Stability,acidity and interaction properties of [Bmim][SbF_6] coupled with concentrated sulfuric acid

作     者：Honghua Zhang Ruixia Liu Ruirui Zhang Feng Huo Zhiqiang Yang Bin He Suojiang Zhang Yanji Wang 

作者机构：School of Chemical EngineeringHebei University of Technology Key Laboratory of Green Process and EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of Sciences 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2017年第60卷第9期

页      面：1243-1249页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the One Hundred Talent Program of CAS National Natural Science Foundation of China Petroleum & Chemical Corporation Joint Fund(U1662129) Key Program of National Natural Science Foundation of China(91434203) Key Research Program ofFrontier Sciences,CAS(QYZDY-SSW-JSCO11) State Key Laboratory of Multiphase Complex Systems,IPE,CAS(MPCS-2015-A-05) 

主　　题：Electrodeposition Electrospray ionization Fourier transform infrared spectroscopy Hydrogen bonds Ionic liquids Mass spectrometry Molecular dynamics Sulfuric acid 

摘      要：Ionic liquid coupled with strong acid systems presents considerable promise in some catalytic fields. In the present work, the multiple complex systems composed by 98 wt% concentrated sulfuric acid and [Bmim][SbF6] were investigated in the terms of stability, acidity and interaction properties. It was found that acidolysis of [Bmim][SbF6] occurred in the 98 wt% concentrated sulfuric acid accompanied by HF releasing and SbF6−degrading to [SbF6−y(HSO4)y]−. The species after acidolysis in the multiple complex systems were checked and confirmed by electrospray ionization mass spectrometry (ESI-MS), Fourier transform infrared spectroscopy (FT-IR),1H NMR and19F NMR. Acidity increased slightly with less than 1 wt% [Bmim][SbF6] addition, while decreased with more proportion, which was determined based on the Hammett acidity functions H0, using13C NMR. The strong hydrogen bond S–O–HF of interaction among the multiple complex systems was confirmed by molecular dynamic simulation. © 2017, Science China Press and Springer-Verlag Berlin Heidelberg.