Herzig, Tobias and Schreiner, Christian and Bruglachner, Hartmut and Jordan, Steffen and Sclunidt, Michael and Gores, Heiner J. (2008) Temperature and concentration dependence of conductivities of some new semichelatoborates in acetonitrile and comparison with other borates. JOURNAL OF CHEMICAL AND ENGINEERING DATA, 53 (2). pp. 434-438. ISSN 0021-9568,
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Data on the temperature and concentration dependence of conductivities of some new ionic liquids based on the reduced symmetry of the semichelato-borate anion are presented and compared to data for the corresponding symmetrical chelato-borate and tetrafluoroborate salts. The compounds under investigation are the semichelato-borates tetraethylammoniurn difluoromono[1,2-oxalato(2-)-O,O']borate ([TEA][BF2OX]) and the new 1-ethyl-3-methylimidazolium difluoromoho[1,2-oxalato(2-)-O,O']borate ([EMIM][BF2OX]), the chelato-borates tetraethylammonium bis[1,2-oxaIato(2+0,0']borate ([TEA][B(OX)(2)]) and the new 1-ethyl-3-methylimidazolium bis[1,2-oxalato(2-)-.O,O']borate ([EMlM][B(OX)(2)]), and the well-known tetrafluoroborates tetraethylammoniurn tetrafluoroborate ([TEA][BF4]) and 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][131741). The concentration dependence of conductivities of [TEA][BF2OX], [EMIM][BF2OX], [TEAI[B(OX)(2)], [EMIMI[B(OX)(2)], [TEA][BF4], and [EMIM][BF4] in pure acetonitrile was measured at 25 degrees C, 5 degrees C, -15 degrees C, and -35 degrees C and fitted to the Casteel-Amis equation. Data presented in this work should clarify the influence of reduced symmetry caused by the substitution of two fluorine atoms by the oxalate moiety in the borate anion on its conductivity behavior, especially at low temperatures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DOUBLE-LAYER CAPACITORS; IONIC LIQUIDS; ELECTROCHEMICAL CAPACITORS; NONAQUEOUS ELECTROLYTES; PROPYLENE CARBONATE; CONDUCTANCE; SALTS; CATIONS; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Heiner Jakob Gores |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Nov 2020 07:32 |
| Last Modified: | 10 Nov 2020 07:32 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31425 |
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