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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >The Structure—Activity Relationship and Physicochemical Properties of Acetamide-Based Bronsted Acid Ionic Liquids
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The Structure—Activity Relationship and Physicochemical Properties of Acetamide-Based Bronsted Acid Ionic Liquids

机译：乙酰胺基布朗斯台德酸离子液体的结构-活性关系和理化性质

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摘要

We prepared three series of novel protic ionic liquids (PILs) based on acetamide arid a Br0nsted acid (HX, where X is CF3COO~-, CH3COO~-, or HSO_4~-) by a simple atom-econpmic neutralization reaction. We investigated their physicochemical properties, such as acidic scale, viscosity, ionic conductivity, and thermal characteristics, as well as the structure-activity relationships of these PILs. Carboxylic acid formation is only observed in the acetamide sulfate complex system by FT-IR. The ionic conductivities for most of the samples are between 10~(-3) and 10~(-1) S/m at room temperature and at low viscosity. Acetamide trifluoroacetate (ATFA) with a molar ratio of 5/5 (acetamide/trirluoroacetic acid) has an ionic conductivity of 0.25 S/m, and its viscosity is only 10 cP at 25 °C. The samples1 exhibit better properties at higher temperatures. ATFA with molar ratios of 7/3 and 8/2 have ionic conductivities of 1.13 and 1.07 S/m at 80 °C, respectively. Moreover, most of the prepared samples possess relatively moderate thermal stabilities (up to 106 °.C for ATFA) and a wide liquid range (down to -69 °C for ATFA). All these properties make these acetamide-based PILs of interest as reaction media, as catalysts in organic synthesis, or as electrolytes in fuel cells.
机译：我们通过简单的原子-原子中和反应，基于乙酰胺和布朗斯台德酸（HX，其中X为CF3COO〜-，CH3COO〜-或HSO_4〜-）制备了三种系列的新型质子离子液体（PIL）。我们研究了它们的理化性质，例如酸性水垢，粘度，离子电导率和热特性，以及这些PIL的结构活性关系。仅通过FT-IR在硫酸乙酰胺络合物系统中观察到羧酸的形成。在室温和低粘度下，大多数样品的离子电导率在10〜（-3）和10〜（-1）S / m之间。摩尔比为5/5（乙酰胺/三氟乙酸）的乙酰胺三氟乙酸盐（ATFA）的离子电导率为0.25 S / m，在25°C下的粘度仅为10 cP。样品1在较高温度下表现出更好的性能。摩尔比为7/3和8/2的ATFA在80°C下的离子电导率分别为1.13和1.07 S / m。此外，大多数制备的样品具有相对中等的热稳定性（ATFA高达106°C）和宽广的液体范围（ATFA高达-69°C）。所有这些特性使这些基于乙酰胺的PIL成为反应介质，有机合成中的催化剂或燃料电池中的电解质。

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