The ionic pairing of 1-butyl-3-methylimidazolium tetrachloroferrate [Bmim] [FeCl4] magnetic ionic liquid in two plasticizers ethylene carbonate (EC), propylene carbonate (PC) separately and combination of (EC–PC) has been studied by ATR Infrared spectroscopy. Spectra were taken in the IR range 600 to 4000 cm–1. For experimental analysis plasticizer concentration range of 0.5 to 2.0 mol was used. The interaction of [Bmim] with these plasticizers (EC, PC and EC + PC) modifies the Hydrogen bonding. The complex and broad bands in FTIR after interactions is an indication of ionic pairing.
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Pandey et al. (2026) studied this question.
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