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首页> 外文期刊>Chemistry: A European journal >High charge-carrier mobility in pi-deficient discotic mesogens: Design and structure-property relationship
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High charge-carrier mobility in pi-deficient discotic mesogens: Design and structure-property relationship

机译：缺乏pi的盘状介晶中的高电荷载流子迁移率：设计与结构-性质关系

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摘要

Hexaazatrinaphthylene (HATNA) derivatives with six alkylsulfanyl chains of different length (hexyl, octvl, decyl and dodecyl) have been designed to obtain new potential electron-carrier materials. The electron-deficient nature of these compounds has been demonstrated by cyclic voltammetry. Their thermotropic behaviour has been studied by means of differential scanning calorimetry and polarised optical microscopy. The supramolecular organisation of these discotic molecules has been explored by temperature-dependent X-ray diffraction on powders and oriented samples. In addition to various liquid crystalline columnar phases (Col(hd), Col(rd)), an anisotropic plastic crystal phase is demonstrated to exist. The charge-carrier mobilities have been measured with the pulse-radiolysis time-resolved microwave-conductivity technique. They are found to be higher in the crystalline than in the liquid crystalline phases, with maximum values of approximately 0.9 and 0.3 cm(2) V-1 s(-1), respectively, for the decylsulfanyl derivative. Mobilities strongly depend on the nature of the side chains.
机译：已设计了具有六个不同长度的烷基硫烷基链（己基，辛基，癸基和十二烷基）的六氮杂萘基萘（HATNA）衍生物，以获得新的潜在电子载体材料。这些化合物的电子不足性质已通过循环伏安法证明。已经通过差示扫描量热法和偏振光学显微镜研究了它们的热致行为。这些盘状分子的超分子组织已通过对粉末和定向样品的温度依赖性X射线衍射进行了探索。除了各种液晶柱状相（Col（hd），Col（rd））以外，还证明了存在各向异性的塑性结晶相。载流子迁移率已通过脉冲辐射分解时间分辨微波电导率技术进行了测量。发现它们在结晶相中比在液晶相中更高，对于癸基硫烷基衍生物，最大值分别约为0.9和0.3 cm（2）V-1 s（-1）。流动性在很大程度上取决于侧链的性质。

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