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首页> 外文期刊>Chemistry: A European journal >Supramolecular Ionic-Liquid Gels with High Ionic Conductivity
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Supramolecular Ionic-Liquid Gels with High Ionic Conductivity

机译：具有高离子电导率的超分子离子液体凝胶

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摘要

Supramolecular ionogels were prepared by the gelation of room-temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]) with (S,S)-bis(leucinol)oxalamide. Remarkably, the ionic conductivity of solutions and ionogels with low gelator concentrations is higher than that of neat [BMIm][BF4]. On the basis of molecular dynamics simulations and quantum mechanical calculations, the origin of this phenomenon is attributed to the higher affinity of gelator molecules towards [BF4](-) ions, which reduces the electrostatic attraction between [BMIm](+) and [BF4](-) and thus increases their mobility. With increasing gelator concentration, the ionic conductivity decreases due to the formation of a denser gelator matrix, which hinders the pathways for ionic transport. However, even for very dense ionogels, this decrease is less than one order of magnitude relative to neat [BMIm][BF4], and thus they can be classified as highly conductive materials with strong potential for application as functional electrolytes.
机译：超分子离子凝胶是通过将室温离子液体1-丁基-3-甲基咪唑四氟硼酸盐（[BMIm] [BF4]）与（S，S）-双（亮氨醇）草酰胺凝胶化而制备的。值得注意的是，低胶凝剂浓度的溶液和离子凝胶的离子电导率比纯[BMIm] [BF4]高。在分子动力学模拟和量子力学计算的基础上，此现象的根源归因于胶凝剂分子对[BF4]（-）离子的亲和力更高，从而降低了[BMIm]（+）与[BF4]之间的静电吸引]（-），从而增加了他们的机动性。随着胶凝剂浓度的增加，由于形成了致密的胶凝剂基质，离子电导率降低，这阻碍了离子迁移的途径。然而，即使对于非常稠密的离子凝胶，相对于纯净的[BMIm] [BF4]，这种降低也小于一个数量级，因此它们可以被归类为具有强大潜力的高导电性材料，可用作功能性电解质。

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