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首页> 外文期刊>Chemistry: A European journal >Proton Thermodynamics in a Protic Ionic Liquid, Ethylammonium Nitrate
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Proton Thermodynamics in a Protic Ionic Liquid, Ethylammonium Nitrate

机译：质子热力学在质子离子液体中，硝酸乙基铵

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摘要

In order to investigate the proton solvation state in protic ionic liquids (PILs), ten acid dissociation enthalpies and entropies of eight compounds were determined in ethylammonium nitrate (EAN). Regardless of the nature of the compound, 24 kJmol~(-1) larger enthalpy and 65 Jmol~(-1)K~(-1) larger entropy than those in water, respectively, were observed. These values were reasonably explained by the differences in the proton solvation structure in EAN and water. Namely, protons in EAN exist as HNO_3, having a higher reaction energy than that of H_3O~+ in water, undergo entropic stabilization as a result of the less-structured solvation. As such, the entropic effect of the proton solvation structure on the acid-base property is possibly applicable to all PILs. In addition, based on these proton thermodynamics, enthalpy and entropy windows were proposed as a novel perspective for the characterization of solvents. Use of this concept enabled the visualization of similarities and differences between EAN and water.
机译：为了研究质子液体（Pils）中的质子溶剂化状态，在硝酸乙基铵（EAN）中测定10个化合物的十个酸解离焓和熵。无论化合物的性质如何，观察到24 kJmol〜（-1）较大的焓和65 jmol〜（-1）k〜（-1）均分别比水的熵较大。通过EAN和水的质子溶剂化结构的差异合理地解释这些值。即，EAN中的质子作为HNO_3存在，其反应能量较高，而在水中的H_3O〜+的反应能量较高，因此由于结构较少的溶剂化而经历熵稳定性。因此，质子溶剂化结构对酸碱性质的熵效应可能适用于所有PILs。另外，基于这些质子热力学，提出了焓和熵窗作为溶剂表征的新颖性观点。使用这种概念使IEN和水之间的相似性和差异的可视化。

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