Synthesis of new fluorine-containing room temperature ionic liquids and their physical and electrochemical properties
An improved synthesis of fluorine-containing room temperature ionic liquids (FRTILs) is described. Twelve FRTILs are synthesized, in which the fluorinated cations based on N-methyl pyrrolidinium (MPy), 1-methly imidazolium (MIm) and diethylsulfide (DES) a
Mei, Xinyi,Yue, Zheng,Tufts, Jim,Dunya, Hamza,Mandal, Braja K.
p. 26 - 37
(2018/06/01)
Synthesis and physical properties of new fluoroether sulfones
Eight new strategically designed fluoroether sulfone solvents have been synthesized through different synthetic pathways for potential applications in lithium-sulfur battery electrolytes. The structures of these compounds have been confirmed by 1H-NMR, 13C-NMR and elemental analysis. Several 1,2-dimethoxyethane (DME)-based electrolyte formulations have been prepared with these solvents to derive an electrolyte with good ionic conductivity (>5 mS cm?1 at 25 ℃). The viscosity of these new additives has also been determined as it is directly related to the ionic conductivity. Three of these solvents that contain a trifluoromethyl group displayed acceptable ionic conductivity.
Yue, Zheng,Mei, Xinyi,Dunya, Hamza,Ma, Qiang,McGarry, Christopher,Mandal, Braja K.
p. 118 - 123
(2018/11/10)
Process for hydroxyalkylation of fluorinated alcohols
Mono O-hydroxyalkylated derivatives of 1,1-dihydroperfluorinated or 1H,1-alkylperfluorinated alcohols are prepared by reacting the alcohols with alkylene carbonates at a temperature of at least 60° C. in the presence of a one- or two-part catalyst. The catalyst is a nitrogenous base, optionally in combination with a tetraalkylammonium halide. The O-hydroxyalkylated derivatives are useful non-ionic surfactants and emulsifiable compounds for fire extinguishing systems.
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(2008/06/13)
O-Hydroxyethylation of 1,1-dihydroperfluorinated alcohols
A convenient transformation of 1,1-dihydroperfluorinated alcohols into O-hydroxyethyl derivatives (RFCH2OCH2CH2OH) is described in which ethylene carbonate is utilized as the alkylating agent. Tetraalkylammonium iodides and trialkylamines are effective catalysts.
Heilmann, S. M.,Drtina, G. J.,Janulis, E. P.,Krepski, L. R.,Rasmussen, J. K.,et al.
p. 387 - 396
(2007/10/02)
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