INFLUENCE OF ELECTRIC FIELDS ON MOLECULAR ALIGNMENT IN LIQUID CRYSTAL P-(ANISALAMINO)-PHENYL ACETATE
INFLUENCE OF ELECTRIC FIELDS ON MOLECULAR ALIGNMENT IN LIQUID CRYSTAL P-(ANISALAMINO)-PHENYL ACETATE
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DOI：
10.1080/15421406908084876
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发表时间：
1969-01-01
影响因子：
0.7
通讯作者：
CARR, EF
中科院分区：
文献类型：
--
作者：
CARR, EF
讨论了电场对对-(樟柳氨基)-苯乙酸酯液晶分子取向的影响。这种材料的行为类似于对偶氮苯甲醚的行为，因为通常观察到的有序性显示出与分子轴的对准，在低音频频率时，分子轴倾向于平行于场的方向，而对于几百kHz的频率，则垂直于场。结果比较了电场和磁场产生分子排列的有效性，支持了早先提出的解释音频下INP-偶氮苯甲醚有序化的理论。这一理论涉及与电导率有关的各向异性。结果还表明，直流电场的效果与低频音频相当。对最近在核磁共振研究中使用电场在液晶中产生有序化的工作提出了几点评论。
The effects of electric fields on the molecular alignment in the liquid crystalp-(anisalamino)-phenyl acetate are discussed. The behavior of this material is similar to that ofp-azoxyanisole in that the ordering which is normally observed shows an alignment with the molecular axis preferring a direction parallel to the field at low audio frequencies, and perpendicular to the field for frequencies of a few hundred kHz. Results comparing the effectiveness of electric and magnetic fields for producing molecular alignment are presented which support a theory presented earlier to explain the ordering inp-azoxyanisole at audio frequencies. This theory involves the anisotropy associated with the electrical conductivity. Results are also presented which show that the effectiveness of dc electric fields is comparable to that for low audio frequencies. A few comments are made concerning recent work employing electric fields to produce ordering in liquid crystals for NMR studies.