Intermolecular dynamics of room temperature ionic liquids having imidazolium cations

초록

Room temperature ionic liquids having 1-butyl-3-methylimidazolium ([BMIM]) cations and three different anions ([BMIM][PF6], [BMIM][BF4], [BMIM]Br) were studied by using Optical Heterodyne Detected-Optical Kerr Effect (OHD-OKE) spectroscopy to find out the effect of the anion size on the intermolecular dynamics. Fourier transformation of the time-domain OHD-OKE signals yielded a broad band in the spectra below 150 cm(-1). The modes with frequencies around 15, 80 and 100 cm(-1) used to fit the spectra all shifted to higher frequencies with the decrease in the anion size due to changes in the intermolecular force and the reduced mass. (C) 2012 Elsevier B.V. All rights reserved.

키워드