Physico-Chemical Properties of Magnetic Dicationic Ionic Liquids with Tetrahaloferrate Anions

Anham Zafar; Imtiaz-Ud-Din; Robert G Palgrave; Haji Muhammad; Sammer Yousuf; Tim Evans

doi:10.1002/open.202200229

Physico-Chemical Properties of Magnetic Dicationic Ionic Liquids with Tetrahaloferrate Anions

ChemistryOpen. 2023 Jan;12(1):e202200229. doi: 10.1002/open.202200229.

Authors

Anham Zafar^{1

2}, Imtiaz-Ud-Din², Robert G Palgrave¹, Haji Muhammad³, Sammer Yousuf⁴, Tim Evans¹

Affiliations

¹ Chemistry Department, University College London, 20 Gordon Street, London, WC1E 0AJ, UK.
² Department of Chemistry, Quaid-i-Azam University, Islamabad, 453208, Pakistan.
³ Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Karachi, 75300, Pakistan.
⁴ H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.

Abstract

A series of imidazolium-based symmetrical and asymmetrical dicationic ionic liquids (DcILs) with alkyl spacers of different length and with [FeCl₃ Br]^- as counter ion have been synthesized. The synthesized DcILs are characterized by using FTIR and Raman spectroscopy as well as mass spectrometry, along with single-crystal XRD analysis. Physicochemical properties such as solubility, thermal stability and magnetic susceptibility are also measured. These compounds show low melting points, good solubility in water and organic solvents, thermal stability, and paramagnetism. The products of molar susceptibility and temperature (χ_mol ⋅T) for the synthesized DcILs have been found between 4.05 to 4.79 emu mol^-1 K Oe^-1 and effective magnetic moment values have also been determined to be compared to that expected from the spin-only approximation.

Keywords: X-ray crystal analysis; dicationic ionic liquids; iron; magnetic susceptibility; physico-chemical properties.

Grants and funding

Commonwealth Scholarship