A FAST-ATOM-BOMBARDMENT MASS-SPECTROMETRIC STUDY OF ROOM-TEMPERATURE 1-ETHYL-3-METHYLIMIDAZOLIUM CHLOROALUMINATE(III) IONIC LIQUIDS - EVIDENCE FOR THE EXISTENCE OF THE DECACHLOROTRIALUMINATE(III) ANION

被引:69
作者
ABDULSADA, AK
GREENWAY, AM
SEDDON, KR
WELTON, T
机构
[1] QUEENS UNIV BELFAST,SCH CHEM,BELFAST BT9 5AG,ANTRIM,NORTH IRELAND
[2] UNIV EXETER,DEPT CHEM,EXETER EX4 4RJ,DEVON,ENGLAND
来源
ORGANIC MASS SPECTROMETRY | 1993年 / 28卷 / 07期
关键词
D O I
10.1002/oms.1210280706
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Previous studies of 1-ethyl-3-methylimidazolium chloride-aluminium(III) chloride ([emim]Cl-AlCl3) ionic liquids have been hampered by significant contamination of these liquids by oxide impurities. Treatment of these liquids with phosgene removes the oxide impurities, and the use of a specially constructed sample inlet system for air-sensitive materials permitted them to be studied by fast atom bombardment mass spectrometry. The ions Cl-, [Cl2]-, [AlCl4]-, [Al2Cl7]-, [emim]+ and [(emim)2X]+ (X = Cl or AlCl4) were observed for the bask ionic liquid. In addition, the anion [Al3Cl10]- was observed for the acidic composition. Within the mass spectrometer, the hydrolyses of [Al3Cl10]- to produce [Al3Cl8O]- and of [Al2Cl7]- to produce [Al2Cl5O]- were observed. Comparison of these results with published O-17 NMR data suggests that the primary hydrolysis products in acidic ionic liquids are [Al3Cl8O]- and [Al2Cl5O]- and that the principal secondary hydrolysis product is [Al2Cl6(OH)]-.
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页码:759 / 765
页数:7
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