title: A Binary Mixture of Ionic Liquids as a New Approach for an Experimental Diffusion Correction in the Study of Activated Processes.
abstract: A binary system of two ionic liquids, 1-ethyl-3-methylimidazolium and trioctylmethylammonium bis(trifluoromethylsulfonyl)imide ([EMIM][NTf2] and [OMA][NTf2], respectively), with varying molar fractions, is introduced. It allows the dynamic viscosity to remain constant over a range of almost 60 K; this means that any activated process can be studied independent of the temperature dependence of viscosity itself. This principle is proven upon reinvestigation of electron self-exchange kinetics of tetrathiafulvalene by continuous-wave ESR line-broadening experiments. From these results, it is also confirmed that this process is totally diffusion controlled.
authors.affiliation: Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9/I, 8010, Graz, Austria.
authors.forename: Martin
authors.initials: M
authors.lastname: Berghold
authors.affiliation: Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9/I, 8010, Graz, Austria.
authors.forename: Josua
authors.initials: J
authors.lastname: Bächle
authors.affiliation: Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9/I, 8010, Graz, Austria.
authors.forename: Stephan
authors.initials: S
authors.lastname: Landgraf
authors.affiliation: Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9/I, 8010, Graz, Austria.
authors.forename: Günter
authors.initials: G
authors.lastname: Grampp
keywords: EPR spectroscopy; diffusion control; dynamic viscosity; electron transfer; ionic liquids