Noncovalent approach to one-dimensional ion conductors: enhancement of ionic conductivities in nanostructured columnar liquid crystals.
Noncovalent approach to one-dimensional ion conductors: enhancement of ionic conductivities in nanostructured columnar liquid crystals.
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DOI：
10.1021/ja0775220
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发表时间：
2008-01
影响因子：
15
通讯作者：
Harutoki Shimura;Masafumi Yoshio;K. Hoshino;Tomohiro Mukai;H. Ohno;Takashi Kato
中科院分区：
文献类型：
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作者：
Harutoki Shimura;Masafumi Yoshio;K. Hoshino;Tomohiro Mukai;H. Ohno;Takashi Kato
基于离子液体的新型液晶(LC)柱状组件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。离子液体、1-丁基-3-甲基咪唑溴化铵和与离子液体部分相容的3-[3，4，5-tri(octyloxy)benzoyloxy]propane-1，2-diol，的等摩尔混合物，在-4-63℃范围内呈现LC六方柱状相。这种形成纳米结构的柱状超分子组装显示，在50℃时，沿着柱子的一维(1D)离子电导率为3.9x10(-3)S厘米(-1)，这是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]咪唑溴盐在50℃时为5.3×10(-6)S厘米(-1)。这种离子电导率的显著提高归因于离子部分迁移率的增加。
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.