Monocationic and dicationic phosphonium based ionic liquids: Synthesis and properties
AMINUDDIN Muhammad Syahir, BUSTAM Mohamad Azmi, JOHARI Khairiraihanna
Abstract. In the current work, two monocationic ionic liquids (MILs) and two dicationic ionic liquids (DILs) with similar trihexyl(tetradecyl)phosphonium cation, [P66614]+ and different metal chloride anions such as trichlorostannate anion, [SnCl3]-, pentachlorozirconate anion, [ZrCl5]-, tetrachloronickelate(II) anion, [NiCl4]2- and tetrachlorocuprate(II) anion, [CuCl4]2- were successfully synthesized and characterized, respectively. The structures of ILs were confirmed using FT-IR spectroscopy and CHNS elemental analysis. The effect of temperature and anion type on thermophysical properties such as viscosity, density and refractive index were studied. Viscosity and density were measured within temperature range of 25 ℃ to 100 ℃. Moreover, thermal expansion coefficient, molecular volume, molar volume and free volume were derived from viscosity and density values. Refractive index values were measured in the temperature range of 10 ℃ to 60 ℃ and were used further to estimate the electronic polarizability using Lorenz-Lorentz equation. Thermal properties of the synthesized MILs and DILs were determined using thermogravimetric analyzer (TGA) and differential scanning calorimetry (DSC).
Keywords
Monocationic Ionic Liquids, Dicationic Ionic Liquids, Refractive Index, Thermal Behavior, Derived Properties
Published online 4/25/2025, 6 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: AMINUDDIN Muhammad Syahir, BUSTAM Mohamad Azmi, JOHARI Khairiraihanna, Monocationic and dicationic phosphonium based ionic liquids: Synthesis and properties, Materials Research Proceedings, Vol. 53, pp 1-16, 2025
DOI: https://doi.org/10.21741/9781644903575-1
The article was published as article 1 of the book Decarbonization Technology
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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