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arXiv 1412.2298cond-mat.mtrl-sciphysics.chem-ph
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氨基酸基离子液体的水溶液。色散与结构

Aqueous Solutions of Amino Acid Based Ionic Liquids. Dispersion and Structure

Vitaly V. Chaban, Eudes Eterno Fileti

摘要:

新的离子液体(IL)不断引入,涉及越来越多的有机和无机离子。基于氨基酸的离子液体(AAIL)由于其天然来源和据称的低成本而代表了特定的兴趣。我们应用我们最近开发的力场咪唑基AAILs在其水溶液中通过分子动力学(MD)模拟的结构性能进行调查。通过报告聚类分析,径向分布函数和空间分布函数,我们认为,AAIL离子分散在水介质中,无论AAIL含量。AAILs的水溶液表现出作为化学工程溶剂的理想性能。AAIL在相对稀的水溶液(10摩尔% AAIL)中以离子对形式存在,而更浓的溶液则具有一定量的较大离子聚集体。

英文摘要:

New ionic liquids (ILs) are continuously introduced involving an increasing number of organic and inorganic ions. Amino acid based ILs (AAILs) represent a specific interest due to their natural origin and, allegedly, low cost. We apply our recently developed force field for imidazolium-based AAILs to investigate structure properties in their aqueous solutions via molecular dynamics (MD) simulations. By reporting cluster analysis, radial distribution functions and spatial distribution functions, we argue that AAIL ions are well dispersed in the aqueous media, irrespective of the AAIL content. Aqueous solutions of AAILs exhibit desirable properties as solvents for chemical engineering. The AAILs in relatively dilute aqueous solutions (10 mol% AAIL) exist as ion pairs, while more concentrated solutions feature certain amount of larger ionic aggregates.

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