Uses
1-Ethylpyridinium bromide is an ionic liquid with a higher thermal decomposition temperature than 1-propylpyridinium bromide[6]. The compound serves as an electrolyte component in aqueous solutions for cyclic voltammetry studies of zinc electrodeposition and stripping, including SEM imaging of deposits on FTO glass[7].
Synthesis
The one-step synthesis of 1-ethylpyridin-1-ium bromide ([EPy]Br) proceeded as follows: 4.2 mol of ethyl bromide and 4.0 mol of pyridine were added to a 1000 mL round-bottom flask. The reaction mixture was placed in a combined ultrasound-microwave reactor, and the loss of volatile bromoethane was controlled by a cooling water condensation system. The ultrasonic power was set at 1000 W, the microwave heating power was set at 800 W, the reaction temperature was maintained at 50 °C, and the reaction time was 60 min. Upon completion of the reaction, the yield of 1-ethylpyridin-1-ium bromide was calculated to be 89%.
References
[1] Bulletin of the Chemical Society of Japan, 1986, vol. 59, # 3, p. 757 - 762
[2] Journal of the American Chemical Society, 1985, vol. 107, # 16, p. 4655 - 4662
[3] Journal of Physical Chemistry, 1986, vol. 90, # 4, p. 641 - 644
[4] Journal of Physical Chemistry A, 2010, vol. 114, # 11, p. 3782 - 3787
[5] Green Chemistry, 2011, vol. 13, # 6, p. 1527 - 1535
