Evidence that Acetonitrile is Sensitive to Different Interaction Sites of Ionic Liquids as Revealed by Excess Spectroscopy
Evidence that Acetonitrile is Sensitive to Different Interaction Sites of Ionic Liquids as Revealed by Excess Spectroscopy
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过量光谱显示乙腈对离子液体的不同相互作用位点敏感的证据
DOI：
10.1002/cphc.201601376
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发表时间：
2017
期刊：
影响因子：
2.9
通讯作者：
Yu ZW
中科院分区：
文献类型：
--
作者：
Zhou Yu;Zheng Yan-Zhen;Zhang Tian;Deng Geng;Yu Zhi-Wu;Zhou Yu;Yu ZW
通过研究离子液体，1-乙基-3-甲基咪唑双（三氟甲基磺酰基）酰亚胺和共溶剂乙腈之间的相互作用，发现C-N伸缩振动对不同的相互作用位点敏感，如过量红外光谱所示.确定了乙腈分子的四种存在形式，并获得了离子液体稀释后的详细转化过程。腈基的这些特性从其与质子供体形成氢键的能力的观点进行了讨论。据信，这是由于与其他基团如S=O、CH 3和芳香族C−H相比，C = N基团的中间电荷供给能力。
By studying the interactions between an ionic liquid, 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide, and a co‐solvent acetonitrile, the C≡N stretching vibration is found to be sensitive to different interaction sites as shown by excess infrared spectroscopy. Four existing forms of acetonitrile molecules are identified and a detailed transformation process of the ionic liquid upon dilution is obtained. Such characteristics of the nitrile group are discussed from the viewpoint of its ability to form hydrogen bonds with proton donors. It is believed that this is due to the intermediate charge donating ability of the C≡N group as compared with other groups such as S=O, CH3, and aromatic C−H.