Synthesis, structural analysis, electrochemical and magnetic properties of tetrachloroferrate ionic liquids

Abstract

Eight ionic liquids have been synthesized with the tetrachloroferrate anion and varying cations having general formula [RA]+[FeCl4]−. They were characterized using spectroscopic techniques such as FT-IR, NMR, ESI-MS, Raman, and...

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

“…The bond lengths for Fe−Cl and Fe−Br are in the range of 2.226(8)–2.301(8) Å and 2.036(19)–2.309(9) Å, respectively, and are comparable to values found in the literature [57] . The mean value for bond angles of Cl−Fe−Cl and Br−Fe−Br comes out to be same 109.3(3)° which is good in agreement with the mentioned geometry of the species and tallies with reported values in the previous studies [35] …”

“…[32] Here, we describe magnetic dicationic ionic liquids, consisting of a high-spin d 5 iron(III) system in the form of [FeCl 3 Br] À as paramagnetic counter anion which is also responsible for lowering the melting point while still permitting the tunability of many physicochemical properties with the retention of magnetic responsivity. [33] Keeping these aspects in view and in continuation to our previous work, [34][35][36] here, imidazolium-based symmetrical and asymmetrical DcILs linked with different alkyl chains (spacer groups), and [FeCl 3 Br] À as counter ion, have been synthesized. The characterization of these DcILs has been carried out through 1 H, 13 C NMR, FTIR, and Raman spectroscopy along with mass spectrometry, thermogravimetry and single-crystal XRD analyses.…”

“… [57] The mean value for bond angles of Cl−Fe−Cl and Br−Fe−Br comes out to be same 109.3(3)° which is good in agreement with the mentioned geometry of the species and tallies with reported values in the previous studies. [35] …”

An X-ray photoelectron spectroscopy study of ionic liquids based on a bridged dicationic moiety

“…The chemical properties can be tuned by the chemical variation of ILs to expand their applications and for this reason, they are referred to as neoteric designer solvents. 29,30 DcILs are an interesting class of ILs that not only have extended the chemical space but also offer more opportunities to improve their functions by giving many options for chemical modifications with tuneable properties. 31 The incorporation of two charges in DcILs allows more tailoring of the IL with two different anions and more tailoring of the IL with two different anions and they exhibit even higher thermal stability properties.…”

A systematic comparison of the extraction and adsorption of theophylline by new amino acid ester-based ionic liquids

“…To date, ionic liquids have shown broad application prospects in the area of separation science due to the variety of available structures, their good thermal stability, their excellent solubility, their high efficiency, their ideal recyclability, and because they have fewer effects on humans and the environment. 11,12 In addition, the designable structures and properties of ionic liquids enable the selective extraction, separation, and purification of certain natural active ingredients, and they also meet the requirements of green chemistry. 13,14 For alkaloids, allylmethylimidazolium bromide ([Amim][Br]), 15 1-butyl-3-methylimidazolium tetrafluoroborate ([C 4 mim][BF 4 ]), 16 1-(2-hydroxyethyl)-3-methylimidazolium tetrachloridoferrate ([C 2 OHmim][FeCl 4 ]), 17 1-butyl-3-methylimidazolium chloride ([C 4 mim][Cl]), 18 and 1-butyl-3-methylimidazolium acesulfamate ([C 4 C 1 im][Ace]) 19 have been used, but ionic liquids other than substituted imidazoles have been rarely studied; moreover, theophylline has not been separated via liquid–liquid extraction with ILs.…”