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基于伊米达的离子液体与有机溶剂的二元混合物中的结复合物

Kaiyah Rush¹, Md Muhaiminul Islam², Sithara U Nawagamuwage²

¹Department of Chemistry, Xavier University of Louisiana, New Orleans, Louisiana 78125, United States.

The journal of physical chemistry. B

|October 9, 2023

概括

键会影响离子液体的特性. 与乙不同的是,二甲基硫氧化物与伊米达酸盐形成强键,突出显示了离子液中关键的酸盐-溶液相互作用.

科学领域:

物理化学物理化学
材料科学材料科学材料科学
超分子化学超分子化学

背景情况:

离子液体 (ILs) 呈现出复杂的局部结构,主要由库伦力控制.
定向键,特别是涉及乳酸酸的酸性C-2位置,显著影响IL特性.
了解阴离子 - 溶液相互作用是为特定应用量身定制 IL 行为的关键.

研究的目的:

为了研究基于伊米达的离子液体中与结合的微环境的形成和性质.
为了阐明溶解分子溶剂对这些结相互作用的影响.
为了确定1-乙基-3-甲基利米达离子与不同分子溶剂之间的特定相互作用.

主要方法:

使用C-D红外 (IR) 报告员组在imidazolium子的C-2位置.
进行了线性和非线性红外光谱学实验.
综合计算研究来分析实验数据和分子相互作用.

主要成果:

在模型离子液1-乙基-3-甲基利米达三 (pentafluoroethyl) 三酸中鉴定出不同的与结合的微环境.
在二甲基硫氧化物 (DMSO) 和在C-2位置的伊米达离子之间观察到强的与结合的二聚体形成.
发现没有证据表明乙和C-2位置上的伊米达阳离子之间的离子-溶剂结合体,尽管乙是结合体接受体.

结论:

阴离子-溶液相互作用在构造离子液体中起着至关重要的作用.
溶液的特定化学性质决定了与离子液质质的结的程度和类型.
红外光谱与记者组是一个强大的工具,用于探测局部溶解结构和离子液体中的键.

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