Effects of para-substitution and alkyl chain length on the melting points of tunable aryl alkyl pyrazolium hexafluorophosphate ionic liquids

2018-04-27
Ionic liquids (ILs) are low-melting organic salts that consist entirely of ions. During the last decade, they have found numerous applications because of their unique properties such as wide liquid range, nonflammability and negligible vapor pressure at ambient temperatures [1-3]. The properties of ILs can be tuned by changing the constituent ions. In recent years, unlike commonly known alkyl substituted ILs a new class of ILs called Tunable Aryl Alkyl Ionic Liquids (TAAILs) has drawn attention [4-6]. By replacing one of the two alkyl groups on the cation with an aryl ring, a wide range of possibilities to tune the properties of TAAILs is provided. In this study, eight new tunable aryl alkyl pyrazolium hexafluorophosphate ionic liquids were synthesized via three step reaction and characterized. The effects of para-substituted electronwithdrawing (-Br, -Cl) and electron-donating (-CH3, -OCH3) substituents and alkyl chain length (-Ethyl, or –Butyl) on the melting points of synthesized salts were investigated.
Citation Formats
M. Özdemir, “Effects of para-substitution and alkyl chain length on the melting points of tunable aryl alkyl pyrazolium hexafluorophosphate ionic liquids,” Ankara, Turkey, 2018, p. 29, Accessed: 00, 2021. [Online]. Available: https://www.eurasianbiochem.org/bildiri%20taslaklar%C4%B1/Abstract_Book_EurasianBioChem_2018.pdf.