title: Effect of Dimethyl Carbonate on the Dynamic Properties and Ionicities of Ionic Liquids with [M(III) (hfip)4 ](-) (M=B, Al) Anions.
abstract: Several ionic liquids (ILs) comprising [B(hfip)4 ](-) [hfip=OCH(CF3 )2 ] or [Al(hfip)4 ](-) anions and imidazolium or ammonium cations were prepared and mixed with up to 270 mol % of dimethyl carbonate (DMC). The viscosities, conductivities, and self-diffusion constants of these mixtures and, where possible, of the neat ILs were measured and compared with common [NTf2 ](-) based ILs and their mixtures with DMC. A tremendous decrease of the viscosities and a likewise increase of the conductivities and diffusion constants can be achieved for all classes of ILs. However, the order of the conductivities is partially reversed in the diffusion data. This is probably due to the low dielectric constant of DMC and the, thus, favored ion pairing, as evidenced, for example, by the calculated ionicities. Altogether, our data show that the chemically robust, but high-melting and more viscous [B(hfip)4 ](-) ILs might be candidates for electrolytes when mixed with suitable molecular solvents.
authors: Institute for Inorganic and Analytical Chemistry, Albertstrasse 21, 79104 Freiburg (Germany).|Freiburg Materials Research Center (FMF), Stefan-Meier-Strasse 21, 79104 Freiburg (Germany).
authors: Alexander B A
authors: AB
authors: Rupp
authors: Institute for Inorganic and Analytical Chemistry, Albertstrasse 21, 79104 Freiburg (Germany).
authors: Sabrina
authors: S
authors: Welle
authors: Institute for Inorganic and Analytical Chemistry, Albertstrasse 21, 79104 Freiburg (Germany).
authors: Petra
authors: P
authors: Klose
authors: Institute for Inorganic and Analytical Chemistry, Albertstrasse 21, 79104 Freiburg (Germany).
authors: Harald
authors: H
authors: Scherer
authors: Institute for Inorganic and Analytical Chemistry, Albertstrasse 21, 79104 Freiburg (Germany). krossing@uni-freiburg.de.|Freiburg Materials Research Center (FMF), Stefan-Meier-Strasse 21, 79104 Freiburg (Germany). krossing@uni-freiburg.de.
authors: Ingo
authors: I
authors: Krossing
keywords: electrolytes; ion pairs; ionic liquids; ionicity; transport properties