Synthesis and Thermal Stability of Bis-Quaternary Ammonium Ionic Liquids with Inorganic Anions

O. E. Zhuravlev^a^,*, A. D. Kaftanov^a, G. S. Yulmasov^a, and L. I. Voronchikhina^a

^aTver State University, Tver, 170002 Russia

email: *pifchem@mail.ru

Received 13 July, 2023

Abstract— Bis-Quaternary ammonium ionic liquids―triethylamine derivatives with hexafluorophosphate, tetrafluoroborate, and dicyanamide anions―were synthesized in the study. All compounds were characterized by IR and NMR spectroscopy. Studies of their thermal stability in air in the temperature range of 25–500°C were performed. A mechanism of thermal destruction was proposed.

Keywords: bis-quaternary ammonium ionic liquids, tetrafluoroborates, hexafluorophosphates, dicyanamides, thermal stability

DOI: 10.1134/S1070427223030138