Premium
Evidence that Acetonitrile is Sensitive to Different Interaction Sites of Ionic Liquids as Revealed by Excess Spectroscopy
Author(s) -
Zhou Yu,
Zheng YanZhen,
Zhang Tian,
Deng Geng,
Yu ZhiWu
Publication year - 2017
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201601376
Subject(s) - acetonitrile , ionic liquid , nitrile , chemistry , solvent , hydrogen bond , infrared spectroscopy , imide , molecule , ionic bonding , spectroscopy , dilution , organic chemistry , ion , physics , quantum mechanics , thermodynamics , catalysis
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, CH 3 , and aromatic C−H.