光第二高調波発生法によるN-アルキルイソキノリニウム系イオン液体|水界面の構造解析(<特集>機能性界面と分析化学)

概要

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The orientation of cations at the interface between water and a room-temperature ionic liquid (RTIL) has been analyzed using optical second harmonic generation. To detect second harmonic light from the RTILlwater interface with high sensitivity, a RTIL, N-dodecylisoquinolinium bis(pen tafluoroethylsulfonyl)imide, which is based on N-dodecylisoquinolinium(C_<12>Iq^+) having strong hydrophobicity and high hyperpolarizability, has been used. A polarization-dependence measurement of the light intensity of the second harmonic light has suggested that C_<12>Iq^+ is orientated at the RTIL|water interface with the isoquinolinium moiety tilting at 50° with respect to the surface normal, and with the dodecyl moiety protruding to the RTIL phase.
社団法人日本分析化学会の論文
2007-06-05