discotic liquid crystalline semiconductors. In this report, we have investigated the CuI-Et3N catalyzed click reaction between terminal alkyne and azide, both of which contain a triphenylene moiety. Series new mono-dispersed triphenylene discotic liquid crystal oligomers containing the 1,4-disubstituted-1,2,3-triazole ring have been synthesized. Their structures have been fully characterized by FT-IR, H-1 and C-13 NMR spectroscopy, MALDI Mass spectrometry. The monodispersity of oligomers has been confirmed by the result of GPC. Their thermal stability and liquid crystalline properties have been studied by thermal gravimetric analysis (TGA), polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). The results demonstrated that all oligomers possessed the hexagonal columnar mesophase, and were room temperature liquid crystals.