標題: Effects of water and methanol on the molecular organization of 1-butyl-3-methylimidazolium tetrafluoroborate as functions of pressure and concentration
作者: Chang, Hai-Chou
Jiang, Jyh-Chiang
Liou, You-Chang
Hung, Chao-Hsin
Lai, Ting-Yun
Lin, Sheng Hsien
應用化學系
Department of Applied Chemistry
公開日期: 28-七月-2008
摘要: The structural organization in mixtures of 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF(4)])/water or methanol was studied by infrared spectroscopy. No drastic change in the concentration dependence of the alkyl C-H band frequency was observed at high concentration of the ionic liquid. This behavior indicates a clustering of the ionic liquid in alkyl regions. Nevertheless, the presence of methanol significantly perturbs the ionic liquid-ionic liquid associations in the imidazolium region. On the basis of the responses to change in pressure and concentration, two different types of O-H species, i.e., free O-H and bonded O-H, were observed in the O-H stretching region. For [bmim][BF(4)]/water mixtures, the compression leads to loss of the free O-H band intensity. It is likely that free O-H is switched to bonded O-H as high pressures are applied. For [bmim][BF(4)]/methanol mixtures, the free O-H is still stable under high pressures. (C) 2008 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.2958256
http://hdl.handle.net/11536/8554
ISSN: 0021-9606
DOI: 10.1063/1.2958256
期刊: JOURNAL OF CHEMICAL PHYSICS
Volume: 129
Issue: 4
結束頁: 
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