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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 27, Number 11
BKCSDE 27(11)
November 20, 2006 

XPS Investigation of A3 Coupling Reaction in Room Temperature Ionic Liquids
Ji Hye Kwon, So Won Youn, Yong-Cheol Kang*
X-ray photoelectron Spectroscopy, Ultra-high vacuum, A3 coupling reaction, Room temperature ionic liquid
We herein report a new analytical application of XPS to the identification of organic molecules in room temperature ionic liquid for the first time. An organic compound, propargylamine (1), produced in 1-butyl-3- methylimidazolium hexafluorophosphate ([bmim][PF6]), which is one of the room temperature ionic liquids (RTILs), via A3 coupling reaction, is characterized by means of x-ray photoelectron spectroscopy (XPS) rather than using conventional organic compound analysis techniques. There are four non-equivalent carbons in RTILs and 1 each. The ratios of normalized integrated areas of the deconvoluted binding energy of core electron of carbon (C1s) peaks are well matched to the number of carbons in those compounds. The binding energies of C1s of the featured carbons in 1, C4 (sp carbons in acetylene group) and C5 (sp2 carbons in benzene ring), are assigned 286.2 and 285.4 eV, respectively. These results will be able to provide an important tool and a new strategy for the analysis of organic molecules
1851 - 1853
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