One-dimensional ion transport in self-organized columnar ionic liquids
One-dimensional ion transport in self-organized columnar ionic liquids
复制标题
DOI：
10.1021/ja0382516
复制
发表时间：
2004-02-04
影响因子：
15
通讯作者：
Kato, T
中科院分区：
文献类型：
--
作者：
Yoshio, M;Mukai, T;Kato, T
合成了新型扇形离子液体，形成柱状液晶相，以获得一维离子传输材料。该离子液体由两个不相容的部分组成：作为离子传导部分的基于咪唑的离子部分和作为绝缘部分的三（烷氧基）苯基部分。合成了两种具有辛基和十二烷基链的化合物。这些材料的自组装导致在室温下形成热致六方柱状液晶态。用梳状金电极的电解池成功地测量了各向异性的一维离子电导率。通过垂直和平行于电极的剪切，自组织柱在两个方向上宏观地排列。平行于柱轴的离子电导率高于垂直于柱轴的离子电导率。在这些柱状材料中掺入锂盐导致离子电导率及其各向异性的增强。这些材料将有助于在纳米水平上的离子的各向异性传输。
New fan-shaped ionic liquids forming columnar liquid crystalline phases have been prepared to obtain one-dimensional ion-transporting materials. The ionic liquids consist of two incompatible parts: an imidazolium-based ionic part as an ion-conducting part and tris(alkyloxy)phenyl parts as insulating parts. Two compounds having octyl and dodecyl chains have been synthesized. Self-assembly of these materials leads to the formation of thermotropic hexagonal columnar liquid crystalline states at room temperature. Anisotropic one-dimensional ionic conductivities have been successfully measured by the cells having comb-shaped gold electrodes. The self-organized columns have been aligned macroscopically in two directions by shearing perpendicular and parallel to the electrodes. The ionic conductivities parallel to the column axis are higher than those perpendicular to the axis. The incorporation of lithium salts in these columnar materials leads to the enhancement of the ionic conductivities and their anisotropy. These materials would be useful for anisotropic transportation of ions at the nanometer level.