Banana-shaped dopants for flexoelectric nematic mixtures
Banana-shaped dopants for flexoelectric nematic mixtures
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DOI：
10.1080/02678290802522114
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发表时间：
2008-01-01
期刊：
影响因子：
2.2
通讯作者：
Goulding, Mark
中科院分区：
文献类型：
--
作者：
Aziz, Nayar;Kelly, Stephen M.;Goulding, Mark
报道了新型间位取代季苯及其相关二聚体的合成，并将其作为具有挠性向列相混合物的掺杂剂。末端取代基的数量和性质从偶极矩小的极性取代基到偶极矩大的极性取代基不等。在二聚体的多氟芳香族基团之间的柔性脂肪族间隔中，亚甲基单位的数量也不同。具有香蕉形构象的二聚体使含有二聚体的混合物的挠曲电系数增加，并在一定程度上降低了清净点。
The synthesis is reported of new meta-substituted quaterphenyls and several related dimers as dopants for nematic mixtures with flexoelectric properties. The number and nature of the terminal substituents is varied from apolar with a small dipole moment to polar with a strong dipole moment. The number of methylene units in the flexible aliphatic spacer between the polyfluorinated aromatic groups of the dimers is also varied. Dimers capable of banana-shaped conformers induce an increase in the flexoelectric coefficients of mixtures containing them and reduce the clearing point to a small extent.