Combined Raman Scattering and X-ray Diffraction Study of Phase Transition of the Ionic Liquid [BMIM][TFSI] Under High Pressure

	Combined Raman Scattering and X-ray Diffraction Study of Phase Transition of the Ionic Liquid [BMIM][TFSI] Under High Pressure
	Wu J.; X. Zhu; H. Li; L. Su; K. Yang; X. Cheng; G. Yang; J. Liu; Liu J(刘景)
刊名	Journal of Solution Chemistry
	2015
卷号	44 期号:10 页码:2106-2116
关键词	Ionic liquid Raman spectra High pressure Phase transition Conformational change
英文摘要	In situ solidification of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][TFSI]) from melt has been investigated by using a diamond anvil cell under pressures up to about 6.0 GPa at room temperature. The results indicate that non-monotonic pressure induced Raman shifts and variation of the full width at half-maximum are suggestive of a phase transition at about 1.8 GPa upon compression, which was further confirmed to be a phase transition from liquid to a superpressurized glass by line broadening measurements of the sharp R (1) ruby fluorescence line and synchrotron X-ray diffraction measurements. The conformational changes of C (1) and C (2) conformers of the [TFSI] anion under high pressure are discussed; the C (2) conformers are predominant under high pressures. In addition, the Raman spectra of [BMIM][TFSI] under different conditions are compared in detail. The results show that the structure of the glassy state at low temperature is different from that of the high pressure state, while the glassy state is mainly composed of C (2) anion conformers, which is similar to the high pressure state.
学科主题	Chemistry
类目[WOS]	Chemistry, Physical
收录类别	SCI
WOS记录号	WOS:000363051800010
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228968]
专题	高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Wu J.,X. Zhu,H. Li,et al. Combined Raman Scattering and X-ray Diffraction Study of Phase Transition of the Ionic Liquid [BMIM][TFSI] Under High Pressure[J]. Journal of Solution Chemistry,2015,44(10):2106-2116.
APA	Wu J..,X. Zhu.,H. Li.,L. Su.,K. Yang.,...&刘景.(2015).Combined Raman Scattering and X-ray Diffraction Study of Phase Transition of the Ionic Liquid [BMIM][TFSI] Under High Pressure.Journal of Solution Chemistry,44(10),2106-2116.
MLA	Wu J.,et al."Combined Raman Scattering and X-ray Diffraction Study of Phase Transition of the Ionic Liquid [BMIM][TFSI] Under High Pressure".Journal of Solution Chemistry 44.10(2015):2106-2116.