Structure and properties of new dicationic ionic liquid DBTMEDA(BF4)2
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Dicationic ionic liquid (IL) dibutyltetramethylethylenediammonium tetrafluoridoborate was synthesized for the first time by quaternization followed by ion exchange. The chemical composition was confirmed by 1H, 19F, and 13C nuclear magnetic resonance (NMR) spectroscopy. The crystal structure of the IL under discussion was determined from single crystal diffraction and can be described in monoclinic syngony with P21/c space group. Using thermal analysis and mass spectrometry, thermal stability of this IL as well as possible directions of its destruction was analyzed. Melting point for this liquid was determined by simultaneous thermal analysis as 135 °C. The electrochemical stability range for this ionic liquid was find to be nearly symmetrical accordingly to cyclic voltammetry and estimated as 3.75 V.
KeywordsIonic liquids Thermal analysis Crystal structure NMR spectroscopy Electrochemical window Conductivity
The measurements were performed at MSU equipment center “Nanochemistry and Nanomaterials” within the frameworks of Moscow University Program of Development.
Present study was supported by Russian Science Foundation project #18-13-00217.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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