Dielectric Studies of a Series of Liquid Crystalline Pyridine Derivates

S. Heinemann; H. Kresse; S. Saito; D. Demus

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Dielectric Studies of a Series of Liquid Crystalline Pyridine Derivates

机译：一系列液晶吡啶衍生物的介电研究

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Measurements of the temperature and frequency dependence of dielectric constants have been performed for five homologues in the range 100 Hz -10 MHz. These substances exhibit a negative anisotropy of the dielectric constants and two relaxation regions (rotation of the molecules around the short resp. long axis) in the investigated frequency range. Even in the crystalline state dipolar reorientations are possible which have been interpreted as rotations of the alkoxy group. Changes of the static dielectric constants, relaxation frequencies and transition entropies are discussed as a measure of structural changes passing the several liquid crystalline phases.

机译：已经对100 Hz -10 MHz范围内的五个同系物进行了介电常数的温度和频率依赖性测量。这些物质在研究的频率范围内表现出介电常数的负各向异性和两个弛豫区域（分子围绕短响应长轴的旋转）。即使在结晶状态下，偶极重取向也是可能的，其已被解释为烷氧基的旋转。讨论了静态介电常数，弛豫频率和跃迁熵的变化，以作为通过几种液晶相的结构变化的量度。

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《Zeitschrift fur Naturforschung. A, A journal of physical sciences》 |1996年第9期|p.1019-1026|共8页
作者
S. Heinemann; H. Kresse; S. Saito; D. Demus;
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正文语种 eng
中图分类物理学;
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dielectric constants; relaxation frequencies; transition entropies; tilted smectic phases;

机译：介电常数;弛豫频率;跃迁熵;近晶相倾斜;

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4. New Liquid Crystalline 2,5-Disubstituted Pyridine Derivatives [C] . Assya I. Pavluchenko, Vladimir F. Petrov, Shunsuke Takenaka The Fifth International Display Workshops, Dec 7-9, 1998, Kobe, Japan . 1998

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Dielectric Studies of a Series of Liquid Crystalline Pyridine Derivates

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