Orientational ordering of alkyl chain at the air/liquid interface of ionic liquids studied by sum frequency vibrational spectroscopy

Orientation of cations at the air/liquid interfaces of the salts of 1-butyl-3-methyl imidazolium with tetrafluoroborate and hexafluorophosphate is studied using infrared–visible sum frequency vibrational spectroscopy. For both salts, quantitative analyses show that the terminal methyl group of the b...

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Bibliographic Details
Published in:Chemical physics letters 2004-05, Vol.389 (4), p.321-326
Main Authors: Iimori, Toshifumi, Iwahashi, Takashi, Ishii, Hisao, Seki, Kazuhiko, Ouchi, Yukio, Ozawa, Ryosuke, Hamaguchi, Hiro-o, Kim, Doseok
Format: Article
Language:English
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Summary:Orientation of cations at the air/liquid interfaces of the salts of 1-butyl-3-methyl imidazolium with tetrafluoroborate and hexafluorophosphate is studied using infrared–visible sum frequency vibrational spectroscopy. For both salts, quantitative analyses show that the terminal methyl group of the butyl chain is polar-oriented with its symmetry axis aligned nearly vertical to the surface.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2004.03.099