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Pressure-induced structural transitions of a room temperature ionic liquid-1-ethyl-3-methylimidazolium chloride
Chen, FJ; You, TT; Yuan, Y; Pei, CY; Ren, XT; Huang, YW; Yu, ZH; Li, XD; Zheng, HY; Pan, YX; Yang, K; Wang, L; Li XD(李晓东)
2017
Source PublicationJOURNAL OF CHEMICAL PHYSICS
ISSN0021-9606
EISSN1089-7690
Volume146Issue:9Pages:94502
SubtypeArticle
AbstractIn this paper, structural evaluations of a room temperature ionic liquid, 1-ethyl-3-methylimidazolium chloride ([EMIM] Cl), were systematically investigated at high pressures. Our Raman spectra, infrared spectra, and synchrotron X-ray diffraction investigations showthat crystalline [EMIM] Cl experienced structural instabilities at high pressures and underwent at least four successive structural transitions at around 5.8, 9.3, 15.8, and 19.1GPa, respectively. Notably, the abrupt emergence of photoluminescence from the sample at around 19.3 GPa, originated from the pressure-induced polymerization of the [EMIM](+) cations, as confirmed by the mass spectrometry experiments. Our results also indicate that high pressure significantly affected the conformational equilibrium of the [EMIM](+) cations. The structural transitions are influenced by the ion stacking modes determined by the hydrogen bonds and possibly by some chemical reactions in addition to the cation conformational isomers. Published by AIP Publishing.
DOI10.1063/1.4977044
WOS KeywordRAMAN-SPECTROSCOPY ; LIQUIDS ; SOLVENTS ; TETRAFLUOROBORATE ; CRYSTALS ; DYNAMICS ; METHYL ; PHASE
Indexed BySCI ; EI ; SCOPUS ; ADS
Language英语
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS IDWOS:000397312800054
EI Accession Number20171003424394
EI KeywordsChlorine compounds - Conformations - Ionic liquids - Isomers - Mass spectrometry - Positive ions - X ray diffraction
EI Classification Number801 Chemistry - 801.4 Physical Chemistry - 804 Chemical Products Generally
ADS Bibcode2017JChPh.146i4502C
ADS URLhttps://ui.adsabs.harvard.edu/abs/2017JChPh.146i4502C
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2017JChPh.146i4502C/citations
Citation statistics
Cited Times:2 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/284798
Collection多学科研究中心
粒子天体物理中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Chen, FJ,You, TT,Yuan, Y,et al. Pressure-induced structural transitions of a room temperature ionic liquid-1-ethyl-3-methylimidazolium chloride[J]. JOURNAL OF CHEMICAL PHYSICS,2017,146(9):94502.
APA Chen, FJ.,You, TT.,Yuan, Y.,Pei, CY.,Ren, XT.,...&李晓东.(2017).Pressure-induced structural transitions of a room temperature ionic liquid-1-ethyl-3-methylimidazolium chloride.JOURNAL OF CHEMICAL PHYSICS,146(9),94502.
MLA Chen, FJ,et al."Pressure-induced structural transitions of a room temperature ionic liquid-1-ethyl-3-methylimidazolium chloride".JOURNAL OF CHEMICAL PHYSICS 146.9(2017):94502.
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