Open AccessCalorimetric Study of Ionic Liquids Based on 4-Vinylbenzyl Triethylammonium with Chloride and Tetrafluoroborate Anion
Author(s) -
Maria E. Atlaskina,
А. Н. Марков,
Olga V. Kazarina
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1079/5/052024
Subject(s) - tetrafluoroborate , ionic liquid , chemistry , melting point , pyridine , chloride , differential scanning calorimetry , enthalpy , fourier transform infrared spectroscopy , inorganic chemistry , polymer chemistry , organic chemistry , chemical engineering , thermodynamics , catalysis , physics , engineering
In the present research, the temperature dependence of heat capacity of two ionic liquids VBTEA-Cl ( 1 ) and VBTEA-BF 4 ( 2 ) were studied. 4-Vinylbenzyl triethylammonium chloride was synthesized by original methodic. 4-Vinylbenzyl triethylammonium tetrafluoroborate was obtained via anion exchange reaction. Compounds was characterized by FTIR and NMR spectroscopies, their purity was proven. Compounds 1 and 2 were studied by different scanning calorimetry over the temperature range from 300 to 600 K. The melting point were determined for both substances, but 4-vinylbenzyl pyridine triethylammonium tetrafluoroborate wasn’t stable after melting in contrast with 4-vinylbenzyl pyridine chloride. The experimental data were used to calculate the enthalpy of phase transition (melting) for compound 1 .