Shimura Harutoki, Yoshio Masafumi, Hoshino Koji, Mukai Tomohiro, Ohno Hiroyuki, Kato Takashi
Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
J Am Chem Soc. 2008 Feb 6;130(5):1759-65. doi: 10.1021/ja0775220. Epub 2008 Jan 15.
Noncovalent design of new liquid-crystalline (LC) columnar assemblies based on an ionic liquid has shown to be useful to achieve anisotropic high ionic conductivities. An equimolar mixture of an ionic liquid, 1-butyl-3-methylimidazolium bromide, and 3-[3,4,5-tri(octyloxy)benzoyloxy]propane-1,2-diol, which is partially miscible with the ionic liquid, exhibits an LC hexagonal columnar phase from -4 to 63 degrees C. This columnar supramolecular assembly forming the nanostructures shows the one-dimensional (1D) ionic conductivity of 3.9 x 10(-3) S cm(-1) at 50 degrees C along the column, which is more than 700 times higher than that of the corresponding covalent-type columnar ionic liquid, 1-methyl-3-[3,4,5-tri(octyloxy)benzyl]imidazolium bromide, which is 5.3 x 10(-6) S cm(-1) at 50 degrees C. This significant enhancement of the ionic conductivity is attributed to the increase of the mobility of the ionic part.
基于离子液体的新型液晶（LC）柱状组装体的非共价设计已被证明有助于实现各向异性的高离子电导率。离子液体1-丁基-3-甲基咪唑溴化物与部分可与该离子液体混溶的3-[3,4,5-三（辛氧基）苯甲酰氧基]丙烷-1,2-二醇的等摩尔混合物，在-4至63摄氏度范围内呈现出LC六方柱状相。这种形成纳米结构的柱状超分子组装体在50摄氏度时沿柱方向的一维（1D）离子电导率为3.9×10⁻³ S cm⁻¹，比相应的共价型柱状离子液体1-甲基-3-[3,4,5-三（辛氧基）苄基]咪唑溴化物在50摄氏度时的5.3×10⁻⁶ S cm⁻¹高出700多倍。离子电导率的这种显著提高归因于离子部分迁移率的增加。
Zotero 插件