Effects of symmetrically 2,5-disubstituted 1,3,4-oxadiazoles on the temperature range of liquid crystalline blue phases: a systematic study
Effects of symmetrically 2,5-disubstituted 1,3,4-oxadiazoles on the temperature range of liquid crystalline blue phases: a systematic study
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DOI：
10.1080/02678292.2012.749306
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发表时间：
2013-02
期刊：
影响因子：
2.2
通讯作者：
Ling Wang;Wanli He;Meng Wang;Mei-ju Wei;Jianzi Sun;Xingwu Chen;Huai Yang
中科院分区：
文献类型：
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作者：
Ling Wang;Wanli He;Meng Wang;Mei-ju Wei;Jianzi Sun;Xingwu Chen;Huai Yang
合成了四个系列的具有不同侧位取代基和末端烷氧基链长的对称性2，5-二取代1，3，4-恶二唑类化合物，并对其结构进行了表征。然后，将这些化合物分别掺杂到蓝相（BP）液晶基质中，研究了它们对BP液晶基质的BP范围的影响，结果表明，BP范围随2，5-二取代1，3，4-恶二唑的结构和掺杂浓度的不同而变化很大。此外，为了探讨“U”形分子的固有几何构型和性质对BPs稳定性的影响，采用密度泛函理论（DFT）对所有化合物的分子结构进行了研究，并在B3 LYP/6- 31 G * 水平上计算了分子的优化结构参数.
Four series of symmetrically 2,5-disubstituted 1,3,4-oxadiazoles with different lateral substituents and terminal alkoxy chain length were synthesised and characterised. Then, all these bent-shaped compounds were separately doped into the blue phase (BP) liquid crystal host and their effects on the BP range of the host were investigated, which shows that the BP ranges varied greatly with the difference in the structure of 2,5-disubstituted 1,3,4-oxadiazoles and their doped concentration. Moreover, in order to explore the influence of the inherent molecular geometry and properties of the bent-shaped molecules on the stability of BPs, the molecular structures of all the compounds were studied by using the theory of density functional theory, and the optimised structural parameters of the molecules were calculated at the B3LYP/6–31G* level.