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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Dynamic Motion of Twisted pi System-Induced Temperature-Dependent Dielectric Response in the Neat Liquid
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Dynamic Motion of Twisted pi System-Induced Temperature-Dependent Dielectric Response in the Neat Liquid

机译:稀液中扭曲PI系统诱导温度依赖性介质响应的动态运动

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摘要

Molecular assemblies of twisted pi molecules of tetraphenylene with long alkoxy chains (1) and tetra[2,3]thienylene with long alkylamide chains (2) or long alkoxy chains (3) and their dielectric properties were investigated. Different degrees of intermolecular interaction of 1-3 afforded different molecular assemblies, including an ordered columnar structure, disordered columnar, and lamellar structures. The introduction of long alkyl chains enabled us to create thermally stable liquid crystalline or liquid states. Temperature-dependent dielectric measurement revealed that the dynamic flipping motion of the tetra[2,3]thienylene core of 3 induced a temperature- and frequency-dependent dielectric anomaly in the neat liquid phase. This flipping motion of the central tetra[2,3]thienylene pi core occurred relatively easily in the liquid state with a high degree of freedom of molecular motion.
机译:研究了具有长烷氧基链(1)和具有长烷基酰胺链(2)或长烷氧基链(3)的T4烷基链(1)和Tetra [2,3]噻吩基噻吩并[2,3]噻吩基的分子组件及其长烷氧基链及其介电性能。 1-3的不同分子间相互作用提供不同的分子组件,包括有序柱状结构,无序柱状和层状结构。 使长烷基链的引入使我们能够产生热稳定的液晶或液态。 温度依赖性介电测量表明,3的TETRA [2,3]噻吩基核的动态翻转运动诱导纯液相中的温度和频率依赖性介电异常。 中央Tetra [2,3]噻吩基PI芯的这种翻转运动在液态中相对容易地发生,具有高度的分子运动自由度。

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