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Dielectric Relaxation and Solvation Dynamics in a Prototypical Ionic Liquid + Dipolar Protic Liquid Mixture: 1-Butyl-3-Methylimidazolium Tetrafluoroborate + Water.

Zhang, Xin-Xing ; Liang, Min ; Hunger, Johannes ; Buchner, Richard ; Maroncelli, Mark


Dielec. and solvation data on mixts. of 1-butyl-3-methylimidazolium tetrafluoroborate ([Im41][BF4]) + water are reported and used to examine the utility of dielec. solvation models. Dielec. permittivity and loss spectra (25 °C) were recorded over the frequency range 200 MHz to 89 GHz at 17 compns. and fit to a 4-Debye form. Dynamic Stokes shift measurements on the solute coumarin 153 (C153), ...


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